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Gouveia-Eufrasio L, de Freitas GJC, Costa MC, Peres-Emidio EC, Carmo PHF, Rodrigues JGM, de Rezende MC, Rodrigues VF, de Brito CB, Miranda GS, de Lima PA, da Silva LMV, Oliveira JBS, da Paixão TA, da Glória de Souza D, Fagundes CT, Peres NTDA, Negrão-Correa DA, Santos DA. The Th2 Response and Alternative Activation of Macrophages Triggered by Strongyloides venezuelensis Is Linked to Increased Morbidity and Mortality Due to Cryptococcosis in Mice. J Fungi (Basel) 2023; 9:968. [PMID: 37888224 PMCID: PMC10607621 DOI: 10.3390/jof9100968] [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] [Received: 08/01/2023] [Revised: 09/21/2023] [Accepted: 09/22/2023] [Indexed: 10/28/2023] Open
Abstract
Cryptococcosis is a systemic mycosis that causes pneumonia and meningoencephalitis. Strongyloidiasis is a chronic gastrointestinal infection caused by parasites of the genus Strongyloides. Cryptococcosis and strongyloidiasis affect the lungs and are more prevalent in the same world regions, i.e., Africa and tropical countries such as Brazil. It is undeniable that those coincidences may lead to the occurrence of coinfections. However, there are no studies focused on the interaction between Cryptococcus spp. and Strongyloides spp. In this work, we aimed to investigate the interaction between Strongyloides venezuelensis (Sv) and Cryptococcus gattii (Cg) in a murine coinfection model. Murine macrophage exposure to Sv antigens reduced their ability to engulf Cg and produce reactive oxygen species, increasing the ability of fungal growth intracellularly. We then infected mice with both pathogens. Sv infection skewed the host's response to fungal infection, increasing lethality in a murine coinfection model. In addition to increased NO levels and arginase activity, coinfected mice presented a classic Th2 anti-Sv response: eosinophilia, higher levels of alternate activated macrophages (M2), increased concentrations of CCL24 and IL-4, and lower levels of IL-1β. This milieu favored fungal growth in the lungs with prominent translocation to the brain, increasing the host's tissue damage. In conclusion, our data shows that primary Sv infection promotes Th2 bias of the pulmonary response to Cg-infection and worsens its pathological outcomes.
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Affiliation(s)
- Ludmila Gouveia-Eufrasio
- Departamento de Microbiologia, Laboratório de Micologia, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; (L.G.-E.); (N.T.d.A.P.)
| | - Gustavo José Cota de Freitas
- Departamento de Microbiologia, Laboratório de Micologia, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; (L.G.-E.); (N.T.d.A.P.)
| | - Marliete Carvalho Costa
- Departamento de Microbiologia, Laboratório de Micologia, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; (L.G.-E.); (N.T.d.A.P.)
| | - Eluzia Castro Peres-Emidio
- Departamento de Microbiologia, Laboratório de Micologia, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; (L.G.-E.); (N.T.d.A.P.)
| | - Paulo Henrique Fonseca Carmo
- Departamento de Microbiologia, Laboratório de Micologia, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; (L.G.-E.); (N.T.d.A.P.)
| | - João Gustavo Mendes Rodrigues
- Departamento de Parasitologia, Laboratório de Esquistossomose, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil (D.A.N.-C.)
| | - Michelle Carvalho de Rezende
- Departamento de Parasitologia, Laboratório de Esquistossomose, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil (D.A.N.-C.)
| | - Vanessa Fernandes Rodrigues
- Departamento de Parasitologia, Laboratório de Esquistossomose, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil (D.A.N.-C.)
| | - Camila Bernardo de Brito
- Departamento de Microbiologia, Laboratório de Interação Microrganismo-Hospedeiro, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil (D.d.G.d.S.); (C.T.F.)
| | - Guilherme Silva Miranda
- Departamento de Parasitologia, Laboratório de Esquistossomose, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil (D.A.N.-C.)
