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Kates AE, Knobloch MJ, Konkel A, Young A, Steinberger A, Shutske J, Ruegg PL, Sethi AK, Goldberg T, Leite de Campos J, Suen G, Safdar N. Wisconsin dairy farm worker perceptions and practices related to antibiotic use, resistance, and infection prevention using a systems engineering framework. PLoS One 2021; 16:e0258290. [PMID: 34914704 PMCID: PMC8675684 DOI: 10.1371/journal.pone.0258290] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Accepted: 09/24/2021] [Indexed: 11/28/2022] Open
Abstract
We studied farmworker practices and beliefs potentially contributing to transmission of bacteria and their associated antibiotic resistance genes (ARGs) among animals and farm workers to identify potential behavioral interventions to reduce the risk of bacterial transmission. Ten focus groups were conducted on eight Wisconsin dairy farms to assess potentially high-risk practices and farmworker knowledge and experiences with antibiotic use and resistance using the Systems Engineering in Patient Safety (SEIPS) framework. Farmworkers were asked to describe common on-farm tasks and the policies guiding these practices. We found workers demonstrated knowledge of the role of antibiotic stewardship in preventing the spread of ARGs. Worker knowledge of various forms of personal protective equipment was higher for workers who commonly reported glove-use. Additionally, workers knowledge regarding the importance of reducing ARG transmission varied but was higher than we had hypothesized. Programs to reduce ARG spread on dairy farms should focus on proper hand hygiene and personal protective equipment use at the level of knowledge, beliefs, and practices.
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Affiliation(s)
- Ashley E. Kates
- Division of Infectious Disease, Department of Medicine, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- William S. Middleton Veterans Affairs Medical Center, Madison, Wisconsin, United States of America
| | - Mary Jo Knobloch
- Division of Infectious Disease, Department of Medicine, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- William S. Middleton Veterans Affairs Medical Center, Madison, Wisconsin, United States of America
| | - Ali Konkel
- Division of Infectious Disease, Department of Medicine, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Amanda Young
- Division of Infectious Disease, Department of Medicine, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Andrew Steinberger
- Department of Bacteriology, College of Agricultural and Life Sciences, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - John Shutske
- Department of Biological Systems Engineering, College of Agricultural and Life Sciences, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Pamela L. Ruegg
- Department of Animal Science, College of Agriculture and Natural Resources, Michigan State University, East Lansing, Michigan, United States of America
| | - Ajay K. Sethi
- Department of Population Health Sciences, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Tony Goldberg
- Department of Pathobiological Sciences, School of Veterinary Medicine, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Juliana Leite de Campos
- Department of Animal Science, College of Agriculture and Natural Resources, Michigan State University, East Lansing, Michigan, United States of America
| | - Garret Suen
- Department of Bacteriology, College of Agricultural and Life Sciences, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
| | - Nasia Safdar
- Division of Infectious Disease, Department of Medicine, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, Wisconsin, United States of America
- William S. Middleton Veterans Affairs Medical Center, Madison, Wisconsin, United States of America
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Lephart P, LeBar W, Newton D. Behind Every Great Infection Prevention Program is a Great Microbiology Laboratory: Key Components and Strategies for an Effective Partnership. Infect Dis Clin North Am 2021; 35:789-802. [PMID: 34362544 DOI: 10.1016/j.idc.2021.04.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
A great clinical microbiology laboratory supporting a great infection prevention program requires focusing on the following services: rapid and accurate identification of pathogens associated with health care-associated infections; asymptomatic surveillance for health care-acquired pathogens before infections arise; routine use of broad and flexible antimicrobial susceptibility testing to direct optimal therapy; implementation of epidemiologic tracking tools to identify outbreaks; development of clear result communication with interpretative comments for clinicians. These goals are best realized in a collaborative relationship with the infection prevention program so that both can benefit from the shared priorities of providing the best patient care.
