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Nguyen AT, McSorley SJ. Fighting the enemy within: systemic immune defense against mucosal Salmonella infection. Immunol Lett 2024:106930. [PMID: 39343314 DOI: 10.1016/j.imlet.2024.106930] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2024] [Revised: 09/05/2024] [Accepted: 09/17/2024] [Indexed: 10/01/2024]
Abstract
Salmonella infection remains a persistent global health threat, as different serovars induce a range of clinical disease, depending upon bacterial virulence and host susceptibility. While some Salmonella serovars induce gastroenteritis in healthy individuals, others can cause more serious systemic enteric fever or invasive nontyphoidal Salmonellosis. The rise of antibiotic resistance, coupled with the absence of effective vaccines for most serovars, perpetuates the spread of Salmonella in endemic regions. A detailed mechanistic understanding of immunity to Salmonella infections has been aided by the availability of mouse models that have served as a valuable tool for understanding host-pathogen interactions under controlled laboratory conditions. These mouse studies have delineated the processes by which early inflammation is triggered after infection, how adaptive immunity is initiated in lymphoid tissues, and the contribution of lymphocyte memory responses to resistance. While recent progress has been made in vaccine development for some causes of enteric fever, deeper understanding of Salmonella-specific immune memory might allow the formation of new vaccines for all serovars. This review will provide a summary of our understanding of vaccination and protective immunity to Salmonella with a focus on recent developments in T cell memory formation.
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Affiliation(s)
- Alana T Nguyen
- Department of Anatomy, Physiology and Cell Biology, School of Veterinary Medicine, University of California Davis, Davis, CA 95616, USA
| | - Stephen J McSorley
- Department of Anatomy, Physiology and Cell Biology, School of Veterinary Medicine, University of California Davis, Davis, CA 95616, USA.
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Martin LB, Tack B, Marchello CS, Sikorski MJ, Owusu-Dabo E, Nyirenda T, Mogasale V, Crump JA. Vaccine value profile for invasive non-typhoidal Salmonella disease. Vaccine 2024; 42:S101-S124. [PMID: 39003017 DOI: 10.1016/j.vaccine.2024.04.045] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2022] [Revised: 04/12/2024] [Accepted: 04/14/2024] [Indexed: 07/15/2024]
Abstract
Invasive non-typhoidal Salmonella (iNTS) disease is an under-recognized high-burden disease causing major health and socioeconomic issues in sub-Saharan Africa (sSA), predominantly among immune-naïve infants and young children, including those with recognized comorbidities such as HIV infection. iNTS disease is primarily caused by Salmonella enterica serovar Typhimurium sequence type (ST) 313 and 'African-restricted clades' of Salmonella Enteritidis ST11 that have emerged across the African continent as a series of epidemics associated with acquisition of new antimicrobial resistance. Due to genotypes with a high prevalence of antimicrobial resistance and scarcity of therapeutic options, these NTS serovars are designated by the World Health Organization as a priority pathogen for research and development of interventions, including vaccines, to address and reduce NTS associated bacteremia and meningitis in sSA. Novel and traditional vaccine technologies are being applied to develop vaccines against iNTS disease, and the results of the first clinical trials in the infant target population should become available in the near future. The "Vaccine Value Profile" (VVP) addresses information related predominantly to invasive disease caused by Salmonella Enteritidis and Salmonella Typhimurium prevalent in sSA. Information is included on stand-alone iNTS disease candidate vaccines and candidate vaccines targeting iNTS disease combined with another invasive serotype, Salmonella Typhi, that is also common across sSA. Out of scope for the first version of this VVP is a wider discussion on either diarrheagenic NTS disease (dNTS) also associated with Salmonella Enteritidis and Salmonella Typhimurium or the development of a multivalent Salmonella vaccines targeting key serovars for use globally. This VVP for vaccines to prevent iNTS disease is intended to provide a high-level, holistic assessment of the information and data that are currently available to inform the potential public health, economic, and societal value of pipeline vaccines and vaccine-like products. Future versions of this VVP will be updated to reflect ongoing activities such as vaccine development strategies and a "Full Vaccine Value Assessment" that will inform the value proposition of an iNTS disease vaccine. This VVP was developed by a working group of subject matter experts from academia, non-profit organizations, public private partnerships, and multi-lateral organizations, and in collaboration with stakeholders from the World Health Organization African Region. All contributors have extensive expertise on various elements of the iNTS disease VVP and collectively aimed to identify current research and knowledge gaps. The VVP was developed using only existing and publicly available information.
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Affiliation(s)
| | - Bieke Tack
- Department of Clinical Sciences, Institute of Tropical Medicine Antwerp, Belgium and Department of Microbiology, Immunology and Transplantation, KU Leuven, Belgium.
| | | | - Michael J Sikorski
- Center for Vaccine Development and Global Health, University of Maryland School of Medicine, Baltimore, MD, USA.
| | | | | | | | - John A Crump
- Centre for International Health, University of Otago, New Zealand.
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Brek T, Gohal GA, Yasir M, Azhar EI, Al-Zahrani IA. Meningitis and Bacteremia by Unusual Serotype of Salmonella enterica Strain: A Whole Genome Analysis. Interdiscip Perspect Infect Dis 2024; 2024:3554734. [PMID: 38558876 PMCID: PMC10980553 DOI: 10.1155/2024/3554734] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 12/27/2023] [Accepted: 03/17/2024] [Indexed: 04/04/2024] Open
Abstract
Background Although meningitis caused by Salmonella species is relatively rare and accounts for <1% of the confirmed cases in neonates, it is associated with case complications and fatality rates up to 50-70% when compared to other forms of Gram-negative bacilli meningitis. Objectives We conducted an investigation into the first reported case of neonatal meningitis caused by nontyphoidal S. enterica in Jazan, a region in the southwestern part of Saudi Arabia. Methods CSF and blood culture were collected from a female neonate patient to confirm the presence of bacterial meningitis. WGS was conducted to find out the comprehensive genomic characterization of S. enterica isolate. Results A 3-week-old infant was admitted to a local hospital with fever, poor feeding, and hypoactivity. She was diagnosed with Salmonella meningitis and bacteremia caused by S. enterica, which was sensitive to all antimicrobials tested. WGS revealed the specific strain to be S. enterica serotype Johannesburg JZ01, belonging to ST515 and cgMLST 304742. Conclusions We presented a genomic report of rare case of NTS meningitis in an infant who is living in a rural town in Jazan region, Saudi Arabia. Further research is required to understand the impact of host genetic factors on invasive nontyphoidal Salmonella infection.
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Affiliation(s)
- Thamer Brek
- Medical Laboratory Sciences Department, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
- Public Health Laboratory, The Regional Laboratory and the Central Blood Bank, Jazan Health Directorate, Jazan, Saudi Arabia
| | - Gassem A. Gohal
- Department of Pediatrics, Faculty of Medicine, Jazan University, Jazan, Saudi Arabia
| | - Muhammad Yasir
- Medical Laboratory Sciences Department, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
- Special Infectious Agents Unit-Biosafety Level-3, King Fahd Medical Research Centre, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Esam I. Azhar
- Medical Laboratory Sciences Department, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
- Special Infectious Agents Unit-Biosafety Level-3, King Fahd Medical Research Centre, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Ibrahim A. Al-Zahrani
- Medical Laboratory Sciences Department, Faculty of Applied Medical Sciences, King Abdulaziz University, Jeddah, Saudi Arabia
- Special Infectious Agents Unit-Biosafety Level-3, King Fahd Medical Research Centre, King Abdulaziz University, Jeddah, Saudi Arabia
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Muthumbi EM, Mwanzu A, Mbae C, Bigogo G, Karani A, Mwarumba S, Verani JR, Kariuki S, Scott JAG. The epidemiology of fecal carriage of nontyphoidal Salmonella among healthy children and adults in three sites in Kenya. PLoS Negl Trop Dis 2023; 17:e0011716. [PMID: 37883602 PMCID: PMC10629669 DOI: 10.1371/journal.pntd.0011716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 11/07/2023] [Accepted: 10/10/2023] [Indexed: 10/28/2023] Open
Abstract
BACKGROUND Despite the importance of non-Typhoidal Salmonella (NTS) disease in Africa, epidemiologic data on carriage and transmission are few. These data are important to understand the transmission of NTS in Africa and to design control strategies. METHOD To estimate the prevalence of stool carriage of NTS in Kenya, we conducted a cross-sectional study in Kilifi, Nairobi, and Siaya, sites with a low, moderate and high incidence of invasive NTS disease, respectively. At each site, we randomly selected 100 participants in each age-group of 0-11 months, 12-59 months, 5-14 years, 15-54 years and ≥55 years. We collected stool, venous blood (for hemoglobin and malaria rapid tests), anthropometric measurements, and administered a questionnaire on Water Access Sanitation and Hygiene (WASH) practices. Stool samples were cultured on selective agar for Salmonella; suspect isolates underwent serotyping and antimicrobial susceptibility testing. RESULT Overall, 53 (3.5%) isolates of NTS were cultured from 1497 samples. Age-adjusted prevalence was 13.1% (95%CI 8.8-17.4) in Kilifi, 0.4% (95%CI 0-1.3) in Nairobi, and 0.9% (95%CI 0-2.0) in Siaya. Prevalence was highest among those aged 15-54 years (6.2%). Of 53 isolates; 5 were S. Enteritidis, 1 was S. Typhimurium. No S. Typhi was isolated. None of the risk factors were associated with carriage of NTS. All isolates were susceptible to all antibiotics tested, including ampicillin, chloramphenicol, ciprofloxacin and co-trimoxazole. CONCLUSION Prevalence of fecal carriage was high in Kilifi, an area of low incidence of invasive NTS disease and was low in areas of higher incidence in Nairobi and Siaya. The age-prevalence, risk factors, geographical and serotype distribution of NTS in carriage differs from invasive disease.
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Affiliation(s)
- Esther M. Muthumbi
- Kenya Medical Research Institute–Centre for Geographic Medicine Research, Coast, Kilifi, Kenya
- Department of Infectious Disease Epidemiology, London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Alfred Mwanzu
- Kenya Medical Research Institute–Centre for Geographic Medicine Research, Coast, Kilifi, Kenya
| | - Cecilia Mbae
- Kenya Medical Research Institute–Centre for Microbiology Research, Nairobi, Kenya
| | - Godfrey Bigogo
- Kenya Medical Research Institute–Centre for Global Health Research, Kisumu, Kenya
| | - Angela Karani
- Kenya Medical Research Institute–Centre for Geographic Medicine Research, Coast, Kilifi, Kenya
| | - Salim Mwarumba
- Kenya Medical Research Institute–Centre for Geographic Medicine Research, Coast, Kilifi, Kenya
| | - Jennifer R. Verani
- U.S. Centers for Disease Control and Prevention, Division of Global Health Protection, Nairobi, Kenya
| | - Samuel Kariuki
- Kenya Medical Research Institute–Centre for Microbiology Research, Nairobi, Kenya
| | - J. Anthony G. Scott
- Kenya Medical Research Institute–Centre for Geographic Medicine Research, Coast, Kilifi, Kenya
- Department of Infectious Disease Epidemiology, London School of Hygiene and Tropical Medicine, London, United Kingdom
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Uzairue LI, Shittu OB, Ojo OE, Obuotor TM, Olanipekun G, Ajose T, Arogbonlo R, Medugu N, Ebruke B, Obaro SK. Antimicrobial resistance and virulence genes of invasive Salmonella enterica from children with bacteremia in north-central Nigeria. SAGE Open Med 2023; 11:20503121231175322. [PMID: 37223673 PMCID: PMC10201152 DOI: 10.1177/20503121231175322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Accepted: 04/25/2023] [Indexed: 05/25/2023] Open
Abstract
Objectives Bacteremia due to invasive Salmonella enterica has been reported earlier in children in Nigeria. This study aimed to detect the virulence and antibiotic resistance genes of invasive Salmonella enterica from children with bacteremia in north-central Nigeria. Method From June 2015 to June 2018, 4163 blood cultures yielded 83 Salmonella isolates. This is a secondary cross-sectional analysis of the Salmonella isolates. The Salmonella enterica were isolated and identified using standard bacteriology protocol. Biochemical identifications of the Salmonella enterica were made by Phoenix MD 50 identification system. Further identification and confirmation were done with polyvalent antisera O and invA gene. Antimicrobial susceptibility testing was done following clinical and laboratory standard institute guidelines. Resistant genes and virulence genes were determined using a real-time polymerase chain reaction. Result Salmonella typhi 51 (61.4%) was the most prevalent serovar, followed by Salmonella species 13 (15.7%), choleraesuis 8 (9.6%), enteritidis 6 (7.2%), and typhimurium 5 (6.1%). Fifty-one (61.4%) of 83 Salmonella enterica were typhoidal, while 32 (38.6%) were not. Sixty-five (78.3%) of the 83 Salmonella enterica isolates were resistant to ampicillin and trimethoprim-sulfamethoxazole, followed by chloramphenicol 39 (46.7%), tetracycline 41 (41.4%), piperacillin 33 (33.9%), amoxicillin-clavulanate, and streptomycin 21 (25.3%), while cephalothin was 19 (22.9%). Thirty-nine (46.9%) of the 83 Salmonella enterica isolates were multi-drug resistant, and none were extensive drug resistant or pan-drug resistant. A blaTEM 42 (50.6%), floR 32 (38.6%), qnrA 24 (28.9%), tetB 20 (20.1%), tetA 10 (10.0%), and tetG 5 (6.0%) were the antibiotic resistance genes detected. There were perfect agreement between phenotypic and genotypic detection of antimicrobial resistance in tetracycline, ciprofloxacin, and chloramphenicol, while beta-lactam showed κ = 0.60 agreement. All of the Salmonella enterica isolates had the virulence genes invA, sopB, mgtC, and sip4D, while 33 (39.8%), 45 (51.8%), and 2 (2.4%) had ssaQ, spvC, and ljsGI-1, respectively. Conclusion Our findings showed multi-drug resistant Salmonella enterica in children with bacteremia in northern Nigeria. In addition, significant virulence and antimicrobial resistance genes were found in invasive Salmonella enterica in northern Nigeria. Thus, our study emphasizes the need to monitor antimicrobial resistance in Salmonella enterica from invasive sources in Nigeria and supports antibiotic prudence.