| | - Pâmela Aparecida de Lima
- Departamento de Patologia, Laboratório de Patologia Celular e Molecular, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil (T.A.d.P.)
| | - Lívia Mara Vitorino da Silva
- Departamento de Microbiologia, Laboratório de Micologia, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; (L.G.-E.); (N.T.d.A.P.)
| | - Jefferson Bruno Soares Oliveira
- Departamento de Patologia, Laboratório de Patologia Celular e Molecular, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil (T.A.d.P.)
| | - Tatiane Alves da Paixão
- Departamento de Patologia, Laboratório de Patologia Celular e Molecular, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil (T.A.d.P.)
| | - Daniele da Glória de Souza
- Departamento de Microbiologia, Laboratório de Interação Microrganismo-Hospedeiro, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil (D.d.G.d.S.); (C.T.F.)
| | - Caio Tavares Fagundes
- Departamento de Microbiologia, Laboratório de Interação Microrganismo-Hospedeiro, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil (D.d.G.d.S.); (C.T.F.)
| | - Nalu Teixeira de Aguiar Peres
- Departamento de Microbiologia, Laboratório de Micologia, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; (L.G.-E.); (N.T.d.A.P.)
| | - Deborah Aparecida Negrão-Correa
- Departamento de Parasitologia, Laboratório de Esquistossomose, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil (D.A.N.-C.)
| | - Daniel Assis Santos
- Departamento de Microbiologia, Laboratório de Micologia, Universidade Federal de Minas Gerais, Belo Horizonte 31270-901, Brazil; (L.G.-E.); (N.T.d.A.P.)
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Appraisal and Simulation on Codynamics of Pneumonia and Meningitis with Vaccination Intervention: From a Mathematical Model Perspective. COMPUTATIONAL AND MATHEMATICAL METHODS IN MEDICINE 2022; 2022:9945047. [PMID: 36479316 PMCID: PMC9722281 DOI: 10.1155/2022/9945047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 11/01/2022] [Accepted: 11/07/2022] [Indexed: 12/02/2022]
Abstract
The membranes that encompass the brain and spinal cord become inflamed by the potentially fatal infectious disease called pneumococcal meningitis. Pneumonia and meningitis "coinfection" refers to the presence of both conditions in a single host. In this work, we accounted for the dynamics of pneumonia and meningitis coinfection in communities by erroneously using a compartment model to analyze and suggest management techniques to stakeholders. We have used the next generation matrix approach and derived the effective reproduction numbers. When the reproduction number is less than one, the constructed model yields a locally asymptotically stable disease-free equilibrium point. Additionally, we conducted a sensitivity analysis to determine how different factors affected the incidence and transmission rate, which revealed that both the pneumonia and meningitis transmission rates are extremely sensitive. The performance of our numerical simulation demonstrates that the endemic equilibrium point of the pneumonia and meningitis coinfection model is locally asymptotically stable when max{ ℛ 1, ℛ 2} > 1. Finally, as preventative and control measures for the coinfection of pneumonia and meningitis illness, the stakeholders must concentrate on reducing the transmission rates, reducing vaccination wane rates, and boosting the portion of vaccination rates for both pneumonia and meningitis.