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Affiliation(s)
- Paul Lephart
- Clinical Microbiology Laboratory, Department of Pathology, University of Michigan Medical School, 2800 Plymouth Road Building 36-1221-52, Ann Arbor, MI 48109-2800, USA.
| | - William LeBar
- Clinical Microbiology Laboratory, Department of Pathology, University of Michigan Medical School, 2800 Plymouth Road Building 36-1221-52, Ann Arbor, MI 48109-2800, USA
| | - Duane Newton
- NaviDx Consulting, Department of Pathology, University of Michigan Medical School, 2800 Plymouth Road Building 36-1221-52, Ann Arbor, MI 48109-2800, USA
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Bartsch SM, Wong KF, Mueller LE, Gussin GM, McKinnell JA, Tjoa T, Wedlock PT, He J, Chang J, Gohil SK, Miller LG, Huang SS, Lee BY. Modeling Interventions to Reduce the Spread of Multidrug-Resistant Organisms Between Health Care Facilities in a Region. JAMA Netw Open 2021; 4:e2119212. [PMID: 34347060 PMCID: PMC8339938 DOI: 10.1001/jamanetworkopen.2021.19212] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
IMPORTANCE Multidrug-resistant organisms (MDROs) can spread across health care facilities in a region. Because of limited resources, certain interventions can be implemented in only some facilities; thus, decision-makers need to evaluate which interventions may be best to implement. OBJECTIVE To identify a group of target facilities and assess which MDRO intervention would be best to implement in the Shared Healthcare Intervention to Eliminate Life-threatening Dissemination of MDROs in Orange County, a large regional public health collaborative in Orange County, California. DESIGN, SETTING, AND PARTICIPANTS An agent-based model of health care facilities was developed in 2016 to simulate the spread of methicillin-resistant Staphylococcus aureus (MRSA) and carbapenem-resistant Enterobacteriaceae (CRE) for 10 years starting in 2010 and to simulate the use of various MDRO interventions for 3 years starting in 2017. All health care facilities (23 hospitals, 5 long-term acute care hospitals, and 74 nursing homes) serving adult inpatients in Orange County, California, were included, and 42 target facilities were identified via network analyses. EXPOSURES Increasing contact precaution effectiveness, increasing interfacility communication about patients' MDRO status, and performing decolonization using antiseptic bathing soap and a nasal product in a specific group of target facilities. MAIN OUTCOMES AND MEASURES MRSA and CRE prevalence and number of new carriers (ie, transmission events). RESULTS Compared with continuing infection control measures used in Orange County as of 2017, increasing contact precaution effectiveness from 40% to 64% in 42 target facilities yielded relative reductions of 0.8% (range, 0.5%-1.1%) in MRSA prevalence and 2.4% (range, 0.8%-4.6%) in CRE prevalence in health care facilities countywide after 3 years, averting 761 new MRSA transmission events (95% CI, 756-765 events) and 166 new CRE transmission events (95% CI, 158-174 events). Increasing interfacility communication of patients' MDRO status to 80% in these target facilities produced no changes in the prevalence or transmission of MRDOs. Implementing decolonization procedures (clearance probability: 39% in hospitals, 27% in long-term acute care facilities, and 3% in nursing homes) yielded a relative reduction of 23.7% (range, 23.5%-23.9%) in MRSA prevalence, averting 3515 new transmission events (95% CI, 3509-3521 events). Increasing the effectiveness of antiseptic bathing soap to 48% yielded a relative reduction of 39.9% (range, 38.5%-41.5%) in CRE prevalence, averting 1435 new transmission events (95% CI, 1427-1442 events). CONCLUSIONS AND RELEVANCE The findings of this study highlight the ways in which modeling can inform design of regional interventions and suggested that decolonization would be the best strategy for the Shared Healthcare Intervention to Eliminate Life-threatening Dissemination of MDROs in Orange County.