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Affiliation(s)
- Leonard I Uzairue
- Department of Microbiology, Federal
University of Agriculture, Abeokuta, Ogun State, Nigeria
- International Foundation Against
Infectious Disease in Nigeria, Abuja, Nigeria
- Department of Medical Laboratory
Sciences, Federal University Oye Ekiti, Ekiti State, Nigeria
| | - Olufunke B Shittu
- Department of Microbiology, Federal
University of Agriculture, Abeokuta, Ogun State, Nigeria
| | - Olufemi E Ojo
- Department of Veterinary Microbiology
and Parasitology, Federal University of Agriculture, Abeokuta, Nigeria
| | - Tolulope M Obuotor
- Department of Microbiology, Federal
University of Agriculture, Abeokuta, Ogun State, Nigeria
| | - Grace Olanipekun
- International Foundation Against
Infectious Disease in Nigeria, Abuja, Nigeria
| | - Theresa Ajose
- International Foundation Against
Infectious Disease in Nigeria, Abuja, Nigeria
| | - Ronke Arogbonlo
- International Foundation Against
Infectious Disease in Nigeria, Abuja, Nigeria
| | - Nubwa Medugu
- International Foundation Against
Infectious Disease in Nigeria, Abuja, Nigeria
- Department of Microbiology and
Parasitology, National Hospital, Abuja, FCT, Nigeria
| | - Bernard Ebruke
- International Foundation Against
Infectious Disease in Nigeria, Abuja, Nigeria
| | - Stephen K Obaro
- International Foundation Against
Infectious Disease in Nigeria, Abuja, Nigeria
- Pediatric Infectious Division, the
University of Nebraska Medical Center, Omaha, NE, USA
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Wang H, Cheng H, Huang B, Hu X, Chen Y, Zheng L, Yang L, Deng J, Wang Q. Characterization of resistance genes and plasmids from sick children caused by Salmonella enterica resistance to azithromycin in Shenzhen, China. Front Cell Infect Microbiol 2023; 13:1116172. [PMID: 37065212 PMCID: PMC10090516 DOI: 10.3389/fcimb.2023.1116172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Accepted: 03/15/2023] [Indexed: 03/31/2023] Open
Abstract
IntroductionSamonella is 1 of 4 key global causes of diarrhoeal diseases, sometimes it can be serious, especially for yong children. Due to the extensive resistance of salmonella serotypes to conventional first-line drugs, macrolides (such as azithromycin) have been designated as the most important antibiotics for the treatment of salmonella. Antimicrobial resistance is a major public health problem in the world, and the mechanism of azithromycin resistance is rarely studied.MethodsThis study determined the azithromycin resistance and plasmids of Salmonella enterica isolates from children attending the Shenzhen Children’s Hospital. The susceptibility of ampicillin (AMP), ciprofloxacin (CIP), ceftriaxone (CRO), sulfamethoxazole (SMZ), chloramphenicol (CL), and azithromycin (AZM) were detected and the genes and plasmids from azithromycin-resistant Salmonella were detected by Illumina hi-seq and Nanopore MinIone whole genome sequencing (WGS) using a map-based method, and the genomic background of these factors was evaluated using various bioinformatics tools.ResultsIn total, 15 strains of nontyphoid Salmonella strains that were isolated (including S. typhimurium, S.London, S. Goldcoast, and S.Stanley) demonstrated resistance to azithromycin (minimum inhibitory concentration,MIC from 32 to >256 µg/mL), and the resistance rate was 3.08% (15/487). The sensitivity test to other antibiotics demonstrated 100% resistance to AMP, and the resistance to SMZ and CL was 86.7% and 80.0%, respectively. Through WGS analysis, all isolates were positive for a plasmid-encoded mphA gene. Plasmid incompatibility typing identified five IncFIB(K), five IncHI2/HI2A/Q1, two IncC, one IncHI2/HI2A/N, one IncR, one IncFII and one IncHI2/HI2A plasmids. Sequence analyses of plasmids revealed extensive homology to various plasmids or transposons in regions involved in plasmid replication/maintenance functions and/or in antibiotic resistance gene clusters.ConclusionmphA is the main gene involved in azithromycin, a macrolide, and resistance to Salmonella. It is usually located on plasmids and easily spreads, hence posing a great threat to the current treatment of Salmonella infection. The plasmid sequence similarities suggest that the plasmids acquired resistance genes from a variety of enterica bacteria and underscore the importance of a further understanding of horizontal gene transfer among enterica bacteria.
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Affiliation(s)
- Hongmei Wang
- Laboratory Medicine Centre, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Hang Cheng
- School of Medicine, Southern University of Science and Technology, ShenZhen, Guangdong, China
| | - Baoxing Huang
- Department of Infectious Diseases, Shenzhen Children’s Hospital, Shenzhen, China
| | - Xiumei Hu
- Laboratory Medicine Centre, Nanfang Hospital, Southern Medical University, Guangzhou, China
| | - Yunsheng Chen
- Department of Infectious Diseases, Shenzhen Children’s Hospital, Shenzhen, China
| | - Lei Zheng
- Laboratory Medicine Centre, Nanfang Hospital, Southern Medical University, Guangzhou, China
- *Correspondence: Qian Wang, ; Jikui Deng, ; Liang Yang, ; Lei Zheng,
| | - Liang Yang
- School of Medicine, Southern University of Science and Technology, ShenZhen, Guangdong, China
- *Correspondence: Qian Wang, ; Jikui Deng, ; Liang Yang, ; Lei Zheng,
| | - Jikui Deng
- Department of Infectious Diseases, Shenzhen Children’s Hospital, Shenzhen, China
- *Correspondence: Qian Wang, ; Jikui Deng, ; Liang Yang, ; Lei Zheng,
| | - Qian Wang
- Laboratory Medicine Centre, Nanfang Hospital, Southern Medical University, Guangzhou, China
- Center for Clinical Laboratory, Zhujiang Hospital, Southern Medical University, Guangzhou, China
- *Correspondence: Qian Wang, ; Jikui Deng, ; Liang Yang, ; Lei Zheng,
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Whole Exome Sequence Analysis for Inborn Errors of IL-12/IFN- γ Axis in Patient with Recurrent Typhoid Fever. BIOMED RESEARCH INTERNATIONAL 2023; 2023:1761283. [PMID: 36845636 PMCID: PMC9957627 DOI: 10.1155/2023/1761283] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 09/25/2022] [Accepted: 09/30/2022] [Indexed: 02/19/2023]
Abstract
Background The IL-12/IFN-γ axis pathways play a vital role in the control of intracellular pathogens such as Salmonella typhi. Objective The study is aimed at using whole exome sequencing (WES) to screen out genetic defects in IL-12/IFN-γ axis in patients with recurrent typhoid fever. Methods WES using next-generation sequencing was performed on a single patient diagnosed with recurrent typhoid fever. Following alignment and variant calling, exomes were screened for mutations in 25 genes that are involved in the IL-12/IFN-γ axis pathway. Each variant was assessed by using various bioinformatics mutational analysis tools such as SIFT, Polyphen2, LRT, MutationTaster, and MutationAssessor. Results Out of 25 possible variations in the IL-12/IFN-γ axis genes, only 2 probable disease-causing mutations were identified. These variations were rare and include mutations in IL23R and ZNFX I. Other pathogenic mutations were found, but they were not considered likely to cause disease based on various mutation predictors. Conclusion Applying WES to the patient with recurrent typhoid fever detects variants that are not much important as other genes in the IL-12/IFN-γ axis. Results of the current study suggest that a large population sizes would be needed to examine the functional relevance of IL-12/IFN-γ axis genes with recurrent typhoid fever.
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Chen H, Qiu H, Zhong H, Cheng F, Wu Z, Shi T. Non-Typhoidal Salmonella Infections Among Children in Fuzhou, Fujian, China: A 10-Year Retrospective Review from 2012 to 2021. Infect Drug Resist 2023; 16:2737-2749. [PMID: 37180635 PMCID: PMC10171219 DOI: 10.2147/idr.s408152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Accepted: 04/22/2023] [Indexed: 05/16/2023] Open
Abstract
Purpose Non-typhoidal salmonella (NTS) infection is a leading cause of acute gastroenteritis in children. Recently, NTS infections have increased, especially those associated with Salmonella Typhimurium, which has become a global problem because of its high level of drug resistance. Diseases caused by NTS serotypes vary considerably. We summarised NTS infections among children in Fuzhou, Fujian, China, from 2012 to 2021, and synthesised studies indicating the clinical symptoms, laboratory test results, and drug resistance associated with S. Typhimurium and non-S. Typhimurium to enhance the knowledge of these infections and improve their diagnoses and treatment. Patients and Methods Between January 2012 and December 2021, 691 children with NTS infections confirmed by positive culture test results were recruited from Fujian Children's Hospital and Fujian Maternity and Child Health Hospital. Clinical demographic data of each case were collected from the electronic medical records and analysed. Results A total of 691 isolates were identified. The number of NTS infections increased significantly in 2017 and increased sharply during 2020 and 2021, especially S. Typhimurium greatly increased and was the dominant serotype (58.3%). S. Typhimurium infection was commonly occurred in children younger than 3 years and most of them were gastrointestinal infection, while non-S. Typhimurium more often observed in older children and associated with extra-intestinal infection. The rate of multidrug-resistant S. Typhimurium was significantly higher than that of non-S. Typhimurium, especially during the last 2 years of this study (2020 and 2021). Conclusion S. Typhimurium was the dominant serotype and greatly increased among children in Fuzhou city. There are significant differences in clinical symptoms, laboratory test results, and drug resistance between S. Typhimurium and non-S. Typhimurium. More attention should be paid on S. Typhimurium. Long-term high-quality surveillance and control measures should be conducted to prevent salmonella infections and drug resistance.
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Affiliation(s)
- Huiyu Chen
- Department of Clinical Laboratory, Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, Fujian, People’s Republic of China
| | - Huahong Qiu
- Department of Clinical Laboratory, Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, Fujian, People’s Republic of China
| | - Hui Zhong
- Department of Clinical Laboratory, Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, Fujian, People’s Republic of China
| | - Feng Cheng
- Department of Laboratory Medicine, Fujian Children’s Hospital, Fujian Provincial Maternity and Children’s Hospital, Fuzhou, Fujian, People’s Republic of China
| | - Zhihui Wu
- Department of Clinical Laboratory, Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fuzhou, Fujian, People’s Republic of China
| | - Tengfei Shi
- Department of Clinical Laboratory, Fuzhou Second Hospital Affiliated to Xiamen University, Fuzhou, Fujian, People’s Republic of China
- Correspondence: Tengfei Shi, Department of Clinical Laboratory, Fuzhou Second Hospital Affiliated to Xiamen University, Shang Teng Road No. 47 Cang’shan District, Fuzhou, Fujian, People’s Republic of China, Tel +86-591-22169098, Email
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Jiang M, Wang HM, Zhou GL, Chen YS, Deng JK. Invasive Salmonella Infections Among Children in Shenzhen, China: A Five-year Retrospective Review. Pediatr Infect Dis J 2022; 41:684-689. [PMID: 35622427 DOI: 10.1097/inf.0000000000003588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Invasive Salmonella infections are highly prevalent worldwide. Clinical data of childhood invasive Salmonella infections from China are limited. METHODS Data of hospitalized children <18 years old with invasive Salmonella infections from 2016 to 2020 in Shenzhen Children's Hospital in Shenzhen were retrospectively collected. Serotypes and antimicrobial susceptibility tests of the invasive Salmonella isolates were performed. RESULTS Sixty-three cases were enrolled during the 5-year study period including 8 in 2016, 11 in 2017, 16 in 2018, 6 in 2019 and 22 in 2020. The median age was 15 months (interquartile range, 11-22 months), and 79.4% (50 cases) were <2 years of age. Underlying diseases were found in 28.6% (18 cases) of the patients with a great variety, but no cases of malaria or HIV infection were identified. Most of the invasive Salmonella cases were bloodstream infections (84.1%), followed by osteoarthritis (11.1%) and meningitis (4.8%). Gastroenteritis (49.2%) and pneumonia (28.6%) were found to be the major manifestations among the patients. Furthermore, invasive Salmonella infections resulted in the death of 3 children (4.8%). Salmonella enteritis (12 cases; 15.9%) and Salmonella typhimurium (9 cases; 19.0%) as the most common serovars were identified. The resistance rates of Salmonella strains to ceftriaxone, ceftazidime and cefepime were also measured to be 17.5%, 17.5% and 9.5%, respectively. CONCLUSIONS An increasing number of childhood invasive Salmonella infections with a broad range of serotypes was observed in Shenzhen, China. It is critical to pay attention to the antimicrobial resistance of the isolates taken from children with invasive Salmonella infections.
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Affiliation(s)
| | | | - Guang-Lun Zhou
- Department of Urology and Laboratory of Pelvic Floor Muscle Function
| | - Yun-Sheng Chen
- Department of Clinical Laboratory, Shenzhen Children's Hospital, Shenzhen, China
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Elucidating Mechanisms of Tolerance to Salmonella Typhimurium across Long-Term Infections Using the Collaborative Cross. mBio 2022; 13:e0112022. [PMID: 35880881 PMCID: PMC9426527 DOI: 10.1128/mbio.01120-22] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Understanding the molecular mechanisms underlying resistance and tolerance to pathogen infection may present the opportunity to develop novel interventions. Resistance is the absence of clinical disease with a low pathogen burden, while tolerance is minimal clinical disease with a high pathogen burden. Salmonella is a worldwide health concern. We studied 18 strains of collaborative cross mice that survive acute Salmonella Typhimurium (STm) infections. We infected these strains orally and monitored them for 3 weeks. Five strains cleared STm (resistant), six strains maintained a bacterial load and survived (tolerant), while seven strains survived >7 days but succumbed to infection within the study period and were called “delayed susceptible.” Tolerant strains were colonized in the Peyer’s patches, mesenteric lymph node, spleen, and liver, while resistant strains had significantly reduced bacterial colonization. Tolerant strains had lower preinfection core body temperatures and had disrupted circadian patterns of body temperature postinfection sooner than other strains. Tolerant strains had higher circulating total white blood cells than resistant strains, driven by increased numbers of neutrophils. Tolerant strains had more severe tissue damage and higher circulating levels of monocyte chemoattractant protein 1 (MCP-1) and interferon gamma (IFN-γ), but lower levels of epithelial neutrophil-activating protein 78 (ENA-78) than resistant strains. Quantitative trait locus (QTL) analysis revealed one significant association and six suggestive associations. Gene expression analysis identified 22 genes that are differentially regulated in tolerant versus resistant animals that overlapped these QTLs. Fibrinogen genes (Fga, Fgb, and Fgg) were found across the QTL, RNA, and top canonical pathways, making them the best candidate genes for differentiating tolerance and resistance.
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Qu J, Zong Z. Giant splenic cyst complicated by infection due to Salmonella enterica serovar Livingstone in a previously healthy adolescent male: a case report. BMC Infect Dis 2022; 22:557. [PMID: 35717143 PMCID: PMC9206239 DOI: 10.1186/s12879-022-07529-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Accepted: 06/10/2022] [Indexed: 02/08/2023] Open
Abstract
Background Splenic cyst complicated by non-typhoid Salmonella infection is rare in healthy individuals in the era of antibiotics. Salmonella enterica subsp. enterica serovar Livingstone causing infection of giant splenic cyst has not been previously reported. Case presentation We report a case of giant splenic cyst (maximum diameter, 21 cm) complicated with Salmonella Livingstone infection, which resulted in splenic abscess, in a 16-year-old previously healthy adolescent male. The splenic abscess was successfully treated with ultrasonography-guided percutaneous drainage and antimicrobial therapy. Conclusion Infection of splenic cyst may be caused by S. Livingstone in immunocompetent individuals. This case may help clinicians to raise awareness towards splenic abscess and highlights the importance of drainage and antimicrobial agents to avoid splenectomy. Supplementary Information The online version contains supplementary material available at 10.1186/s12879-022-07529-6.
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Affiliation(s)
- Junyan Qu
- Center of Infectious Disease, West China Hospital (Huaxi), Sichuan University, Guoxuexiang 37, Chengdu, 610041, China
| | - Zhiyong Zong
- Center of Infectious Disease, West China Hospital (Huaxi), Sichuan University, Guoxuexiang 37, Chengdu, 610041, China. .,Center for Pathogen Research, West China Hospital, Sichuan University, Chengdu, China.
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12
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Genetic background influences survival of infections with Salmonella enterica serovar Typhimurium in the Collaborative Cross. PLoS Genet 2022; 18:e1010075. [PMID: 35417454 PMCID: PMC9067680 DOI: 10.1371/journal.pgen.1010075] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Revised: 05/04/2022] [Accepted: 03/25/2022] [Indexed: 12/18/2022] Open
Abstract
Salmonella infections typically cause self-limiting gastroenteritis, but in some individuals these bacteria can spread systemically and cause disseminated disease. Salmonella Typhimurium (STm), which causes severe systemic disease in most inbred mice, has been used as a model for disseminated disease. To screen for new infection phenotypes across a range of host genetics, we orally infected 32 Collaborative Cross (CC) mouse strains with STm and monitored their disease progression for seven days by telemetry. Our data revealed a broad range of phenotypes across CC strains in many parameters including survival, bacterial colonization, tissue damage, complete blood counts (CBC), and serum cytokines. Eighteen CC strains survived to day 7, while fourteen susceptible strains succumbed to infection before day 7. Several CC strains had sex differences in survival and colonization. Surviving strains had lower pre-infection baseline temperatures and were less active during their daily active period. Core body temperature disruptions were detected earlier after STm infection than activity disruptions, making temperature a better detector of illness. All CC strains had STm in spleen and liver, but susceptible strains were more highly colonized. Tissue damage was weakly negatively correlated to survival. We identified loci associated with survival on Chromosomes (Chr) 1, 2, 4, 7. Polymorphisms in Ncf2 and Slc11a1, known to reduce survival in mice after STm infections, are located in the Chr 1 interval, and the Chr 7 association overlaps with a previously identified QTL peak called Ses2. We identified two new genetic regions on Chr 2 and 4 associated with susceptibility to STm infection. Our data reveal the diversity of responses to STm infection across a range of host genetics and identified new candidate regions for survival of STm infection.