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Facile Green Synthesis of Silver Nanoparticles Using Aqueous Leaf Extract of Origanum majorana with Potential Bioactivity against Multidrug Resistant Bacterial Strains. CRYSTALS 2022. [DOI: 10.3390/cryst12050603] [Citation(s) in RCA: 27] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The high prevalence of nosocomial bacterial resistance contributes to significant mortality and morbidity around the world; thus, finding novel antibacterial agents is of vital concern. Accordingly, the present study attempted to synthesize silver nanoparticles (AgNPs) using a green approach. Aqueous leaf extract of Origanum majorana was used to synthesize AgNPs and the antibacterial efficiency against multidrug resistant bacterial strains was detected. Characterization of the biogenic AgNPs was performed using ultraviolet-visible spectrophotometry (UV-Vis), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX), Fourier transform infrared spectroscopy (FT-IR) analysis, and X-ray diffraction analysis (XRD). The disc diffusion method was used to detect the antibacterial activity of AgNPs against three nosocomial multidrug-resistant strains. Preliminary UV-Vis analysis revealed the biosynthesis of AgNPs due to peak formation at 374 nm, corresponding to the surface plasmon resonance (SPR) of biogenic AgNPs. TEM micrographs detected the synthesis of small AgNPs with an average particle size of 26.63 nm. EDX analysis revealed the presence of the following elements: oxygen (3.69%), carbon (2.93%), aluminum (1.29), silicon (2.83%), chloride (17.89%), and silver (71.37%). Furthermore, XRD analysis revealed the presence of diffraction peaks at 2 theta (θ) degrees of 38.18°, 44.36°, 64.35°, and 77.54°, assigned to the planes of silver crystals (111), (200), (220), and (311), respectively. Collectively, these findings affirm the synthesis of biogenic AgNPs with potential physicochemical characteristics. The antimicrobial efficiency of the biogenic AgNPs indicated that Klebsiella pneumoniae strain was the most susceptible strain at concentrations of 50 and 100 µg/disk, with inhibitory zones of 21.57 and 24.56 mm, respectively. The minimum inhibitory concentration (MIC) of AgNPs against Klebsiella pneumoniae strain was found to be 10 µg/mL, while the minimum bactericidal concentration (MBC) was found to be 20 µg/mL. In conclusion, aqueous leaf extract of O. majorana mediated synthesis of small sized AgNPs, with potential antimicrobial effectiveness against multidrug-resistant bacterial pathogens.
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Piazza A, Perini M, Mauri C, Comandatore F, Meroni E, Luzzaro F, Principe L. Antimicrobial Susceptibility, Virulence, and Genomic Features of a Hypervirulent Serotype K2, ST65 Klebsiella pneumoniae Causing Meningitis in Italy. Antibiotics (Basel) 2022; 11:antibiotics11020261. [PMID: 35203864 PMCID: PMC8868201 DOI: 10.3390/antibiotics11020261] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2022] [Revised: 02/14/2022] [Accepted: 02/15/2022] [Indexed: 12/16/2022] Open
Abstract
The rise of a new hypervirulent variant of Klebsiella pneumoniae (hvKp) was recently reported, mainly linked to the ST23 lineage. The hvKp variants can cause severe infections, including hepatic abscesses, bacteremia, and meningitis, with a particularly disconcerting propensity to cause community-acquired, life-threatening infection among young and otherwise healthy individuals. The present study aimed to report the clinical characteristics of a hypermucoviscous K. pneumoniae strain isolated in Italy and sustaining recurrent meningitis in a patient of Peruvian origin. A further objective was to retrospectively investigate, by means of whole-genome sequencing (WGS) analysis, the genomic features of such an isolate. The hypermucoviscosity phenotype of the strain (sk205y205t) was determined using the string test. Genomic information was obtained by WGS (Illumina) and bioinformatic analysis. Strain sk205y205t was susceptible to most antibiotics, despite the presence of some resistance genes, including blaSHV-11, blaSHV-67, fosA, and acrR. The isolate belonged to ST65 and serotype K2, and exhibited several virulence factors related to the hvKp variant. Among these, were the siderophore genes entB, irp2, iroN, iroB, and iucA; the capsule-regulating genes rmpA and rmpA2; and the type 1 and 3 fimbriae fimH27 and mrkD, respectively. A further operon, encoding the genotoxin colibactin (clbA-Q), was also identified. The virulence plasmids pK2044, pRJA166b, and pNDM. MAR were also detected. Phylogenetic investigation showed that this Italian strain is highly similar to a Chinese isolate, suggesting a hidden circulation of this hvKp ST65 K2 lineage.