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Affiliation(s)
- Sarah M. Bartsch
- Public Health Informatics, Computational, and Operations Research, Graduate School of Public Health and Health Policy, City University of New York, New York, New York
| | - Kim F. Wong
- Center for Simulation and Modeling, University of Pittsburgh, Pittsburgh, Pennsylvania
| | - Leslie E. Mueller
- Public Health Informatics, Computational, and Operations Research, Graduate School of Public Health and Health Policy, City University of New York, New York, New York
| | - Gabrielle M. Gussin
- Division of Infectious Diseases and Health Policy Research Institute, Health School of Medicine, University of California–Irvine, Irvine
| | - James A. McKinnell
- Infectious Disease Clinical Outcomes Research Unit, Lundquist Institute, Harbor-UCLA Medical Center, Torrance, California
- Torrance Memorial Medical Center, Torrance, California
| | - Thomas Tjoa
- Division of Infectious Diseases and Health Policy Research Institute, Health School of Medicine, University of California–Irvine, Irvine
| | - Patrick T. Wedlock
- Public Health Informatics, Computational, and Operations Research, Graduate School of Public Health and Health Policy, City University of New York, New York, New York
| | - Jiayi He
- Division of Infectious Diseases and Health Policy Research Institute, Health School of Medicine, University of California–Irvine, Irvine
| | - Justin Chang
- Division of Infectious Diseases and Health Policy Research Institute, Health School of Medicine, University of California–Irvine, Irvine
| | - Shruti K. Gohil
- Division of Infectious Diseases and Health Policy Research Institute, Health School of Medicine, University of California–Irvine, Irvine
| | | | - Susan S. Huang
- Division of Infectious Diseases and Health Policy Research Institute, Health School of Medicine, University of California–Irvine, Irvine
| | - Bruce Y. Lee
- Public Health Informatics, Computational, and Operations Research, Graduate School of Public Health and Health Policy, City University of New York, New York, New York
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Brêda Mascarenhas LA, Machado BAS, Rodrigues LDAP, Saraiva Hodel KV, Bandeira Santos AÁ, Freitas Neves PR, da Silva Andrade LPC, Soares MB, de Andrade JB, Badaró R. Potential application of novel technology developed for instant decontamination of personal protective equipment before the doffing step. PLoS One 2021; 16:e0250854. [PMID: 34086691 PMCID: PMC8177472 DOI: 10.1371/journal.pone.0250854] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2020] [Accepted: 02/02/2021] [Indexed: 12/14/2022] Open
Abstract
The use of personal protective equipment (PPE) has been considered the most effective way to avoid the contamination of healthcare workers by different microorganisms, including SARS-CoV-2. A spray disinfection technology (chamber) was developed, and its efficacy in instant decontamination of previously contaminated surfaces was evaluated in two exposure times. Seven test microorganisms were prepared and inoculated on the surface of seven types of PPE (respirator mask, face shield, shoe, glove, cap, safety glasses and lab coat). The tests were performed on previously contaminated PPE using a manikin with a motion device for exposure to the chamber with biocidal agent (sodium hypochlorite) for 10 and 30s. In 96.93% of the experimental conditions analyzed, the percentage reduction was >99% (the number of viable cells found on the surface ranged from 4.3x106 to <10 CFU/mL). The samples of E. faecalis collected from the glove showed the lowest percentages reduction, with 86.000 and 86.500% for exposure times of 10 and 30 s, respectively. The log10 reduction values varied between 0.85 log10 (E. faecalis at 30 s in glove surface) and 9.69 log10 (E. coli at 10 and 30 s in lab coat surface). In general, E. coli, S. aureus, C. freundii, P. mirabilis, C. albicans and C. parapsilosis showed susceptibility to the biocidal agent under the tested conditions, with >99% reduction after 10 and 30s, while E. faecalis and P. aeruginosa showed a lower susceptibility. The 30s exposure time was more effective for the inactivation of the tested microorganisms. The results show that the spray disinfection technology has the potential for instant decontamination of PPE, which can contribute to an additional barrier for infection control of healthcare workers in the hospital environment.