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Rana S, Maurya S, Mohapatra G, Singh S, Babar R, Chandrasekhar H, Chamoli G, Rathore D, Kshetrapal P, Srikanth CV. Activation of epigenetic regulator KDM6B by Salmonella Typhimurium enables chronic infections. Gut Microbes 2022; 13:1986665. [PMID: 34696686 PMCID: PMC8555538 DOI: 10.1080/19490976.2021.1986665] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Non-typhoidal Salmonella (NTS) infections result in self limiting gastroenteritis except in rare cases wherein manifestations of chronic infections can occur. Strategies employed by Salmonella to thrive in hostile environments of host during chronic infections are complex and multifaceted. In chronic state, a coordinated action of bacterial effectors allows reprogramming of macrophages to M2 subtype and thereby creating a permissible replicative niche. The mechanistic details of these processes are not fully known. In the current study we identified, histone H3-lysine 27 trimethylation (H3K27me3)-specific demethylase, KDM6B to be upregulated in both cell culture and in murine model of Salmonella infection. KDM6B recruitment upon infection exhibited an associated loss of overall H3K27me3 in host cells and was Salmonella SPI1 effectors coordinated. ChIP-qRT-PCR array analysis revealed several new gene promoter targets of KDM6B demethylase activity including PPARδ, a crucial regulator of fatty acid oxidation pathway and Salmonella-persistent infections. Furthermore, pharmacological inhibition of KDM6B demethylase activity with GSKJ4 in chronic Salmonella infection mice model led to a significant reduction in pathogen load and M2 macrophage polarization in peripheral lymphoid organs. The following work thus reveals Salmonella effector-mediated epigenetic reprogramming of macrophages responsible for its long-term survival and chronic carriage.
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Affiliation(s)
- Sarika Rana
- Laboratory of Gut Infection and Inflammation Biology, Regional Centre for Biotechnology, Faridabad, India,Manipal Academy of Higher Education, Manipal, Karnataka, India
| | - Sonalika Maurya
- Laboratory of Gut Infection and Inflammation Biology, Regional Centre for Biotechnology, Faridabad, India
| | - Gayatree Mohapatra
- Laboratory of Gut Infection and Inflammation Biology, Regional Centre for Biotechnology, Faridabad, India
| | - Savita Singh
- Maternal and Child Health, Translational Health Science and Technology Institute, Faridabad, India
| | - Rohan Babar
- Laboratory of Gut Infection and Inflammation Biology, Regional Centre for Biotechnology, Faridabad, India
| | - Hridya Chandrasekhar
- Laboratory of Gut Infection and Inflammation Biology, Regional Centre for Biotechnology, Faridabad, India
| | - Garima Chamoli
- Laboratory of Gut Infection and Inflammation Biology, Regional Centre for Biotechnology, Faridabad, India
| | - Deepak Rathore
- Maternal and Child Health, Translational Health Science and Technology Institute, Faridabad, India
| | - Pallavi Kshetrapal
- Maternal and Child Health, Translational Health Science and Technology Institute, Faridabad, India
| | - C. V. Srikanth
- Laboratory of Gut Infection and Inflammation Biology, Regional Centre for Biotechnology, Faridabad, India,CONTACT C. V. Srikanth Regional Centre for Biotechnology, 3rd Milestone Gurgaon Faridabad Expressway, Faridabad, India
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MacLennan CA. The Background, Role and Approach for Development of a Controlled Human Infection Model for Nontyphoidal Salmonella. Curr Top Microbiol Immunol 2021. [PMID: 34958419 DOI: 10.1007/82_2021_246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Nontyphoidal Salmonella (NTS) is responsible for a major global burden of disease and economic loss, particularly in low- and middle-income countries. It is designated a priority pathogen by the WHO for vaccine development and, with new impetus from vaccine developers, the establishment of an NTS controlled human infection model (CHIM) is timely and valuable. The broadly dichotomous clinical presentations of diarrhoea and invasive disease, commonly bacteraemia, present significant challenges to the development of an NTS CHIM. Nevertheless, if successful, such a CHIM will be invaluable for understanding the pathogenesis of NTS disease, identifying correlates of protection and advancing candidate vaccines towards licensure. This article describes the background case for a CHIM for NTS, the role of such a CHIM and outlines a potential approach to its development.
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Affiliation(s)
- Calman A MacLennan
- Jenner Institute, Nuffield Department of Medicine, University of Oxford, Oxford, OX3 7DQ, UK.
- Bill & Melinda Gates Foundation, 62 Buckingham Gate, London, SW16AJ, UK.
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15
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Li J, Claudi B, Fanous J, Chicherova N, Cianfanelli FR, Campbell RAA, Bumann D. Tissue compartmentalization enables Salmonella persistence during chemotherapy. Proc Natl Acad Sci U S A 2021; 118:e2113951118. [PMID: 34911764 PMCID: PMC8713819 DOI: 10.1073/pnas.2113951118] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/11/2021] [Indexed: 12/14/2022] Open
Abstract
Antimicrobial chemotherapy can fail to eradicate the pathogen, even in the absence of antimicrobial resistance. Persisting pathogens can subsequently cause relapsing diseases. In vitro studies suggest various mechanisms of antibiotic persistence, but their in vivo relevance remains unclear because of the difficulty of studying scarce pathogen survivors in complex host tissues. Here, we localized and characterized rare surviving Salmonella in mouse spleen using high-resolution whole-organ tomography. Chemotherapy cleared >99.5% of the Salmonella but was inefficient against a small Salmonella subset in the white pulp. Previous models could not explain these findings: drug exposure was adequate, Salmonella continued to replicate, and host stresses induced only limited Salmonella drug tolerance. Instead, antimicrobial clearance required support of Salmonella-killing neutrophils and monocytes, and the density of such cells was lower in the white pulp than in other spleen compartments containing higher Salmonella loads. Neutrophil densities declined further during treatment in response to receding Salmonella loads, resulting in insufficient support for Salmonella clearance from the white pulp and eradication failure. However, adjunctive therapies sustaining inflammatory support enabled effective clearance. These results identify uneven Salmonella tissue colonization and spatiotemporal inflammation dynamics as main causes of Salmonella persistence and establish a powerful approach to investigate scarce but impactful pathogen subsets in complex host environments.
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Affiliation(s)
- Jiagui Li
- Biozentrum, University of Basel, CH-4056 Basel, Switzerland
| | | | - Joseph Fanous
- Biozentrum, University of Basel, CH-4056 Basel, Switzerland
| | | | | | | | - Dirk Bumann
- Biozentrum, University of Basel, CH-4056 Basel, Switzerland
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Repurposing diphenylbutylpiperidine-class antipsychotic drugs for host-directed therapy of Mycobacterium tuberculosis and Salmonella enterica infections. Sci Rep 2021; 11:19634. [PMID: 34608194 PMCID: PMC8490354 DOI: 10.1038/s41598-021-98980-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Accepted: 09/06/2021] [Indexed: 02/08/2023] Open
Abstract
The persistent increase of multidrug-resistant (MDR) Mycobacterium tuberculosis (Mtb) infections negatively impacts Tuberculosis treatment outcomes. Host-directed therapies (HDT) pose an complementing strategy, particularly since Mtb is highly successful in evading host-defense by manipulating host-signaling pathways. Here, we screened a library containing autophagy-modulating compounds for their ability to inhibit intracellular Mtb-bacteria. Several active compounds were identified, including two drugs of the diphenylbutylpiperidine-class, Fluspirilene and Pimozide, commonly used as antipsychotics. Both molecules inhibited intracellular Mtb in pro- as well as anti-inflammatory primary human macrophages in a host-directed manner and synergized with conventional anti-bacterials. Importantly, these inhibitory effects extended to MDR-Mtb strains and the unrelated intracellular pathogen, Salmonella enterica serovar Typhimurium (Stm). Mechanistically Fluspirilene and Pimozide were shown to regulate autophagy and alter the lysosomal response, partly correlating with increased bacterial localization to autophago(lyso)somes. Pimozide's and Fluspirilene's efficacy was inhibited by antioxidants, suggesting involvement of the oxidative-stress response in Mtb growth control. Furthermore, Fluspirilene and especially Pimozide counteracted Mtb-induced STAT5 phosphorylation, thereby reducing Mtb phagosome-localized CISH that promotes phagosomal acidification. In conclusion, two approved antipsychotic drugs, Pimozide and Fluspirilene, constitute highly promising and rapidly translatable candidates for HDT against Mtb and Stm and act by modulating the autophagic/lysosomal response by multiple mechanisms.
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Kong Q, Liu S, Li A, Wang Y, Zhang L, Iqbal M, Jamil T, Shang Z, Suo LS, Li J. Characterization of fungal microbial diversity in healthy and diarrheal Tibetan piglets. BMC Microbiol 2021; 21:204. [PMID: 34217216 PMCID: PMC8254304 DOI: 10.1186/s12866-021-02242-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Accepted: 05/26/2021] [Indexed: 01/05/2023] Open
Abstract
BACKGROUND Diarrhea is an important ailment limiting the production of the Tibetan pig industry. Dynamic balance of the intestinal microbiota is important for the physiology of the animal. The objective of this work was to study fungal diversity in the feces of early weaning Tibetan piglets in different health conditions. RESULTS In the present study, we performed high-throughput sequencing to characterize the fungal microbial diversity in healthy, diarrheal and treated Tibetan piglets at the Tibet Autonomous Region of the People's Republic of China. The four alpha diversity indices (Chao1, ACE, Shannon and Simpson) revealed no significant differences in the richness across the different groups (P > 0.05). In all samples, the predominant fungal phyla were Ascomycota, Basidiomycota and Rozellomycota. Moreover, the healthy piglets showed a higher abundance of Ascomycota than the treated ones with a decreased level of Basidiomycota. One phylum (Rozellomycota) showed higher abundance in the diarrheal piglets than in the treated. At genus level, compared with that to the healthy group, the proportion of Derxomyces and Lecanicillium decreased, whereas that of Cortinarius and Kazachstania increased in the diarrheal group. The relative abundances of Derxomyces, Phyllozyma and Hydnum were higher in treated piglets than in the diarrheal ones. CONCLUSIONS A decreased relative abundance of beneficial fungi (e.g. Derxomyces and Lecanicillium) may cause diarrhea in the early-weaned Tibetan piglets. Addition of probiotics into the feed may prevent diarrhea at this stage. This study presented the fungal diversity in healthy, diarrheal and treated early-weaned Tibetan piglets.
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Affiliation(s)
- Qinghui Kong
- College of Veterinary Medicine, Huazhong Agricultural University, 430070, Wuhan, People's Republic of China. .,College of Animal Science, Tibet Agricultural and Animal Husbandry University, 860000, Nyingchi, People's Republic of China. .,Tibetan Plateau Feed Processing Engineering Research Center, 860000, Nyingchi, People's Republic of China.
| | - Suozhu Liu
- College of Animal Science, Tibet Agricultural and Animal Husbandry University, 860000, Nyingchi, People's Republic of China.,Tibetan Plateau Feed Processing Engineering Research Center, 860000, Nyingchi, People's Republic of China
| | - Aoyun Li
- College of Veterinary Medicine, Huazhong Agricultural University, 430070, Wuhan, People's Republic of China
| | - Yaping Wang
- College of Veterinary Medicine, Huazhong Agricultural University, 430070, Wuhan, People's Republic of China
| | - Lihong Zhang
- College of Veterinary Medicine, Huazhong Agricultural University, 430070, Wuhan, People's Republic of China
| | - Mudassar Iqbal
- College of Veterinary Medicine, Huazhong Agricultural University, 430070, Wuhan, People's Republic of China.,Faculty of Veterinary and Animal Sciences, The Islamia University of Bahawalpur, 63100, Bahawalpur, Pakistan
| | - Tariq Jamil
- Institute of Bacterial Infections and Zoonoses, Friedrich-Loeffler-Institut, 07743, Jena, Germany
| | - Zhenda Shang
- College of Animal Science, Tibet Agricultural and Animal Husbandry University, 860000, Nyingchi, People's Republic of China.,Tibetan Plateau Feed Processing Engineering Research Center, 860000, Nyingchi, People's Republic of China
| | - Lang-Sizhu Suo
- College of Animal Science, Tibet Agricultural and Animal Husbandry University, 860000, Nyingchi, People's Republic of China
| | - Jiakui Li
- College of Veterinary Medicine, Huazhong Agricultural University, 430070, Wuhan, People's Republic of China. .,College of Animal Science, Tibet Agricultural and Animal Husbandry University, 860000, Nyingchi, People's Republic of China.
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18
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Seribelli AA, da Silva P, Frazão MR, Kich JD, Allard MW, Falcão JP. Phylogenetic relationship and genomic characterization of Salmonella Typhimurium strains isolated from swine in Brazil. INFECTION GENETICS AND EVOLUTION 2021; 93:104977. [PMID: 34174480 DOI: 10.1016/j.meegid.2021.104977] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 05/29/2021] [Accepted: 06/21/2021] [Indexed: 02/07/2023]
Abstract
Salmonella Typhimurium has been transmitted between humans and animals. Although, Brazil has been one of the largest pork meat exporters worldwide, there are few studies that characterized epidemiologically S. Typhimurium strains from swine. The aims of this work were to study the phylogenetic relationship of S. Typhimurium genomes isolated from swine in Brazil among themselves and with other genomes isolated from several sources and countries using wgMLST and cgMLST and to perform the search of Salmonella pathogenicity islands (SPIs). In addition, for S. Typhimurium strains from swine to compare the virulence and antimicrobial resistance genes by VFDB and ResFinder, genetic content by BLAST Atlas and orthologous proteins clusters by OrthoVenn. The constructed phylogenetic trees by wgMLST and cgMLST grouped the majority (92.3% and 80.7%, respectively) of the strains isolated from swine in Brazil into the same group. All the isolates contained important SPIs (SPI-1, SPI-2, SPI-3, SPI-5 and SPI-9). A total of 100 and 31 virulence and resistance genes were detected in the S. Typhimurium strains isolated from swine, respectively. The BLAST Atlas and orthologous proteins analysis found regions of phages and differences in metabolic, regulatory and cellular processes among S. Typhimurium LT2 and S. Typhimurium isolates from swine. In conclusion, molecular typing based in the wgMLST and cgMLST suggested that the S. Typhimurium isolates from swine studied were genetically related. The pathogenic potential of the strains studied was corroborated by the presence of important SPIs and virulence genes. The high number of antimicrobial resistance genes detected is worrying and reinforced their potential risk in swine in Brazil. The comparison by BLAST Atlas suggested differences in mobile genetic elements among S. Typhimurium LT2 and S. Typhimurium isolates from swine in Brazil. The orthologous proteins analysis revealed unique genes related to important cellular processes in the strains from swine.
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Affiliation(s)
- Amanda Aparecida Seribelli
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Patrick da Silva
- Faculdade de Ciências Farmacêuticas de Araraquara, UNESP - Departamento de Ciências Biológicas, Rodovia Araraquara-Jaú Km 1, Araraquara, SP, Brazil
| | - Miliane Rodrigues Frazão
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil
| | - Jalusa Deon Kich
- Empresa Brasileira de Pesquisa Agropecuária - Suínos e Aves - EMBRAPA, Concórdia, SC, Brazil
| | - Marc W Allard
- Food and Drug Administration - FDA, College Park, MD, United States.
| | - Juliana Pfrimer Falcão
- Faculdade de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Ribeirão Preto, SP, Brazil.