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Affiliation(s)
- Aurora Piazza
- Clinical-Surgical, Diagnostic and Pediatric Sciences Department, Unit of Microbiology and Clinical Microbiology, University of Pavia, 27100 Pavia, Italy;
| | - Matteo Perini
- Romeo and Enrica Invernizzi Pediatric Research Center, Department of Biomedical and Clinical Sciences L. Sacco, University of Milan, 20157 Milan, Italy; (M.P.); (F.C.)
| | - Carola Mauri
- Microbiology and Virology Unit, A. Manzoni Hospital, 23900 Lecco, Italy; (C.M.); (E.M.); (F.L.)
| | - Francesco Comandatore
- Romeo and Enrica Invernizzi Pediatric Research Center, Department of Biomedical and Clinical Sciences L. Sacco, University of Milan, 20157 Milan, Italy; (M.P.); (F.C.)
| | - Elisa Meroni
- Microbiology and Virology Unit, A. Manzoni Hospital, 23900 Lecco, Italy; (C.M.); (E.M.); (F.L.)
| | - Francesco Luzzaro
- Microbiology and Virology Unit, A. Manzoni Hospital, 23900 Lecco, Italy; (C.M.); (E.M.); (F.L.)
| | - Luigi Principe
- Microbiology and Virology Unit, A. Manzoni Hospital, 23900 Lecco, Italy; (C.M.); (E.M.); (F.L.)
- Correspondence:
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Isolation and Identification of a Wastewater Siphoviridae Bacteriophage Targeting Multidrug-resistant Klebsiella pneumoniae. Jundishapur J Microbiol 2021. [DOI: 10.5812/jjm.118910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Background: Based on the WHO, multidrug-resistant Klebsiella pneumoniae is a priority pathogen that causes opportunistic infections and is widely spread in the environment. Phage therapy is considered a natural, safe, and very efficient alternative to treat difficult-to-treat infections. Objectives: This study aimed to isolate highly virulent, lytic bacteriophages and evaluate their efficacy for lysing multidrug-resistant K. pneumoniae. Methods: Municipal wastewater samples were collected and filtered using 0.22 µm syringe filters and cultivated with log-phase cultures of K. pneumoniae using enrichment media. After 48 h of incubation, the cultures were centrifuged, and the resultant supernatant was filtered (0.22 µm). The detection of the phage was done using the spot assay with K. pneumoniae as the host. One-step growth kinetics and bacterial reduction tests were conducted to assess the growth kinetics of the isolated phage. The stability of the isolated phage was characterized by subjecting it to various temperature and pH conditions. The chemical stability of the K. pneumoniae phage was determined by exposing it to various organic compounds. A panel of 20 bacterial strains was tested using the spot assay, as well as double agar overlying assay, to determine the host range of the isolated phage. Results: Out of 40 wastewater samples tested, only one sample was tested positive for the K. pneumoniae phage (2.5%) that was lytic against the host strain. The K. pneumoniae phage had a latent period of 15 min and a burst size of 100 virions per infected cell. It was most stable at 37°C and pH range of 6.0 to 10.0. Chemically, the K. pneumoniae phage was resistant to 10% chloroform treatment. Transmission electron micrograph indicated that the K. pneumoniae phage belonged to the order Caudovirales, family Siphoviridae, morphotype B1. Conclusions: Most of the characteristic features of the K. pneumoniae phage indicated the potential of this phage to be used in phage therapy. Hence, a comprehensive study is highly recommended to characterize the K. pneumoniae phage genome, detect its molecular interactions with the host cell, and determine its lytic activity in combination with other phages, which may lead to the efficient utilization of this phage in phage therapy against K. pneumoniae infections.