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Affiliation(s)
- Luís Alberto Brêda Mascarenhas
- SENAI CIMATEC, SENAI Institute of Innovation (ISI) in Health Advanced Systems (CIMATEC ISI SAS), University Center SENAI/CIMATEC, Salvador, Bahia, Brazil
| | - Bruna Aparecida Souza Machado
- SENAI CIMATEC, SENAI Institute of Innovation (ISI) in Health Advanced Systems (CIMATEC ISI SAS), University Center SENAI/CIMATEC, Salvador, Bahia, Brazil
- SENAI CIMATEC, National Service of Industrial Learning–SENAI, Computational Modeling and Industrial Technology, University Center SENAI/CIMATEC, Salvador, Bahia, Brazil
| | - Leticia de Alencar Pereira Rodrigues
- SENAI CIMATEC, SENAI Institute of Innovation (ISI) in Health Advanced Systems (CIMATEC ISI SAS), University Center SENAI/CIMATEC, Salvador, Bahia, Brazil
| | - Katharine Valéria Saraiva Hodel
- SENAI CIMATEC, SENAI Institute of Innovation (ISI) in Health Advanced Systems (CIMATEC ISI SAS), University Center SENAI/CIMATEC, Salvador, Bahia, Brazil
| | - Alex Álisson Bandeira Santos
- SENAI CIMATEC, National Service of Industrial Learning–SENAI, Computational Modeling and Industrial Technology, University Center SENAI/CIMATEC, Salvador, Bahia, Brazil
| | - Paulo Roberto Freitas Neves
- SENAI CIMATEC, National Service of Industrial Learning–SENAI, Computational Modeling and Industrial Technology, University Center SENAI/CIMATEC, Salvador, Bahia, Brazil
| | - Leone Peter Correia da Silva Andrade
- SENAI CIMATEC, SENAI Institute of Innovation (ISI) in Health Advanced Systems (CIMATEC ISI SAS), University Center SENAI/CIMATEC, Salvador, Bahia, Brazil
| | - Milena Botelho Soares
- SENAI CIMATEC, SENAI Institute of Innovation (ISI) in Health Advanced Systems (CIMATEC ISI SAS), University Center SENAI/CIMATEC, Salvador, Bahia, Brazil
- Gonçalo Moniz Institute, Oswaldo Cruz Foundation (IGM-FIOCRUZ/BA), Salvador, Bahia, Brazil
| | - Jailson Bittencourt de Andrade
- SENAI CIMATEC, SENAI Institute of Innovation (ISI) in Health Advanced Systems (CIMATEC ISI SAS), University Center SENAI/CIMATEC, Salvador, Bahia, Brazil
| | - Roberto Badaró
- SENAI CIMATEC, SENAI Institute of Innovation (ISI) in Health Advanced Systems (CIMATEC ISI SAS), University Center SENAI/CIMATEC, Salvador, Bahia, Brazil
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Souza CM, Madeira-Ott T, Masiero FS, Bunde PRS, Ribeiro GA, Thyssen PJ. Synanthropy of Sarcophaginae (Diptera: Sarcophagidae) From Southern Brazil and Its Sanitary Implications. J Med Entomol 2021; 58:913-920. [PMID: 33145599 DOI: 10.1093/jme/tjaa243] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Indexed: 06/11/2023]
Abstract
Although different feeding habits have been reported for Sarcophaginae (Diptera, Sarcophagidae), most species are associated with decomposing organic matter such as feces and decaying corpses. This study provides the synanthropy index for males of species of Sarcophaginae collected during a 12-mo period in three different environments (urban, rural, and wild) of the state of Rio Grande do Sul, in Southern Brazil, linking this parameter with the sanitary issue. This article also investigated the presence of pathogenic bacteria on the external surface of Oxysarcodexia paulistanensis (Mattos), the most abundant species collected using a sanitized entomological net. Almost all the species collected most abundantly, including O. paulistanensis (n = 241), Ravinia advena (Walker) (n = 87), and O. thornax (Walker) (n = 58), were classified as synanthropic; O. thornax was the species with the highest synanthropy index (+80.3). Escherichia coli (Escherich), Shigella spp. (Enterobacteriaceae), and Staphylococcus aureus (Rosenbach) (Staphylococcaceae) were isolated and identified from the external surface of O. paulistanensis. The isolation and identification of pathogenic bacteria, and their synanthropic behavior, adds weight to potential role of some flesh flies, as O. paulistanensis, in a sanitary context.