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Lee JS, Mogasale V, Marks F, Kim J. Geographical distribution of risk factors for invasive non-typhoidal Salmonella at the subnational boundary level in sub-Saharan Africa. BMC Infect Dis 2021; 21:529. [PMID: 34090380 PMCID: PMC8180173 DOI: 10.1186/s12879-021-06198-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Accepted: 05/17/2021] [Indexed: 11/10/2022] Open
Abstract
Background Invasive non-typhoidal Salmonella (iNTS) is a growing health-concern in many parts of sub-Saharan Africa. iNTS is associated with fatal diseases such as HIV and malaria. Despite high case fatality rates, the disease has not been given much attention. The limited number of population-based surveillance studies hampers accurate estimation of global disease burden. Given the lack of available evidence on the disease, it is critical to identify high risk areas for future surveillance and to improve our understanding of iNTS endemicity. Methods Considering that population-based surveillance data were sparse, a composite index called the iNTS risk factor (iNRF) index was constructed based on risk factors that commonly exist across countries. Four risk factors associated with the prevalence of iNTS were considered: malaria, HIV, malnutrition, and safe water. The iNRF index was first generated based on the four risk factors which were collected within a 50 km radius of existing surveillance sites. Pearson product-moment correlation was used to test statistical associations between the iNRF index and the prevalence of iNTS observed in the surveillance sites. The index was then further estimated at the subnational boundary level across selected countries and used to identify high risk areas for iNTS. Results While the iNRF index in some countries was generally low (i.e. Rwanda) or high (i.e. Cote d’Ivoire), the risk-level of iNTS was variable not only by country but also within a country. At the provincial-level, the highest risk area was identified in Maniema, the Democratic Republic of Congo, whereas Dakar in Senegal was at the lowest risk. Conclusions The iNRF index can be a useful tool to understand the geographically varying risk-level of iNTS. Given that conducting a population-based surveillance study requires extensive human and financial resources, identifying high risk areas for iNTS prior to a study implementation can facilitate an appropriate site-selection process in the future. Supplementary Information The online version contains supplementary material available at 10.1186/s12879-021-06198-1.
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Affiliation(s)
- Jung-Seok Lee
- International Vaccine Institute, SNU Research Park, 1 Gwanak-ro, Gwanak-gu, Seoul, 08226, South Korea.
| | - Vittal Mogasale
- International Vaccine Institute, SNU Research Park, 1 Gwanak-ro, Gwanak-gu, Seoul, 08226, South Korea
| | - Florian Marks
- International Vaccine Institute, SNU Research Park, 1 Gwanak-ro, Gwanak-gu, Seoul, 08226, South Korea
| | - Jerome Kim
- International Vaccine Institute, SNU Research Park, 1 Gwanak-ro, Gwanak-gu, Seoul, 08226, South Korea
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Abstract
Acute bacterial gastroenteritis is among the most common infections worldwide, with millions of infections annually in the United States. Much of the illness is foodborne, occurring as both sporadic cases and large multistate outbreaks. Pathogen evolution through genetic exchange of virulence traits and antibiotic resistance determinants poses challenges for empiric therapy. Culture-independent diagnostic tests in clinical laboratories afford rapid diagnosis and expanded identification of pathogens. However, cultures remain important to generate sensitivity data and strain archiving for outbreak investigations. Most infections are self-limited, permitting judicious selection of antibiotic use in more severe forms of illness.
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Affiliation(s)
- James M Fleckenstein
- Department of Medicine, Division of Infectious Diseases, Washington University in Saint Louis, School of Medicine, Campus Box 8051, 660 South Euclid Avenue, Saint Louis, MO 63110, USA; Infectious Disease Section, Medicine Service, Veterans Affairs Saint Louis Health Care System, 915 North Grand Boulevard, Saint Louis, MO 63106, USA.
| | - F Matthew Kuhlmann
- Department of Medicine, Division of Infectious Diseases, Washington University in Saint Louis, School of Medicine, Campus Box 8051, 660 South Euclid Avenue, Saint Louis, MO 63110, USA
| | - Alaullah Sheikh
- Department of Medicine, Division of Infectious Diseases, Washington University in Saint Louis, School of Medicine, Campus Box 8051, 660 South Euclid Avenue, Saint Louis, MO 63110, USA
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21
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Wang X, Kong X, Qin Y, Zhu X, Qu D, Han J. Milk phospholipid supplementation mediates colonization resistance of mice against Salmonella infection in association with modification of gut microbiota. Food Funct 2021; 11:6078-6090. [PMID: 32568318 DOI: 10.1039/d0fo00883d] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Gut microbiota-mediated colonization resistance against enteropathogens is known to be greatly influenced by bioactive food compounds. This work aims to investigate the effects of milk phospholipid (MP) supplementation on the colonization resistance of mice to Salmonella enterica serovar Typhimurium (S. Typhimurium) infection, with the focus mainly on the change of gut microbiota. Comparative microbiota analysis based on 16S rRNA gene sequence data of mice under different MP supplementation situations allowed us to identify specific microbiota characteristics associated with the varying degree of susceptibility to S. Typhimurium infection. We found that a moderate dietary intake of MPs (0.05 wt%) significantly increased the relative abundance of Bacteroides spp. (p < 0.05) and the propionate level (p < 0.05) in the mouse colon and enhanced colonization resistance against S. Typhimurium infection, when compared with the un-supplemented S. Typhimurium-infected mice, whereas excessive MP supplementation (0.25 wt%) did not significantly change the level of Bacteroides spp. (p > 0.05) and propionate (p > 0.05) and even enhanced the susceptibility and severity of S. Typhimurium infection. Furthermore, the inhibitory effects of Bacteroides spp. and propionate on S. Typhimurium intestinal colonization were verified in an ex vivo S. Typhimurium-infected 3D colonoid culture system. Our results showed that the supplementation of nutraceuticals may not always be the more the better, particularly under specific pathological conditions, and identification of specific gut microbiota characteristics may have the potential to become an indicator of appropriate supplementation in specific cases.
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Affiliation(s)
- Xiu Wang
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou 310018, China and Nanhu College, Jiaxing University, Jiaxing 314001, China.
| | - Xiunan Kong
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou 310018, China
| | - Yumei Qin
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou 310018, China
| | - Xuan Zhu
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou 310018, China
| | - Daofeng Qu
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou 310018, China
| | - Jianzhong Han
- School of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou 310018, China
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Erazo AB, Wang N, Standke L, Semeniuk AD, Fülle L, Cengiz SC, Thiem M, Weighardt H, Strugnell RA, Förster I. CCL17-expressing dendritic cells in the intestine are preferentially infected by Salmonella but CCL17 plays a redundant role in systemic dissemination. IMMUNITY INFLAMMATION AND DISEASE 2021; 9:891-904. [PMID: 33945673 PMCID: PMC8342217 DOI: 10.1002/iid3.445] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 04/10/2021] [Accepted: 04/13/2021] [Indexed: 12/14/2022]
Abstract
Introduction Salmonella spp. are a recognized and global cause of serious health issues from gastroenteritis to invasive disease. The mouse model of human typhoid fever, which uses Salmonella enterica serovar Typhimurium (STM) in susceptible mouse strains, has revealed that the bacteria gain access to extraintestinal tissues from the gastrointestinal tract to cause severe systemic disease. Previous analysis of the immune responses against Salmonella spp. revealed the crucial role played by dendritic cells (DCs) in carrying STM from the intestinal mucosa to the mesenteric lymph nodes (mLNs), a key site for antigen presentation and T cell activation. In this study, we investigated the influence of chemokine CCL17 on the dissemination of STM. Methods WT, CCL17/EGFP reporter, or CCL17‐deficient mice were infected orally with STM (SL1344) or mCherry‐expressing STM for 1–3 days. Colocalization of STM with CCL17‐expressing DCs in Peyer's patches (PP) and mLN was analyzed by fluorescence microscopy. In addition, DCs and myeloid cell populations from naïve and Salmonella‐infected mice were analyzed by flow cytometry. Bacterial load was determined in PP, mLN, spleen, and liver 1 and 3 days after infection. Results Histological analysis revealed that CCL17‐expressing cells are located in close proximity to STM in the dome area of PP. We show that, in mLN, STM were preferentially located within CCL17+ rather than CCL17− DCs, besides other mononuclear phagocytes, and identified the CD103+ CD11b− DC subset as the main STM‐carrying DC population in the intestine. STM infection triggered upregulation of CCL17 expression in specific intestinal DC subsets in a tissue‐specific manner. The dissemination of STM from the gut to the mLN, however, was only moderately influenced by the presence of CCL17. Conclusion CCL17‐expressing DCs were preferentially infected by Salmonella in the intestine in comparison to other DC. Nevertheless, the production of CCL17 was not essential for the early dissemination of Salmonella from the gut to systemic organs.
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Affiliation(s)
- Anna B Erazo
- Immunology and Environment, Life and Medical Sciences (LIMES) Institute, University of Bonn, Bonn, Germany.,Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | - Nancy Wang
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | - Lena Standke
- Department for Innate Immunity and Metaflammation, Institute of Innate Immunity, University Hospital Bonn, Medical Faculty, Bonn, Germany
| | - Adrian D Semeniuk
- Immunology and Environment, Life and Medical Sciences (LIMES) Institute, University of Bonn, Bonn, Germany.,Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | - Lorenz Fülle
- Immunology and Environment, Life and Medical Sciences (LIMES) Institute, University of Bonn, Bonn, Germany
| | - Sevgi C Cengiz
- Immunology and Environment, Life and Medical Sciences (LIMES) Institute, University of Bonn, Bonn, Germany
| | - Manja Thiem
- Immunology and Environment, Life and Medical Sciences (LIMES) Institute, University of Bonn, Bonn, Germany
| | - Heike Weighardt
- Immunology and Environment, Life and Medical Sciences (LIMES) Institute, University of Bonn, Bonn, Germany
| | - Richard A Strugnell
- Department of Microbiology and Immunology, The University of Melbourne at the Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | - Irmgard Förster
- Immunology and Environment, Life and Medical Sciences (LIMES) Institute, University of Bonn, Bonn, Germany
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Raheem A, Liang L, Zhang G, Cui S. Modulatory Effects of Probiotics During Pathogenic Infections With Emphasis on Immune Regulation. Front Immunol 2021; 12:616713. [PMID: 33897683 PMCID: PMC8060567 DOI: 10.3389/fimmu.2021.616713] [Citation(s) in RCA: 58] [Impact Index Per Article: 19.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Accepted: 02/12/2021] [Indexed: 12/11/2022] Open
Abstract
In order to inhibit pathogenic complications and to enhance animal and poultry growth, antibiotics have been extensively used for many years. Antibiotics applications not only affect target pathogens but also intestinal beneficially microbes, inducing long-lasting changes in intestinal microbiota associated with diseases. The application of antibiotics also has many other side effects like, intestinal barrier dysfunction, antibiotics residues in foodstuffs, nephropathy, allergy, bone marrow toxicity, mutagenicity, reproductive disorders, hepatotoxicity carcinogenicity, and antibiotic-resistant bacteria, which greatly compromise the efficacy of antibiotics. Thus, the development of new antibiotics is necessary, while the search for antibiotic alternatives continues. Probiotics are considered the ideal antibiotic substitute; in recent years, probiotic research concerning their application during pathogenic infections in humans, aquaculture, poultry, and livestock industry, with emphasis on modulating the immune system of the host, has been attracting considerable interest. Hence, the adverse effects of antibiotics and remedial effects of probiotics during infectious diseases have become central points of focus among researchers. Probiotics are live microorganisms, and when given in adequate quantities, confer good health effects to the host through different mechanisms. Among them, the regulation of host immune response during pathogenic infections is one of the most important mechanisms. A number of studies have investigated different aspects of probiotics. In this review, we mainly summarize recent discoveries and discuss two important aspects: (1) the application of probiotics during pathogenic infections; and (2) their modulatory effects on the immune response of the host during infectious and non-infectious diseases.
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Affiliation(s)
- Abdul Raheem
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
- Scientific Observation and Experiment Station of Veterinary Drugs and Diagnostic Technology of Beijing, Ministry of Agriculture, Beijing, China
| | - Lin Liang
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
- Scientific Observation and Experiment Station of Veterinary Drugs and Diagnostic Technology of Beijing, Ministry of Agriculture, Beijing, China
| | - Guangzhi Zhang
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
- Scientific Observation and Experiment Station of Veterinary Drugs and Diagnostic Technology of Beijing, Ministry of Agriculture, Beijing, China
| | - Shangjin Cui
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing, China
- Scientific Observation and Experiment Station of Veterinary Drugs and Diagnostic Technology of Beijing, Ministry of Agriculture, Beijing, China
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24
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Ma PY, Tan JE, Hee EW, Yong DWX, Heng YS, Low WX, Wu XH, Cletus C, Kumar Chellappan D, Aung K, Yong CY, Liew YK. Human Genetic Variation Influences Enteric Fever Progression. Cells 2021; 10:cells10020345. [PMID: 33562108 PMCID: PMC7915608 DOI: 10.3390/cells10020345] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 02/02/2021] [Accepted: 02/04/2021] [Indexed: 01/06/2023] Open
Abstract
In the 21st century, enteric fever is still causing a significant number of mortalities, especially in high-risk regions of the world. Genetic studies involving the genome and transcriptome have revealed a broad set of candidate genetic polymorphisms associated with susceptibility to and the severity of enteric fever. This review attempted to explain and discuss the past and the most recent findings on human genetic variants affecting the progression of Salmonella typhoidal species infection, particularly toll-like receptor (TLR) 4, TLR5, interleukin (IL-) 4, natural resistance-associated macrophage protein 1 (NRAMP1), VAC14, PARK2/PACRG, cystic fibrosis transmembrane conductance regulator (CFTR), major-histocompatibility-complex (MHC) class II and class III. These polymorphisms on disease susceptibility or progression in patients could be related to multiple mechanisms in eliminating both intracellular and extracellular Salmonella typhoidal species. Here, we also highlighted the limitations in the studies reported, which led to inconclusive results in association studies. Nevertheless, the knowledge obtained through this review may shed some light on the development of risk prediction tools, novel therapies as well as strategies towards developing a personalised typhoid vaccine.