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Davoudabadi S, Goudarzi H, Goudarzi M, Ardebili A, Faghihloo E, Sharahi JY, Hashemi A. Detection of extensively drug-resistant and hypervirulent Klebsiella pneumoniae ST15, ST147, ST377 and ST442 in Iran. Acta Microbiol Immunol Hung 2021; 69:77-86. [PMID: 34546968 DOI: 10.1556/030.2021.01562] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2021] [Accepted: 09/03/2021] [Indexed: 01/12/2023]
Abstract
In this study, we focused on the emergence of extensively drug-resistant (XDR), pandrug-resistant (PDR), and hypervirulent Klebsiella pneumoniae (hvKP) in Iran. During 2018 to 2020 a total of 52 K. pneumoniae isolates were collected from different clinical specimens. The hvKP isolates were identified by PCR amplification of virulence and capsular serotype-specific genes. Hypermucoviscous K. pneumoniae (hmKP) were identified by string test. Carbapenem-resistant hvKP (CR-hvKP), multidrug-resistant hvKP (MDR-hvKP), extensively drug-resistant hvKP (XDR-hvKP), and pandrug-resistant hvKP (PDR-hvKP) were determined by disc diffusion method, Carba-NP test and PCR method. XDR-hvKP isolates were typed by multilocus sequence typing (MLST). Among all K. pneumoniae isolates 14 (26.9%) were identified as hvKP and 78.6% (11/14) of them were hmKP however, none of the classic K. pneumoniae (cKP) isolates were hmKP. The predominant capsular serotype of hvKP was K2 (42.85%) followed by K1 (35.71%). The prevalence of MDR-hvKP, XDR-hvKP and PDR-hvKP isolates were 6 (42.9%), 5 (35.7%) and 1 (7.1%), respectively. ESBL production was found in 85.7% of hvKP isolates and most of them carried bla TEM gene (78.6%) and 6 isolates (42.9%) were CR-hvKP. Among hvKP isolates, 1 (7.1%), 2 (14.3%), 3 (21.4%), 8 (28.6%), and 11 (78.6%) carried bla NDM-6, bla OXA-48, bla CTX-M, bla SHV, and bla TEM genes, respectively. According to MLST analysis, 2, 1, 1, and 1 XDR-hvKP isolates belonged to ST15, ST377, ST442, and ST147, respectively. The occurrence of such isolates is deeply concerning due to the combination of hypervirulence and extensively drug-resistance or pandrug-resistance.
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Affiliation(s)
- Sara Davoudabadi
- 1 Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Hossein Goudarzi
- 1 Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mehdi Goudarzi
- 1 Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Abdollah Ardebili
- 2 Department of Microbiology, Faculty of Medicine, Golestan University of Medical Sciences, Gorgan, Iran
| | - Ebrahim Faghihloo
- 1 Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Javad Yasbolaghi Sharahi
- 1 Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Ali Hashemi
- 1 Department of Microbiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Jamshaid MB, Shahzad A, Zafar A, Kamal I. Invasive Klebsiella pneumoniae Syndrome in Qatar: A Case Report. Cureus 2021; 13:e15015. [PMID: 34136314 PMCID: PMC8197630 DOI: 10.7759/cureus.15015] [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] [Indexed: 12/01/2022] Open
Abstract
Klebsiella pneumoniae (K. pneumoniae) is a Gram-negative bacteria that can infect most of the body’s organs, from the lungs to the central nervous system. It is notorious for causing pneumonia in alcoholic, diabetic, and hospitalized patients. It is now emerging as a cause of abscesses involving multiple organs. Invasive K. pneumoniae is most commonly observed in the Asian population but has been reported in other geographical areas as well. We present a case of invasive K. pneumoniae. The patient was initially admitted with diabetic ketoacidosis (DKA); further investigations showed multiple abscesses involving the liver, lungs, brain, and muscles. K. pneumoniae was identified in blood and liver abscess cultures. The patient was managed for DKA as per protocol, and was administered broad-spectrum antibiotics with percutaneous drainage of liver abscess for invasive K. pneumoniae syndrome. In this paper, we highlight the invasive nature of K. pneumoniae, which may aid clinicians in diagnosing and managing similar cases, thereby preventing the associated high morbidity and mortality.
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Affiliation(s)
| | | | | | - Ijaz Kamal
- Internal Medicine, Hamad Medical Corporation, Doha, QAT
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