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Affiliation(s)
- Pei Yee Ma
- School of Postgraduate Studies, International Medical University, Bukit Jalil, Kuala Lumpur 57000, Malaysia;
| | - Jing En Tan
- School of Pharmacy, International Medical University, Kuala Lumpur 57000, Malaysia; (J.E.T.); (E.W.H.); (D.W.X.Y.); (Y.S.H.); (W.X.L.); (X.H.W.); (C.C.)
| | - Edd Wyn Hee
- School of Pharmacy, International Medical University, Kuala Lumpur 57000, Malaysia; (J.E.T.); (E.W.H.); (D.W.X.Y.); (Y.S.H.); (W.X.L.); (X.H.W.); (C.C.)
| | - Dylan Wang Xi Yong
- School of Pharmacy, International Medical University, Kuala Lumpur 57000, Malaysia; (J.E.T.); (E.W.H.); (D.W.X.Y.); (Y.S.H.); (W.X.L.); (X.H.W.); (C.C.)
| | - Yi Shuan Heng
- School of Pharmacy, International Medical University, Kuala Lumpur 57000, Malaysia; (J.E.T.); (E.W.H.); (D.W.X.Y.); (Y.S.H.); (W.X.L.); (X.H.W.); (C.C.)
| | - Wei Xiang Low
- School of Pharmacy, International Medical University, Kuala Lumpur 57000, Malaysia; (J.E.T.); (E.W.H.); (D.W.X.Y.); (Y.S.H.); (W.X.L.); (X.H.W.); (C.C.)
| | - Xun Hui Wu
- School of Pharmacy, International Medical University, Kuala Lumpur 57000, Malaysia; (J.E.T.); (E.W.H.); (D.W.X.Y.); (Y.S.H.); (W.X.L.); (X.H.W.); (C.C.)
| | - Christy Cletus
- School of Pharmacy, International Medical University, Kuala Lumpur 57000, Malaysia; (J.E.T.); (E.W.H.); (D.W.X.Y.); (Y.S.H.); (W.X.L.); (X.H.W.); (C.C.)
| | - Dinesh Kumar Chellappan
- Department of Life Sciences, International Medical University, Kuala Lumpur 57000, Malaysia;
| | - Kyan Aung
- Department of Pathology, International Medical University, Kuala Lumpur 57000, Malaysia;
| | - Chean Yeah Yong
- Department of Microbiology, Faculty of Biotechnology and Biomolecular Sciences, Universiti Putra Malaysia, Selangor 43400, Malaysia;
| | - Yun Khoon Liew
- Department of Life Sciences, International Medical University, Kuala Lumpur 57000, Malaysia;
- Correspondence:
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25
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Kagambèga A, Hiott LM, Boyle DS, McMillan EA, Sharma P, Gupta SK, Ramadan H, Cho S, Humayoun SB, Woodley TA, Barro N, Jackson CR, Frye JG. Serotyping of sub-Saharan Africa Salmonella strains isolated from poultry feces using multiplex PCR and whole genome sequencing. BMC Microbiol 2021; 21:29. [PMID: 33468047 PMCID: PMC7814607 DOI: 10.1186/s12866-021-02085-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Accepted: 01/01/2021] [Indexed: 11/30/2022] Open
Abstract
Background Salmonella enterica remains a leading cause of food-borne diseases worldwide. Serotype information is important in food safety and public health activities to reduce the burden of salmonellosis. In the current study, two methods were used to determine serotypes of 111 strains of Salmonella isolated from poultry feces in Burkina Faso. First, Salmonella Multiplex Assay for Rapid Typing (SMART) Polymerase Chain Reaction (PCR) was used to determine the serovars of the S. enterica isolates. Second, serovar prediction based on whole genome sequencing (WGS) data was performed using SeqSero 2.0. Results Among the 111 Salmonella isolates, serotypes for 17 (15.31%) isolates were identified based on comparison to a panel of representative SMART codes previously determined for the 50 most common serovars in the United States. Forty-four (44) new SMART codes were developed for common and uncommon serotypes. A total of 105 (94.59%) isolates were serotyped using SeqSero 2.0 for serovar prediction based on WGS data. Conclusion We determined that SeqSero 2.0 was more comprehensive for identifying Salmonella serotypes from Burkina Faso than SMART PCR.
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Affiliation(s)
- Assèta Kagambèga
- Bacterial Epidemiology and Antimicrobial Resistance Research Unit, U.S. National Poultry Research Center, USDA, ARS, Athens, GA, USA. .,Laboratoire de Biologie Moléculaire, d'épidémiologie et de surveillance des bactéries et virus transmissibles par les aliments (LaBESTA)/Ecole Doctorale Sciences et Technologies (EDST)/Université Joseph KI-ZERBO, Ouagadougou, Burkina Faso. .,Institut des Sciences, Ministère des enseignement supérieur, de la recherche scientifique et de l'innovation, Ouagadougou, Burkina Faso.
| | - Lari M Hiott
- Bacterial Epidemiology and Antimicrobial Resistance Research Unit, U.S. National Poultry Research Center, USDA, ARS, Athens, GA, USA
| | | | - Elizabeth A McMillan
- Bacterial Epidemiology and Antimicrobial Resistance Research Unit, U.S. National Poultry Research Center, USDA, ARS, Athens, GA, USA
| | - Poonam Sharma
- Bacterial Epidemiology and Antimicrobial Resistance Research Unit, U.S. National Poultry Research Center, USDA, ARS, Athens, GA, USA
| | - Sushim K Gupta
- Bacterial Epidemiology and Antimicrobial Resistance Research Unit, U.S. National Poultry Research Center, USDA, ARS, Athens, GA, USA
| | - Hazem Ramadan
- Bacterial Epidemiology and Antimicrobial Resistance Research Unit, U.S. National Poultry Research Center, USDA, ARS, Athens, GA, USA.,Hygiene and Zoonoses Department, Faculty of Veterinary medicine, Mansoura University, Mansoura, 35516, Egypt
| | - Sohyun Cho
- Bacterial Epidemiology and Antimicrobial Resistance Research Unit, U.S. National Poultry Research Center, USDA, ARS, Athens, GA, USA
| | - Shaheen B Humayoun
- Bacterial Epidemiology and Antimicrobial Resistance Research Unit, U.S. National Poultry Research Center, USDA, ARS, Athens, GA, USA
| | - Tiffanie A Woodley
- Bacterial Epidemiology and Antimicrobial Resistance Research Unit, U.S. National Poultry Research Center, USDA, ARS, Athens, GA, USA
| | - Nicolas Barro
- Laboratoire de Biologie Moléculaire, d'épidémiologie et de surveillance des bactéries et virus transmissibles par les aliments (LaBESTA)/Ecole Doctorale Sciences et Technologies (EDST)/Université Joseph KI-ZERBO, Ouagadougou, Burkina Faso
| | - Charlene R Jackson
- Bacterial Epidemiology and Antimicrobial Resistance Research Unit, U.S. National Poultry Research Center, USDA, ARS, Athens, GA, USA
| | - Jonathan G Frye
- Bacterial Epidemiology and Antimicrobial Resistance Research Unit, U.S. National Poultry Research Center, USDA, ARS, Athens, GA, USA
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26
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Liu N, Zhao FY, Xu XJ. Hemophagocytic lymphohistiocytosis caused by STAT1 gain-of-function mutation is not driven by interferon-γ: A case report. World J Clin Cases 2020; 8:6130-6135. [PMID: 33344614 PMCID: PMC7723692 DOI: 10.12998/wjcc.v8.i23.6130] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Revised: 10/13/2020] [Accepted: 10/26/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Hemophagocytic lymphohistiocytosis (HLH) is a life-threatening hyper-inflammatory syndrome caused by many genetic defects. STAT1 is a DNA-binding factor that regulates gene transcription. HLH caused by STAT1 gain-of-function (GOF) mutations has rarely been reported and its clinical manifestations and mechanisms are not clearly defined.
CASE SUMMARY A 2-year-old boy presented to our hospital with recurrent fever for > 20 d. The patient had a personal history of persistent oral candidiasis and inoculation site infection during the past 2 years. Hepatosplenomegaly was noted. Complete blood cell count showed severe anemia, thrombocytopenia and neutropenia. Other laboratory tests showed liver dysfunction, hypertriglyceridemia and decreased fibrinogen. Hemophagocytosis was found in the bone marrow. Chest computed tomography showed a cavitary lesion. Tests for fungal infection were positive. Serum T helper (Th) 1/Th2 cytokine determination demonstrated moderately elevated levels of interleukin (IL)-6 and IL-10 with normal interferon (IFN)-γ concentration. Mycobacterium bovis was identified in bronchoalveolar lavage fluid by polymerase chain reaction. Genetic testing identified a heterozygous mutation of c.1154C>T causing a T385M amino acid substitution in STAT1. Despite antibacterial and antifungal therapy, the febrile disease was not controlled. The signs of HLH were relieved after HLH-94 protocol administration, except fever. Fever was not resolved until he received anti-tuberculosis therapy. Hematopoietic stem cell transplantation was refused and the patient died six months later due to severe pneumonia.
CONCLUSION Patients with STAT1 GOF mutation have broad clinical manifestations and may develop HLH. This form of HLH presents with normal IFN-γ level without cytokine storm.
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Affiliation(s)
- Nan Liu
- Department of Hematology-oncology, Children’s Hospital, Zhejiang University School of Medicine, Hangzhou 310003, Zhejiang Province, China
| | - Fen-Ying Zhao
- Department of Hematology-oncology, Children’s Hospital, Zhejiang University School of Medicine, Hangzhou 310003, Zhejiang Province, China
| | - Xiao-Jun Xu
- Department of Hematology-oncology, Children’s Hospital, Zhejiang University School of Medicine, Hangzhou 310003, Zhejiang Province, China
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27
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Liu N, Zhao FY, Xu XJ. Hemophagocytic lymphohistiocytosis caused by STAT1 gain-of-function mutation is not driven by interferon-γ: A case report. World J Clin Cases 2020. [DOI: 10.12998/wjcc.v8.i23.6123] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
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28
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Piccini G, Montomoli E. Pathogenic signature of invasive non-typhoidal Salmonella in Africa: implications for vaccine development. Hum Vaccin Immunother 2020; 16:2056-2071. [PMID: 32692622 PMCID: PMC7553687 DOI: 10.1080/21645515.2020.1785791] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
Invasive non-typhoidal Salmonella (iNTS) infections are a leading cause of bacteremia in Sub-Saharan Africa (sSA), thereby representing a major public health threat. Salmonella Typhimurium clade ST313 and Salmonella Enteriditis lineages associated with Western and Central/Eastern Africa are among the iNTS serovars which are of the greatest concern due to their case-fatality rate, especially in children and in the immunocompromised population. Identification of pathogen-associated features and host susceptibility factors that increase the risk for invasive non-typhoidal salmonellosis would be instrumental for the design of targeted prevention strategies, which are urgently needed given the increasing spread of multidrug-resistant iNTS in Africa. This review summarizes current knowledge of bacterial traits and host immune responses associated with iNTS infections in sSA, then discusses how this knowledge can guide vaccine development while providing a summary of vaccine candidates in preclinical and early clinical development.
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Affiliation(s)
| | - Emanuele Montomoli
- VisMederi srl , Siena, Italy.,Department of Molecular and Developmental Medicine, University of Siena , Siena, Italy
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29
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A Loss-of-Function Mutation in the Integrin Alpha L ( Itgal) Gene Contributes to Susceptibility to Salmonella enterica Serovar Typhimurium Infection in Collaborative Cross Strain CC042. Infect Immun 2019; 88:IAI.00656-19. [PMID: 31636138 DOI: 10.1128/iai.00656-19] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Accepted: 10/05/2019] [Indexed: 12/18/2022] Open
Abstract
Salmonella is an intracellular bacterium found in the gastrointestinal tract of mammalian, avian, and reptilian hosts. Mouse models have been extensively used to model in vivo distinct aspects of human Salmonella infections and have led to the identification of several host susceptibility genes. We have investigated the susceptibility of Collaborative Cross strains to intravenous infection with Salmonella enterica serovar Typhimurium as a model of human systemic invasive infection. In this model, strain CC042/GeniUnc (CC042) mice displayed extreme susceptibility with very high bacterial loads and mortality. CC042 mice showed lower spleen weights and decreased splenocyte numbers before and after infection, affecting mostly CD8+ T cells, B cells, and all myeloid cell populations, compared with control C57BL/6J mice. CC042 mice also had lower thymus weights with a reduced total number of thymocytes and double-negative and double-positive (CD4+, CD8+) thymocytes compared to C57BL/6J mice. Analysis of bone marrow-resident hematopoietic progenitors showed a strong bias against lymphoid-primed multipotent progenitors. An F2 cross between CC042 and C57BL/6N mice identified two loci on chromosome 7 (Stsl6 and Stsl7) associated with differences in bacterial loads. In the Stsl7 region, CC042 carried a loss-of-function variant, unique to this strain, in the integrin alpha L (Itgal) gene, the causative role of which was confirmed by a quantitative complementation test. Notably, Itgal loss of function increased the susceptibility to S. Typhimurium in a (C57BL/6J × CC042)F1 mouse background but not in a C57BL/6J mouse inbred background. These results further emphasize the utility of the Collaborative Cross to identify new host genetic variants controlling susceptibility to infections and improve our understanding of the function of the Itgal gene.
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30
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Stress-induced adaptations in Salmonella: A ground for shaping its pathogenesis. Microbiol Res 2019; 229:126311. [DOI: 10.1016/j.micres.2019.126311] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2019] [Revised: 08/01/2019] [Accepted: 08/06/2019] [Indexed: 12/12/2022]
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Unexpected Role of CD8 T Cells in Accelerated Clearance of Salmonella enterica Serovar Typhimurium from H-2 Congenic mice. Infect Immun 2019; 87:IAI.00588-19. [PMID: 31427450 DOI: 10.1128/iai.00588-19] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Accepted: 07/31/2019] [Indexed: 12/21/2022] Open
Abstract
Salmonella infection can cause gastroenteritis in healthy individuals or a serious, systemic infection in immunocompromised patients and has a global impact. CD4 Th1 cells represent the main lymphocyte population that participates in bacterial clearance during both primary and secondary infections in mice of the H-2b haplotype. Previous studies have used congenic mice to examine the function of major histocompatibility complex (MHC) molecules in elimination of this pathogen from the host. In this study, we further characterized the ability of H-2b, H-2k, and H-2u molecules to influence adaptive immunity to Salmonella in MHC congenic mice. By depleting different cell populations during infection, we unexpectedly found that CD8 T cells, in addition to CD4 T cells, play a major role in accelerated clearance of bacteria from H-2k congenic hosts. Our data suggest that CD8 T cells accelerate clearance in some MHC congenic mouse strains and could therefore represent an unexpected contributor to the protective efficacy of Salmonella vaccines outside the typical studies in C57BL/6 mice.
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32
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Wild AB, Krzyzak L, Peckert K, Stich L, Kuhnt C, Butterhof A, Seitz C, Mattner J, Grüner N, Gänsbauer M, Purtak M, Soulat D, Winkler TH, Nitschke L, Zinser E, Steinkasserer A. CD83 orchestrates immunity toward self and non-self in dendritic cells. JCI Insight 2019; 4:126246. [PMID: 31527313 PMCID: PMC6824307 DOI: 10.1172/jci.insight.126246] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2018] [Accepted: 09/04/2019] [Indexed: 01/22/2023] Open
Abstract
Dendritic cells (DCs) are crucial to balance protective immunity and autoimmune inflammatory processes. Expression of CD83 is a well-established marker for mature DCs, although its physiological role is still not completely understood. Using a DC-specific CD83-conditional KO (CD83ΔDC) mouse, we provide new insights into the function of CD83 within this cell type. Interestingly, CD83-deficient DCs produced drastically increased IL-2 levels and displayed higher expression of the costimulatory molecules CD25 and OX40L, which causes superior induction of antigen-specific T cell responses and compromises Treg suppressive functions. This also directly translates into accelerated immune responses in vivo. Upon Salmonella typhimurium and Listeria monocytogenes infection, CD83ΔDC mice cleared both pathogens more efficiently, and CD83-deficient DCs expressed increased IL-12 levels after bacterial encounter. Using the experimental autoimmune encephalomyelitis model, autoimmune inflammation was dramatically aggravated in CD83ΔDC mice while resolution of inflammation was strongly reduced. This phenotype was associated with increased cell influx into the CNS accompanied by elevated Th17 cell numbers. Concomitantly, CD83ΔDC mice had reduced Treg numbers in peripheral lymphoid organs. In summary, we show that CD83 ablation on DCs results in enhanced immune responses by dysregulating tolerance mechanisms and thereby impairing resolution of inflammation, which also demonstrates high clinical relevance.
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Affiliation(s)
| | | | | | | | | | | | | | - Jochen Mattner
- Institute of Microbiology — Clinical Microbiology, Immunology and Hygiene, Universitätsklinikum Erlangen and Friedrich-Alexander Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Niklas Grüner
- Institute of Microbiology — Clinical Microbiology, Immunology and Hygiene, Universitätsklinikum Erlangen and Friedrich-Alexander Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Maximilian Gänsbauer
- Institute of Microbiology — Clinical Microbiology, Immunology and Hygiene, Universitätsklinikum Erlangen and Friedrich-Alexander Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Martin Purtak
- Institute of Microbiology — Clinical Microbiology, Immunology and Hygiene, Universitätsklinikum Erlangen and Friedrich-Alexander Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Didier Soulat
- Institute of Microbiology — Clinical Microbiology, Immunology and Hygiene, Universitätsklinikum Erlangen and Friedrich-Alexander Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Thomas H. Winkler
- Division of Genetics, Department of Biology, Friedrich-Alexander Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Lars Nitschke
- Division of Genetics, Department of Biology, Friedrich-Alexander Universität Erlangen-Nürnberg, Erlangen, Germany
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Antonia AL, Gibbs KD, Trahair ED, Pittman KJ, Martin AT, Schott BH, Smith JS, Rajagopal S, Thompson JW, Reinhardt RL, Ko DC. Pathogen Evasion of Chemokine Response Through Suppression of CXCL10. Front Cell Infect Microbiol 2019; 9:280. [PMID: 31440475 PMCID: PMC6693555 DOI: 10.3389/fcimb.2019.00280] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2019] [Accepted: 07/23/2019] [Indexed: 01/10/2023] Open
Abstract
Clearance of intracellular pathogens, such as Leishmania (L.) major, depends on an immune response with well-regulated cytokine signaling. Here we describe a pathogen-mediated mechanism of evading CXCL10, a chemokine with diverse antimicrobial functions, including T cell recruitment. Infection with L. major in a human monocyte cell line induced robust CXCL10 transcription without increasing extracellular CXCL10 protein concentrations. We found that this transcriptionally independent suppression of CXCL10 is mediated by the virulence factor and protease, glycoprotein-63 (gp63). Specifically, GP63 cleaves CXCL10 after amino acid A81 at the base of a C-terminal alpha-helix. Cytokine cleavage by GP63 demonstrated specificity, as GP63 cleaved CXCL10 and its homologs, which all bind the CXCR3 receptor, but not distantly related chemokines, such as CXCL8 and CCL22. Further characterization demonstrated that CXCL10 cleavage activity by GP63 was produced by both extracellular promastigotes and intracellular amastigotes. Crucially, CXCL10 cleavage impaired T cell chemotaxis in vitro, indicating that cleaved CXCL10 cannot signal through CXCR3. Ultimately, we propose CXCL10 suppression is a convergent mechanism of immune evasion, as Salmonella enterica and Chlamydia trachomatis also suppress CXCL10. This commonality suggests that counteracting CXCL10 suppression may provide a generalizable therapeutic strategy against intracellular pathogens. Importance Leishmaniasis, an infectious disease that annually affects over one million people, is caused by intracellular parasites that have evolved to evade the host's attempts to eliminate the parasite. Cutaneous leishmaniasis results in disfiguring skin lesions if the host immune system does not appropriately respond to infection. A family of molecules called chemokines coordinate recruitment of the immune cells required to eliminate infection. Here, we demonstrate a novel mechanism that Leishmania (L.) spp. employ to suppress host chemokines: a Leishmania-encoded protease cleaves chemokines known to recruit T cells that fight off infection. We observe that other common human intracellular pathogens, including Chlamydia trachomatis and Salmonella enterica, reduce levels of the same chemokines, suggesting a strong selective pressure to avoid this component of the immune response. Our study provides new insights into how intracellular pathogens interact with the host immune response to enhance pathogen survival.
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Affiliation(s)
- Alejandro L. Antonia
- Department of Molecular Genetics and Microbiology, School of Medicine, Duke University, Durham, NC, United States
| | - Kyle D. Gibbs
- Department of Molecular Genetics and Microbiology, School of Medicine, Duke University, Durham, NC, United States
| | - Esme D. Trahair
- Department of Molecular Genetics and Microbiology, School of Medicine, Duke University, Durham, NC, United States
| | - Kelly J. Pittman
- Department of Molecular Genetics and Microbiology, School of Medicine, Duke University, Durham, NC, United States
| | - Amelia T. Martin
- Department of Molecular Genetics and Microbiology, School of Medicine, Duke University, Durham, NC, United States
| | - Benjamin H. Schott
- Department of Molecular Genetics and Microbiology, School of Medicine, Duke University, Durham, NC, United States
| | - Jeffrey S. Smith
- Department of Biochemistry, School of Medicine, Duke University, Durham, NC, United States
| | - Sudarshan Rajagopal
- Department of Biochemistry, School of Medicine, Duke University, Durham, NC, United States
- Division of Cardiology, Department of Medicine, School of Medicine, Duke University, Durham, NC, United States
| | - J. Will Thompson
- Proteomics and Metabolomics Shared Resource, Center for Genomics and Computational Biology, School of Medicine, Duke University, Durham, NC, United States
| | - Richard Lee Reinhardt
- Department of Biomedical Research, National Jewish Health, Denver, CO, United States
- Department of Immunology and Microbiology, University of Colorado Anschutz Medical Campus, Aurora, CO, United States
| | - Dennis C. Ko
- Department of Molecular Genetics and Microbiology, School of Medicine, Duke University, Durham, NC, United States
- Division of Infectious Diseases, Department of Medicine, School of Medicine, Duke University, Durham, NC, United States
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Potential Involvement of Salmonella Infection in Autoimmunity. Pathogens 2019; 8:pathogens8030096. [PMID: 31277323 PMCID: PMC6789781 DOI: 10.3390/pathogens8030096] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2019] [Revised: 06/27/2019] [Accepted: 06/29/2019] [Indexed: 01/24/2023] Open
Abstract
In this work, we investigated the potential effects of nontyphoidal Salmonella infection on autoantibody (AA) formation. The titer and profiles of autoantibodies in the sera of patients with acute salmonellosis due to Salmonella enterica serovar Typhimurium (S. Typhimurium) or Salmonella enterica serovar Enteritidis (S. Enteritidis) infection, as well as in convalescent patients, were determined with indirect immunofluorescence. A significant increase of autoantibodies in acute diseases caused by both serotypes of Salmonella and during post infection by S. Enteritidis was detected. Antibody profile analysis by multivariate statistics revealed that this increase was non-specific and was not dependent on the infectious agent or disease stage. The results obtained suggest that nontyphoidal Salmonella infection contributes to the generation of autoantibodies and may play a role in autoimmune disease.
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Cheng RA, Eade CR, Wiedmann M. Embracing Diversity: Differences in Virulence Mechanisms, Disease Severity, and Host Adaptations Contribute to the Success of Nontyphoidal Salmonella as a Foodborne Pathogen. Front Microbiol 2019; 10:1368. [PMID: 31316476 PMCID: PMC6611429 DOI: 10.3389/fmicb.2019.01368] [Citation(s) in RCA: 93] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Accepted: 05/31/2019] [Indexed: 12/19/2022] Open
Abstract
Not all Salmonella enterica serovars cause the same disease. S. enterica represents an incredibly diverse species comprising >2,600 unique serovars. While some S. enterica serovars are host-restricted, others infect a wide range of hosts. The diseases that nontyphoidal Salmonella (NTS) serovars cause vary considerably, with some serovars being significantly more likely to cause invasive disease in humans than others. Furthermore, while genomic analyses have advanced our understanding of the genetic diversity of these serovars, they have not been able to fully account for the observed clinical differences. One overarching challenge is that much of what is known about Salmonella's general biology and virulence strategies is concluded from studies examining a select few serovars, especially serovar Typhimurium. As targeted control strategies have been implemented to control select serovars, an increasing number of foodborne outbreaks involving serovars that are less frequently associated with human clinical illness are being detected. Harnessing what is known about the diversity of NTS serovars represents an important factor in achieving the ultimate goal of reducing salmonellosis-associated morbidity and mortality worldwide. In this review we summarize the current understanding of the differences and similarities among NTS serovars, highlighting the virulence mechanisms, genetic differences, and sources that characterize S. enterica diversity and contribute to its success as a foodborne pathogen.
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Affiliation(s)
- Rachel A. Cheng
- Department of Food Science, Cornell University, Ithaca, NY, United States
| | - Colleen R. Eade
- Department of Population Medicine and Diagnostic Sciences, Cornell University, Ithaca, NY, United States
- Department of Chemistry, University of North Carolina at Charlotte, Charlotte, NC, United States
| | - Martin Wiedmann
- Department of Food Science, Cornell University, Ithaca, NY, United States
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Aldrich C, Hartman H, Feasey N, Chattaway MA, Dekker D, Al-Emran HM, Larkin L, McCormick J, Sarpong N, Le Hello S, Adu-Sarkodie Y, Panzner U, Park SE, Im J, Marks F, May J, Dallman TJ, Eibach D. Emergence of phylogenetically diverse and fluoroquinolone resistant Salmonella Enteritidis as a cause of invasive nontyphoidal Salmonella disease in Ghana. PLoS Negl Trop Dis 2019; 13:e0007485. [PMID: 31220112 PMCID: PMC6605661 DOI: 10.1371/journal.pntd.0007485] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2019] [Revised: 07/02/2019] [Accepted: 05/22/2019] [Indexed: 02/03/2023] Open
Abstract
BACKGROUND Salmonella enterica serovar Enteritidis is a cause of both poultry- and egg-associated enterocolitis globally and bloodstream-invasive nontyphoidal Salmonella (iNTS) disease in sub-Saharan Africa (sSA). Distinct, multi-drug resistant genotypes associated with iNTS disease in sSA have recently been described, often requiring treatment with fluoroquinolone antibiotics. In industrialised countries, antimicrobial use in poultry production has led to frequent fluoroquinolone resistance amongst globally prevalent enterocolitis-associated lineages. METHODOLOGY/PRINCIPAL FINDINGS Twenty seven S. Enteritidis isolates from patients with iNTS disease and two poultry isolates, collected between 2007 and 2015 in the Ashanti region of Ghana, were whole-genome sequenced. These isolates, notable for a high rate of diminished ciprofloxacin susceptibility (DCS), were placed in the phyletic context of 1,067 sequences from the Public Health England (PHE) S. Enteritidis genome database to understand whether DCS was associated with African or globally-circulating clades of S. Enteritidis. Analysis showed four of the major S. Enteritidis clades were represented, two global and two African. All thirteen DCS isolates, containing a single gyrA mutation at codon 87, belonged to a global PT4-like clade responsible for epidemics of poultry-associated enterocolitis. Apart from two DCS isolates, which clustered with PHE isolates associated with travel to Spain and Brazil, the remaining DCS isolates, including one poultry isolate, belonged to two monophyletic clusters in which gyrA 87 mutations appear to have developed within the region. CONCLUSIONS/SIGNIFICANCE Extensive phylogenetic diversity is evident amongst iNTS disease-associated S. Enteritidis in Ghana. Antimicrobial resistance profiles differed by clade, highlighting the challenges of devising empirical sepsis guidelines. The detection of fluoroquinolone resistance in phyletically-related poultry and human isolates is of major concern and surveillance and control measures within the region's burgeoning poultry industry are required to protect a human population at high risk of iNTS disease.
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Affiliation(s)
- Cassandra Aldrich
- Department of Infectious Disease Epidemiology, Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
- Division of Infectious Diseases and Tropical Medicine, Medical Center of the University of Munich (LMU), Munich, Germany
| | - Hassan Hartman
- National Infections Service, Public Health England, Colindale, United Kingdom
| | - Nicholas Feasey
- Liverpool School of Tropical Medicine, Liverpool, United Kingdom
- Wellcome Trust Sanger Institute, Cambridge, United Kingdom
| | | | - Denise Dekker
- Department of Infectious Disease Epidemiology, Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
- German Centre for Infection Research (DZIF), Hamburg-Borstel-Luebeck, Germany
| | - Hassan M. Al-Emran
- Department of Infectious Disease Epidemiology, Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
- Jessore University of Science and Technology, Jessore, Bangladesh
| | - Lesley Larkin
- National Infections Service, Public Health England, Colindale, United Kingdom
| | - Jacquelyn McCormick
- National Infections Service, Public Health England, Colindale, United Kingdom
| | - Nimako Sarpong
- Kumasi Centre for Collaborative Research in Tropical Medicine (KCCR), Kumasi, Ghana
| | - Simon Le Hello
- Institut Pasteur, French National Reference Center for Escherichia coli, Shigella and Salmonella, Paris, France
| | - Yaw Adu-Sarkodie
- Department of Clinical Microbiology, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana
| | - Ursula Panzner
- International Vaccine Institute, Seoul, Republic of Korea
| | - Se Eun Park
- International Vaccine Institute, Seoul, Republic of Korea
- Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam
| | - Justin Im
- International Vaccine Institute, Seoul, Republic of Korea
| | - Florian Marks
- International Vaccine Institute, Seoul, Republic of Korea
- Department of Medicine, University of Cambridge, Cambridge, United Kingdom
| | - Jürgen May
- Department of Infectious Disease Epidemiology, Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
- German Centre for Infection Research (DZIF), Hamburg-Borstel-Luebeck, Germany
| | - Timothy J. Dallman
- National Infections Service, Public Health England, Colindale, United Kingdom
| | - Daniel Eibach
- Department of Infectious Disease Epidemiology, Bernhard Nocht Institute for Tropical Medicine, Hamburg, Germany
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Zhang W, Wu Q, Zhu Y, Yang G, Yu J, Wang J, Ji H. Probiotic Lactobacillus rhamnosus GG Induces Alterations in Ileal Microbiota With Associated CD3 -CD19 -T-bet +IFNγ +/- Cell Subset Homeostasis in Pigs Challenged With Salmonella enterica Serovar 4,[5],12:i:. Front Microbiol 2019; 10:977. [PMID: 31134022 PMCID: PMC6516042 DOI: 10.3389/fmicb.2019.00977] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2018] [Accepted: 04/18/2019] [Indexed: 12/18/2022] Open
Abstract
Salmonella enterica serovar 4,[5],12:i:- (S. 4,[5],12:i:-) is an emerging foodborne pathogen causing salmonellosis in humans and animals. Probiotic Lactobacillus rhamnosus GG (LGG) is an effective strategy for controlling enteric infections through maintaining gut microbiota homeostasis and regulating the intestinal innate immune response. Here, LGG was orally administrated to newly weaned piglets for 1 week before S. 4,[5],12:i:- challenge. S. 4,[5],12:i:- challenge led to disturbed gut microbiota, characterized by increased levels of Psychrobacter, Chryseobacterium indoltheticum, and uncultured Corynebacteriaceae populations, as well as an aberrant correlation network in Prevotellaceae NK3B31 group-centric species. The beneficial effect of LGG correlated with attenuating the expansion of Prevotellaceae NK3B31 group. Fusobacterium only found in the pigs treated with LGG was positively correlated with Lactobacillus animalis and Propionibacterium. Administration of LGG induced the expansion of CD3-CD19-T-bet+IFNγ+ and CD3-CD19-T-bet+IFNγ- cell subsets in the peripheral blood at 24 h after a challenge of S. 4,[5],12:i:-. S. 4,[5],12:i:- infection increased the population of intraepithelial CD3-CD19-T-bet+IFNγ+ and CD3-CD19-T-bet+IFNγ- cells in the ileum; however, this increase was attenuated via LGG administration. Correlation analysis revealed that LGG enriched Flavobacterium frigidarium and Facklamia populations, which were negatively correlated with intraepithelial CD3-CD19-T-bet+IFNγ+ and CD3-CD19-T-bet+IFNγ- cells in the ileum. The present data suggest that probiotic LGG alters gut microbiota with associated CD3-CD19-T-bet+IFNγ+/- cell subset homeostasis in pigs challenged with S. enterica 4,[5],12:i:-. LGG may be used in potential gut microbiota-targeted therapy regimens to regulate the specific immune cell function and, consequently, control enteric infections.
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Affiliation(s)
- Wei Zhang
- Institute of Animal Husbandry and Veterinary Medicine, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
| | - Qiong Wu
- Animal Science and Technology College, Beijing University of Agriculture, Beijing, China
| | - Yaohong Zhu
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Guiyan Yang
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Jiao Yu
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Jiufeng Wang
- Department of Veterinary Clinical Sciences, College of Veterinary Medicine, China Agricultural University, Beijing, China
| | - Haifeng Ji
- Institute of Animal Husbandry and Veterinary Medicine, Beijing Academy of Agriculture and Forestry Sciences, Beijing, China
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Behzadi P, Behzadi E, Pawlak-Adamska EA. Urinary tract infections (UTIs) or genital tract infections (GTIs)? It's the diagnostics that count. GMS HYGIENE AND INFECTION CONTROL 2019; 14:Doc14. [PMID: 30993060 PMCID: PMC6449866 DOI: 10.3205/dgkh000320] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Urinary tract infections (UTIs) and genital tract infections (GTIs) are both very common infectious diseases. Thus, accuracy and rapidity in recognition and treatment of sexually transmitted urogenital tract infections (ST-UGTIs) is a major concern in global public health systems. The application of reliable, accurate diagnostic tools is the key to definite detection, identification and treatment. This literature review focused on different characteristics of UGTIs in patients and the importance of diagnostic methodologies. The articles published and indexed from 1980 through October 2018 in the databases of PubMed and MEDLINE, as well as the Google Scholar web search engine, were collected and studied. MeSH keywords of “Sexual intercourse”, “Urinary Tract Infections”, “Genital Tract Infections” and “Toll-Like Receptors” were used for searching articles. Then, the proper articles (original and review articles) were subjected to a very rigorous selection process. The clinical symptoms and signs or asymptomatic properties of UTIs and GTIs are similar and often overlap. In many cases, the lack of suitable diagnostic techniques leads to misdiagnosed/undignosed GTIs and overdiagnosed UTIs. The outcome of poor diagnostics is failure of definite identification and treatment. The application of advanced techniques comprising PCR, microarray and next-generation sequencing promises to be more effective, together with the use of the microbial pattern of the individual’s UGT to provide reliable detection, identification and definite treatment. This will be an option in the near future.
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Affiliation(s)
- Payam Behzadi
- Department of Microbiology, College of Basic Sciences, Shahr-e-Qods Branch, Islamic Azad University, Tehran, Iran
| | - Elham Behzadi
- Department of Microbiology, College of Basic Sciences, Shahr-e-Qods Branch, Islamic Azad University, Tehran, Iran
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Le Thi Phuong T, Rattanavong S, Vongsouvath M, Davong V, Phu Huong Lan N, Campbell JI, Darton TC, Thwaites GE, Newton PN, Dance DAB, Baker S. Non-typhoidal Salmonella serovars associated with invasive and non-invasive disease in the Lao People's Democratic Republic. Trans R Soc Trop Med Hyg 2019; 111:418-424. [PMID: 29342283 PMCID: PMC5914354 DOI: 10.1093/trstmh/trx076] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2017] [Accepted: 12/08/2017] [Indexed: 12/04/2022] Open
Abstract
Background Invasive non-typhoidal Salmonella (iNTS) disease is a well-described cause of mortality in children and human immunodeficiency virus (HIV)-infected adults in sub-Saharan Africa. Additionally, there is an ill-defined burden of iNTS disease in Southeast Asia. Methods Aiming to investigate the causative serovars of non-invasive and iNTS disease and their associated antimicrobial susceptibility profiles in the Lao People’s Democratic Republic, we performed multilocus sequence typing and antimicrobial susceptibility profiling on 168 NTS (63 blood and 105 faecal) organisms isolated in Lao between 2000 and 2012. Results Six different serovars were isolated from blood; Salmonella enterica serovar Enteritidis (n=28), S. enterica serovar Typhimurium (n=19) and S. enterica serovar Choleraesuis (n=11) accounted for >90% (58/63) of the iNTS disease cases. In contrast, the isolates from diarrhoeal faeces were comprised of 18 different serovars, the mostly commonly identified being S. enterica Typhimurium (n=28), S. enterica Weltevreden (n=14) and S. enterica Stanley (n=15). S. enterica Enteritidis and S. enterica Choleraesuis were significantly more associated with systemic disease than diarrhoeal disease in this patient group (p<0.001). Conclusions We find a differing distribution of Salmonella sequence types/serovars between those causing iNTS disease and non-invasive disease in Lao. We conclude that there is a small but not insignificant burden of iNTS disease in Lao. Further clinical and epidemiological investigations are required to assess mortality and the role of comorbidities such as HIV.
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Affiliation(s)
- Tu Le Thi Phuong
- Hospital for Tropical Diseases, Wellcome Trust Major Overseas Programme, Oxford University Clinical Research Unit, 764 Vo Van Kiet, Quan 5, Ho Chi Minh City, Vietnam
| | - Sayaphet Rattanavong
- Lao-Oxford-Mahosot Hospital-Wellcome Trust Research Unit (LOMWRU), Microbiology Laboratory, Mahosot Hospital, Vientiane Capital, Lao People's Democratic Republic
| | - Manivanh Vongsouvath
- Lao-Oxford-Mahosot Hospital-Wellcome Trust Research Unit (LOMWRU), Microbiology Laboratory, Mahosot Hospital, Vientiane Capital, Lao People's Democratic Republic
| | - Viengmon Davong
- Lao-Oxford-Mahosot Hospital-Wellcome Trust Research Unit (LOMWRU), Microbiology Laboratory, Mahosot Hospital, Vientiane Capital, Lao People's Democratic Republic
| | - Nguyen Phu Huong Lan
- Hospital for Tropical Diseases, Wellcome Trust Major Overseas Programme, Oxford University Clinical Research Unit, 764 Vo Van Kiet, Quan 5, Ho Chi Minh City, Vietnam.,Hospital for Tropical Diseases, Ho Chi Minh City, Vietnam
| | - James I Campbell
- Hospital for Tropical Diseases, Wellcome Trust Major Overseas Programme, Oxford University Clinical Research Unit, 764 Vo Van Kiet, Quan 5, Ho Chi Minh City, Vietnam.,Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, Old Road Campus, University of Oxford, Oxford, UK
| | - Thomas C Darton
- Hospital for Tropical Diseases, Wellcome Trust Major Overseas Programme, Oxford University Clinical Research Unit, 764 Vo Van Kiet, Quan 5, Ho Chi Minh City, Vietnam.,Department of Infection, Immunity and Cardiovascular Disease, University of Sheffield Medical School, Sheffield, UK
| | - Guy E Thwaites
- Hospital for Tropical Diseases, Wellcome Trust Major Overseas Programme, Oxford University Clinical Research Unit, 764 Vo Van Kiet, Quan 5, Ho Chi Minh City, Vietnam.,Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, Old Road Campus, University of Oxford, Oxford, UK
| | - Paul N Newton
- Lao-Oxford-Mahosot Hospital-Wellcome Trust Research Unit (LOMWRU), Microbiology Laboratory, Mahosot Hospital, Vientiane Capital, Lao People's Democratic Republic.,Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, Old Road Campus, University of Oxford, Oxford, UK
| | - David A B Dance
- Lao-Oxford-Mahosot Hospital-Wellcome Trust Research Unit (LOMWRU), Microbiology Laboratory, Mahosot Hospital, Vientiane Capital, Lao People's Democratic Republic.,Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, Old Road Campus, University of Oxford, Oxford, UK.,Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, UK
| | - Stephen Baker
- Hospital for Tropical Diseases, Wellcome Trust Major Overseas Programme, Oxford University Clinical Research Unit, 764 Vo Van Kiet, Quan 5, Ho Chi Minh City, Vietnam.,Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, Old Road Campus, University of Oxford, Oxford, UK.,Department of Medicine, University of Cambridge, Cambridge, UK
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Abstract
Nontyphoidal salmonellae (NTS) are a major cause of invasive (iNTS) disease in sub-Saharan Africa, manifesting as bacteremia and meningitis. Available epidemiological data indicate that iNTS disease is endemic in much of the region. Antimicrobial resistance is common and case fatality rates are high. There are well-characterized clinical associations with iNTS disease, including young age, HIV infection, malaria, malnutrition, anemia, and sickle cell disease. However, the clinical presentation of iNTS disease is often with fever alone, so clinical diagnosis is impossible without blood culture confirmation. No vaccine is currently available, making this a priority area for global health research. Over the past ten years, it has emerged that iNTS disease in Africa is caused by distinct pathovars of Salmonella Typhimurium, belonging to sequence type ST313, and Salmonella Enteritidis. These are characterized by genome degradation and appear to be adapting to an invasive lifestyle. Investigation of rare patients with primary immunodeficiencies has suggested a key role for interferon gamma-mediated immunity in host defense against NTS. This concept has been supported by recent population-based host genetic studies in African children. In contrast, immunoepidemiological studies from Africa indicate an important role for antibody for protective immunity, supporting the development of antibody-inducing vaccines against iNTS disease. With candidate O-antigen-based vaccines due to enter clinical trials in the near future, research efforts should focus on understanding the relative contributions of antibody and cell-mediated immunity to protection against iNTS disease in humans.
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Affiliation(s)
| | - Calman A MacLennan
- Jenner Institute, Nuffield Department of Medicine, University of Oxford, Oxford, UK
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Optimal protection against Salmonella infection requires noncirculating memory. Proc Natl Acad Sci U S A 2018; 115:10416-10421. [PMID: 30254173 DOI: 10.1073/pnas.1808339115] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
While CD4 Th1 cells are required for resistance to intramacrophage infections, adoptive transfer of Th1 cells is insufficient to protect against Salmonella infection. Using an epitope-tagged vaccine strain of Salmonella, we found that effective protection correlated with expanded Salmonella-specific memory CD4 T cells in circulation and nonlymphoid tissues. However, naive mice that previously shared a blood supply with vaccinated partners lacked T cell memory with characteristics of tissue residence and did not acquire robust protective immunity. Using a YFP-IFN-γ reporter system, we identified Th1 cells in the liver of immunized mice that displayed markers of tissue residence, including P2X7, ARTC2, LFA-1, and CD101. Adoptive transfer of liver memory cells after ARTC2 blockade increased protection against highly virulent bacteria. Taken together, these data demonstrate that noncirculating memory Th1 cells are a vital component of immunity to Salmonella infection and should be the focus of vaccine strategies.
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Wu H, Ye L, Lu X, Xie S, Yang Q, Yu Q. Lactobacillus acidophilus Alleviated Salmonella-Induced Goblet Cells Loss and Colitis by Notch Pathway. Mol Nutr Food Res 2018; 62:e1800552. [PMID: 30198100 DOI: 10.1002/mnfr.201800552] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2018] [Revised: 09/06/2018] [Indexed: 12/24/2022]
Abstract
SCOPE The intestinal mucosal barrier, including the mucus layer, protects against invasion of enteropathogens, thereby inhibiting infection. In this study, the protective effect of Lactobacillus on the intestinal barrier against Salmonella infection is investigated. The underlying mechanism of its effect, specifically on the regulation of goblet cells through the Notch pathway, is also elucidated. METHODS AND RESULTS Here, the protective effect of Lactobacillus on alleviating changes in the intestinal barrier caused by Salmonella infection is explored. It has been found that Salmonella typhimurium colonizes the colon and damages colonic mucosa. However, Lactobacillus acidophilus ATCC 4356 alleviates the colitis caused by Salmonella infection. Moreover, S. typhimurium infection causes colonic crypt hyperplasia with increased PCNA+ cells, while L. acidophilus administration resolves these pathological changes. In addition, it has been further demonstrated that Salmonella results in severe colitis associated with goblet cells, and Lactobacillus improves colitis similarly associated with goblet cells. Salmonella infection induces goblet cell loss and reduces MUC2 expression by increasing Dll1, Dll4, and HES1 expression, while L. acidophilus reverses epithelial damage by balancing the Notch pathway. CONCLUSION The study demonstrates that colitis improvement is controlled by Lactobacillus ATCC 4356 by regulation of the Notch pathway; this finding will be useful for prevention against animal S. typhimurium infection.
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Affiliation(s)
- Haiqin Wu
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, No. 1 Weigang, Nanjing, Jiangsu, 210095, P. R. China
| | - Lulu Ye
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, No. 1 Weigang, Nanjing, Jiangsu, 210095, P. R. China
| | - Xiaoxi Lu
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, No. 1 Weigang, Nanjing, Jiangsu, 210095, P. R. China
| | - Shuang Xie
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, No. 1 Weigang, Nanjing, Jiangsu, 210095, P. R. China
| | - Qian Yang
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, No. 1 Weigang, Nanjing, Jiangsu, 210095, P. R. China
| | - Qinghua Yu
- MOE Joint International Research Laboratory of Animal Health and Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, No. 1 Weigang, Nanjing, Jiangsu, 210095, P. R. China
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Increasing prevalence and dissemination of invasive nontyphoidal Salmonella serotype Typhimurium with multidrug resistance in hospitalized patients from southern Brazil. Braz J Infect Dis 2018; 22:424-432. [PMID: 30240572 PMCID: PMC9427803 DOI: 10.1016/j.bjid.2018.08.002] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2018] [Revised: 08/16/2018] [Accepted: 08/23/2018] [Indexed: 11/20/2022] Open
Abstract
Introduction Aim Methods Results Conclusion
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44
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Perez-Shibayama C, Gil-Cruz C, Cheng HW, Onder L, Printz A, Mörbe U, Novkovic M, Li C, Lopez-Macias C, Buechler MB, Turley SJ, Mack M, Soneson C, Robinson MD, Scandella E, Gommerman J, Ludewig B. Fibroblastic reticular cells initiate immune responses in visceral adipose tissues and secure peritoneal immunity. Sci Immunol 2018; 3:3/26/eaar4539. [DOI: 10.1126/sciimmunol.aar4539] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Revised: 04/18/2018] [Accepted: 06/07/2018] [Indexed: 12/19/2022]
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45
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Rossi O, Dybowski R, Maskell DJ, Grant AJ, Restif O, Mastroeni P. Within-host spatiotemporal dynamics of systemic Salmonella infection during and after antimicrobial treatment. J Antimicrob Chemother 2018; 72:3390-3397. [PMID: 28962012 PMCID: PMC5890750 DOI: 10.1093/jac/dkx294] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2017] [Accepted: 07/20/2017] [Indexed: 01/23/2023] Open
Abstract
Objectives We determined the interactions between efficacy of antibiotic treatment, pathogen growth rates and between-organ spread during systemic Salmonella infections. Methods We infected mice with isogenic molecularly tagged subpopulations of either a fast-growing WT or a slow-growing ΔaroC Salmonella strain. We monitored viable bacterial numbers and fluctuations in the proportions of each bacterial subpopulation in spleen, liver, blood and mesenteric lymph nodes (MLNs) before, during and after the cessation of treatment with ampicillin and ciprofloxacin. Results Both antimicrobials induced a reduction in viable bacterial numbers in the spleen, liver and blood. This reduction was biphasic in infections with fast-growing bacteria, with a rapid initial reduction followed by a phase of lower effect. Conversely, a slow and gradual reduction of the bacterial load was seen in infections with the slow-growing strain, indicating a positive correlation between bacterial net growth rates and the efficacy of ampicillin and ciprofloxacin. The viable numbers of either bacterial strain remained constant in MLNs throughout the treatment with a relapse of the infection with WT bacteria occurring after cessation of the treatment. The frequency of each tagged bacterial subpopulation was similar in the spleen and liver, but different from that of the MLNs before, during and after treatment. Conclusions In Salmonella infections, bacterial growth rates correlate with treatment efficacy. MLNs are a site with a bacterial population structure different to those of the spleen and liver and where the total viable bacterial load remains largely unaffected by antimicrobials, but can resume growth after cessation of treatment.
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Affiliation(s)
- O Rossi
- University of Cambridge, Department of Veterinary Medicine, Cambridge, UK
| | - R Dybowski
- University of Cambridge, Department of Veterinary Medicine, Cambridge, UK
| | - D J Maskell
- University of Cambridge, Department of Veterinary Medicine, Cambridge, UK
| | - A J Grant
- University of Cambridge, Department of Veterinary Medicine, Cambridge, UK
| | - O Restif
- University of Cambridge, Department of Veterinary Medicine, Cambridge, UK
| | - P Mastroeni
- University of Cambridge, Department of Veterinary Medicine, Cambridge, UK
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46
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Kak G, Raza M, Tiwari BK. Interferon-gamma (IFN-γ): Exploring its implications in infectious diseases. Biomol Concepts 2018; 9:64-79. [PMID: 29856726 DOI: 10.1515/bmc-2018-0007] [Citation(s) in RCA: 330] [Impact Index Per Article: 55.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2018] [Accepted: 04/20/2018] [Indexed: 12/12/2022] Open
Abstract
A key player in driving cellular immunity, IFN-γ is capable of orchestrating numerous protective functions to heighten immune responses in infections and cancers. It can exhibit its immunomodulatory effects by enhancing antigen processing and presentation, increasing leukocyte trafficking, inducing an anti-viral state, boosting the anti-microbial functions and affecting cellular proliferation and apoptosis. A complex interplay between immune cell activity and IFN-γ through coordinated integration of signals from other pathways involving cytokines and Pattern Recognition Receptors (PRRs) such as Interleukin (IL)-4, TNF-α, Lipopolysaccharide (LPS), Type-I Interferons (IFNS) etc. leads to initiation of a cascade of pro-inflammatory responses. Microarray data has unraveled numerous genes whose transcriptional regulation is influenced by IFN-γ. Consequently, IFN-γ stimulated cells display altered expression of many such target genes which mediate its downstream effector functions. The importance of IFN-γ is further reinforced by the fact that mice possessing disruptions in the IFN-γ gene or its receptor develop extreme susceptibility to infectious diseases and rapidly succumb to them. In this review, we attempt to elucidate the biological functions and physiological importance of this versatile cytokine. The functional implications of its biological activity in several infectious diseases and autoimmune pathologies are also discussed. As a counter strategy, many virulent pathogenic species have devised ways to thwart IFN-γ endowed immune-protection. Thus, IFN-γ mediated host-pathogen interactions are critical for our understanding of disease mechanisms and these aspects also manifest enormous therapeutic importance for the annulment of various infections and autoimmune conditions.
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Affiliation(s)
- Gunjan Kak
- From the Infectious Disease Immunology Lab, Dr. B R Ambedkar Center for Biomedical Research, University of Delhi, Delhi, 110007, India
| | - Mohsin Raza
- Department of Biochemistry, University of Delhi, South Campus, New Delhi, 110021, India
| | - Brijendra K Tiwari
- From the Infectious Disease Immunology Lab, Dr. B R Ambedkar Center for Biomedical Research, University of Delhi, Delhi, 110007, India
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47
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Kang E, Crouse A, Chevallier L, Pontier SM, Alzahrani A, Silué N, Campbell-Valois FX, Montagutelli X, Gruenheid S, Malo D. Enterobacteria and host resistance to infection. Mamm Genome 2018; 29:558-576. [PMID: 29785663 DOI: 10.1007/s00335-018-9749-4] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Accepted: 05/14/2018] [Indexed: 02/06/2023]
Abstract
Enterobacteriaceae are a large family of Gram-negative, non-spore-forming bacteria. Although many species exist as part of the natural flora of animals including humans, some members are associated with both intestinal and extraintestinal diseases. In this review, we focus on members of this family that have important roles in human disease: Salmonella, Escherichia, Shigella, and Yersinia, providing a brief overview of the disease caused by these bacteria, highlighting the contribution of animal models to our understanding of their pathogenesis and of host genetic determinants involved in susceptibility or resistance to infection.
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Affiliation(s)
- Eugene Kang
- Department of Microbiology and Immunology, McGill University, Montreal, QC, Canada
- McGill Research Center on Complex Traits, McGill University, Montreal, QC, Canada
| | - Alanna Crouse
- McGill Research Center on Complex Traits, McGill University, Montreal, QC, Canada
- Department of Human Genetics, McGill University, Montreal, QC, Canada
| | - Lucie Chevallier
- U955 - IMRB, Team 10 - Biology of the neuromuscular system, Inserm, École Nationale Vétérinaire d'Alfort, UPEC, Maisons-Alfort, France
- Mouse Genetics Laboratory, Department of Genomes and Genetics, Institut Pasteur, Paris, France
| | - Stéphanie M Pontier
- Department of Chemistry and Biomolecular Sciences, Centre for Chemical and Synthetic Biology, University of Ottawa, Ottawa, ON, Canada
| | - Ashwag Alzahrani
- Department of Chemistry and Biomolecular Sciences, Centre for Chemical and Synthetic Biology, University of Ottawa, Ottawa, ON, Canada
| | - Navoun Silué
- Department of Chemistry and Biomolecular Sciences, Centre for Chemical and Synthetic Biology, University of Ottawa, Ottawa, ON, Canada
| | - François-Xavier Campbell-Valois
- Department of Chemistry and Biomolecular Sciences, Centre for Chemical and Synthetic Biology, University of Ottawa, Ottawa, ON, Canada
- Department of Biochemistry, Microbiology and Immunology, University of Ottawa, Ottawa, ON, Canada
| | - Xavier Montagutelli
- U955 - IMRB, Team 10 - Biology of the neuromuscular system, Inserm, École Nationale Vétérinaire d'Alfort, UPEC, Maisons-Alfort, France
| | - Samantha Gruenheid
- Department of Microbiology and Immunology, McGill University, Montreal, QC, Canada
- McGill Research Center on Complex Traits, McGill University, Montreal, QC, Canada
| | - Danielle Malo
- McGill Research Center on Complex Traits, McGill University, Montreal, QC, Canada.
- Department of Human Genetics, McGill University, Montreal, QC, Canada.
- Department of Medicine, McGill University, Montreal, QC, Canada.
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48
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Gilchrist JJ, Rautanen A, Fairfax BP, Mills TC, Naranbhai V, Trochet H, Pirinen M, Muthumbi E, Mwarumba S, Njuguna P, Mturi N, Msefula CL, Gondwe EN, MacLennan JM, Chapman SJ, Molyneux ME, Knight JC, Spencer CCA, Williams TN, MacLennan CA, Scott JAG, Hill AVS. Risk of nontyphoidal Salmonella bacteraemia in African children is modified by STAT4. Nat Commun 2018. [PMID: 29523850 PMCID: PMC5844948 DOI: 10.1038/s41467-017-02398-z] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Nontyphoidal Salmonella (NTS) is a major cause of bacteraemia in Africa. The disease typically affects HIV-infected individuals and young children, causing substantial morbidity and mortality. Here we present a genome-wide association study (180 cases, 2677 controls) and replication analysis of NTS bacteraemia in Kenyan and Malawian children. We identify a locus in STAT4, rs13390936, associated with NTS bacteraemia. rs13390936 is a context-specific expression quantitative trait locus for STAT4 RNA expression, and individuals carrying the NTS-risk genotype demonstrate decreased interferon-γ (IFNγ) production in stimulated natural killer cells, and decreased circulating IFNγ concentrations during acute NTS bacteraemia. The NTS-risk allele at rs13390936 is associated with protection against a range of autoimmune diseases. These data implicate interleukin-12-dependent IFNγ-mediated immunity as a determinant of invasive NTS disease in African children, and highlight the shared genetic architecture of infectious and autoimmune disease.
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Affiliation(s)
- James J Gilchrist
- Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, OX3 7BN, UK. .,Department of Paediatrics, University of Oxford, Oxford, OX3 9DU, UK.
| | - Anna Rautanen
- Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, OX3 7BN, UK
| | - Benjamin P Fairfax
- Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, OX3 7BN, UK
| | - Tara C Mills
- Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, OX3 7BN, UK
| | - Vivek Naranbhai
- Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, OX3 7BN, UK
| | - Holly Trochet
- Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, OX3 7BN, UK
| | - Matti Pirinen
- Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, OX3 7BN, UK.,Institute for Molecular Medicine, Finland (FIMM) University of Helsinki, FI-00014, Helsinki, Finland
| | - Esther Muthumbi
- KEMRI-Wellcome Trust Research Programme, Kilifi, 80108, Kenya
| | - Salim Mwarumba
- KEMRI-Wellcome Trust Research Programme, Kilifi, 80108, Kenya
| | | | - Neema Mturi
- KEMRI-Wellcome Trust Research Programme, Kilifi, 80108, Kenya
| | - Chisomo L Msefula
- Malawi-Liverpool-Wellcome Trust Clinical Research Programme, College of Medicine, P.O. Box 30096, Chichiri, Blantyre, Malawi.,Pathology Department, College of Medicine, P.O. Box 360, Chichiri, Blantyre, Malawi
| | - Esther N Gondwe
- Malawi-Liverpool-Wellcome Trust Clinical Research Programme, College of Medicine, P.O. Box 30096, Chichiri, Blantyre, Malawi
| | - Jenny M MacLennan
- Malawi-Liverpool-Wellcome Trust Clinical Research Programme, College of Medicine, P.O. Box 30096, Chichiri, Blantyre, Malawi.,Department of Zoology, University of Oxford, South Parks Road, Oxford, OX1 3PS, UK
| | - Stephen J Chapman
- Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, OX3 7BN, UK.,Oxford Centre for Respiratory Medicine, Churchill Hospital Site, Oxford University Hospitals, Oxford, OX3 7LE, UK
| | - Malcolm E Molyneux
- Malawi-Liverpool-Wellcome Trust Clinical Research Programme, College of Medicine, P.O. Box 30096, Chichiri, Blantyre, Malawi
| | - Julian C Knight
- Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, OX3 7BN, UK
| | - Chris C A Spencer
- Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, OX3 7BN, UK
| | - Thomas N Williams
- KEMRI-Wellcome Trust Research Programme, Kilifi, 80108, Kenya.,Department of Medicine, Imperial College, Norfolk Place, London, W2 1PG, UK
| | - Calman A MacLennan
- Malawi-Liverpool-Wellcome Trust Clinical Research Programme, College of Medicine, P.O. Box 30096, Chichiri, Blantyre, Malawi.,The Jenner Institute, University of Oxford, Old Road Campus Research Building, Oxford, OX3 7DQ, UK
| | - J Anthony G Scott
- KEMRI-Wellcome Trust Research Programme, Kilifi, 80108, Kenya.,Department of Infectious Disease Epidemiology, London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, UK
| | - Adrian V S Hill
- Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, OX3 7BN, UK. .,The Jenner Institute, University of Oxford, Old Road Campus Research Building, Oxford, OX3 7DQ, UK.
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Haselbeck AH, Panzner U, Im J, Baker S, Meyer CG, Marks F. Current perspectives on invasive nontyphoidal Salmonella disease. Curr Opin Infect Dis 2017; 30:498-503. [PMID: 28731899 PMCID: PMC7680934 DOI: 10.1097/qco.0000000000000398] [Citation(s) in RCA: 65] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
PURPOSE OF REVIEW We searched PubMed for scientific literature published in the past 2 years for relevant information regarding the burden of invasive nontyphoidal Salmonella disease and host factors associated with nontyphoidal Salmonella infection and discuss current knowledge on vaccine development. The following search terms were used: Salmonella, non typhoidal/nontyphoidal, NTS, disease, bloodstream infection, invasive, sepsis/septicaemia/septicemia, bacteraemia/bacteremia, gastroenteritis, incidence, prevalence, morbidity, mortality, case fatality, host/risk factor, vaccination, and prevention/control. RECENT FINDINGS Estimates of the global invasive nontyphoidal Salmonella disease burden have been recently updated; additional data from Africa, Asia, and Latin America are now available. New data bridge various knowledge gaps, particularly with respect to host risk factors and the geographical distribution of iNTS serovars. It has also been observed that Salmonella Typhimurium sequence type 313 is emergent in several African countries. Available data suggest that genetic variation in the sequence type 313 strain has led to increased pathogenicity and human host adaptation. A bivalent efficacious vaccine, targeting Salmonella serovars Typhimurium and Enteritidis, would significantly lower the disease burden in high-risk populations. SUMMARY The mobilization of surveillance networks, especially in Asia and Latin America, may provide missing data regarding the invasive nontyphoidal Salmonella disease burden and their corresponding antimicrobial susceptibility profiles. Efforts and resources should be directed toward invasive nontyphoidal Salmonella disease vaccine development.
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Affiliation(s)
- Andrea H. Haselbeck
- International Vaccine Institute, Epidemiology Unit, Seoul, Republic of Korea
| | - Ursula Panzner
- International Vaccine Institute, Epidemiology Unit, Seoul, Republic of Korea
| | - Justin Im
- International Vaccine Institute, Epidemiology Unit, Seoul, Republic of Korea
| | - Stephen Baker
- Hospital for Tropical Diseases,Wellcome Trust Major Overseas Programme, Oxford University Clinical Research Unit, Ho Chi Minh City,Vietnam
- Department of Medicine, University of Cambridge, Cambridge,United Kingdom
| | - Christian G. Meyer
- Institute of Tropical Medicine, Eberhard-Karls University T€ubingen, T€ubingen, Germany and
- Duy Tan University, Da Nang, Vietnam
| | - Florian Marks
- International Vaccine Institute, Epidemiology Unit, Seoul, Republic of Korea
- Department of Medicine, University of Cambridge, Cambridge,United Kingdom
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50
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Yu J, Zhu YH, Yang GY, Zhang W, Zhou D, Su JH, Wang JF. Anti-inflammatory capacity of Lactobacillus rhamnosus GG in monophasic variant Salmonella infected piglets is correlated with impeding NLRP6-mediated host inflammatory responses. Vet Microbiol 2017; 210:91-100. [PMID: 29103703 DOI: 10.1016/j.vetmic.2017.08.008] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Revised: 08/08/2017] [Accepted: 08/15/2017] [Indexed: 01/10/2023]
Abstract
In this study, we investigated the effect of Lactobacillus rhamnosus GG strain (LGG) in ameliorating enteritis in newly weaned pigs following challenge with a monophasic variant of Salmonella enterica serovar Typhimurium (serotyped as 4,[5],12:i:-), which has been linked to disease in humans and livestocks over the past 10 years. In weaned pigs, S. enterica serovar 4,[5],12:i:- induced the mRNA expression of toll like receptor (TLR) 5 and TLR4, while increasing interleukin (IL)-8 and IL-6 mRNA expression in the jejunum. The monophasic variant Salmonella stimulated the expression of nucleotide-binding oligomerization domain-containing protein 1/2 (NOD1/2) mRNA in the ileum, which was accompanied by phosphorylation of IκB-α, an inhibitor of NF-κB, activating the NF-κB pathway and promoting the release of inflammatory cytokines. Oral administration of LGG attenuated the Salmonella-induced increases in the expression of NOD1 mRNA of jejunal and ileal tissues. LGG promoted the secretion of immunoglobulin A in different intestinal segments but did not induce expression of polymeric immunoglobulin receptor. LGG also impeded the activation of the Nod-like receptor protein (NLRP) 6/apoptosis-associated speck-like protein/caspase-1 inflammasome and decreased the production of IL-18 in the ileum during Salmonella infection. In contrast, activation of the NLRP3 inflammasome was not altered. Our data indicate that LGG accelerated the clearance of Salmonella in the early phase of infection and prevented the excessive inflammatory responses in S. enterica serovar 4,[5],12:i:- model. LGG ameliorates inflammation induced by infection with the monophasic variant Salmonella via inhibition of the canonical NF-κB pathway and attenuation of the NLRP6-mediated inflammasome in the intestine.
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Affiliation(s)
- Jiao Yu
- College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Yao-Hong Zhu
- College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Gui-Yan Yang
- College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Wei Zhang
- College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Dong Zhou
- College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Jin-Hui Su
- College of Veterinary Medicine, China Agricultural University, Beijing 100193, China
| | - Jiu-Feng Wang
- College of Veterinary Medicine, China Agricultural University, Beijing 100193, China.
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