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Affiliation(s)
- Carina M Souza
- Faculty of Human Talents, FACTHUS, Campus I, PC, Uberaba, Minas Gerais, Brazil
| | - Tais Madeira-Ott
- Laboratory of Integrative Entomology, Department of Animal Biology, University of Campinas, UNICAMP, PC, Campinas, São Paulo, Brazil
| | - Franciele S Masiero
- Department of Microbiology and Parasitology, Federal University of Pelotas, UFPel, PC, Pelotas, Rio Grande do Sul, Brazil
| | - Paulo R S Bunde
- Department of Microbiology and Parasitology, Federal University of Pelotas, UFPel, PC, Pelotas, Rio Grande do Sul, Brazil
| | - Gladis A Ribeiro
- Department of Microbiology and Parasitology, Federal University of Pelotas, UFPel, PC, Pelotas, Rio Grande do Sul, Brazil
| | - Patricia J Thyssen
- Laboratory of Integrative Entomology, Department of Animal Biology, University of Campinas, UNICAMP, PC, Campinas, São Paulo, Brazil
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O'Connell KA, Tigyi GJ, Livingston RS, Johnson DL, Hamilton DJ. Evaluation of In-cage Filter Paper as a Replacement for Sentinel Mice in the Detection of Murine Pathogens. J Am Assoc Lab Anim Sci 2021; 60:160-167. [PMID: 33629939 PMCID: PMC7974814 DOI: 10.30802/aalas-jaalas-20-000086] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Revised: 08/10/2020] [Accepted: 10/03/2020] [Indexed: 11/05/2022]
Abstract
Recent studies have evaluated alternatives to the use of live animals in colony health monitoring. Currently, an alternative method that is suitable for all rack types and that has been verified to detect the infectious agents most commonly excluded from mouse colonies is unavailable. We compared the use of filter paper placed on the inside floor of mouse cages to the traditional use of sentinel mice in the detection of several prevalent murine pathogens including mouse hepatitis virus (MHV), murine norovirus (MNV), minute virus of mice (MVM), mouse parvovirus (MPV), Theiler murine encephalomyelitis virus (TMEV), Helicobacter spp., Syphacia obvelata, and Aspiculuris tetraptera. Experimental groups comprised 7 cages containing either 2 pieces of filter paper on the cage floor or 2 ICR sentinel mice. Soiled bedding from pet-store mice was transferred to the experimental cages weekly for 8 wk. At 1 and 2 mo after bedding transfer, the filter papers were evaluated by PCR and sentinel mice were tested by serology and fecal PCR. Filter papers detected all pathogens as effectively (MHV, MNV, MPV, MVM, TMEV S. obvelata, and A. tetraptera) or more effectively (Helicobacter spp.) than sentinel mice at both time points. Filter papers more readily detected pathogens with a high copy number per RT-PCR analysis than a low copy number. Helicobacter spp. were not detected by sentinel mice at either time point. These results indicate that the use of filter paper placed on the interior floor of empty mouse cages and exposed to soiled bedding is efficient in detecting bacteria, endoparasites, and most of the common mouse viruses included in an animal health monitoring program.
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Affiliation(s)
- Kathryn A O'Connell
- Departments of Comparative Medicine, University of Tennessee Health Science Center, Memphis, Tennessee;,
| | - Gabor J Tigyi
- Departments of Physiology, University of Tennessee Health Science Center, Memphis, Tennessee
| | | | - Daniel L Johnson
- Department of Molecular Bioinformatics Core, University of Tennessee Health Science Center, Memphis, Tennessee
| | - David J Hamilton
- Departments of Comparative Medicine, University of Tennessee Health Science Center, Memphis, Tennessee
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Rewley J, Koehly L, Marcum CS, Reed-Tsochas F. A passive monitoring tool using hospital administrative data enables earlier specific detection of healthcare-acquired infections. J Hosp Infect 2020; 106:562-569. [PMID: 32745591 PMCID: PMC7395302 DOI: 10.1016/j.jhin.2020.07.031] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Accepted: 07/27/2020] [Indexed: 12/19/2022]
Abstract
BACKGROUND Healthcare-associated infections impose a significant burden on the healthcare system. Current methods for detecting these infections are constrained by combinations of high cost, long processing times and imperfect accuracy, reducing their effectiveness. METHODS This study examined whether the amount of time a patient spends on a ward with other patients clinically suspected of infection, termed 'co-presence', can be used as a tool to predict subsequent healthcare-associated infection. Compared with contact tracing, this leverages passively collected electronic data rather than manually collected data, allowing for improved monitoring. All 133,304 inpatient records between 2011 and 2015 were abstracted from a healthcare system in the UK. The area under the receiver-operator curve (AUROC) for each of five pathogens was calculated based on co-presence time, sensitivity and specificity of the test, and how much earlier co-presence would have predicted infection for the true-positive cases. FINDINGS For the five pathogens, AUROC ranged from 0.92 to 0.99, and was 0.52 for the negative control. Optimal cut-points of co-presence ranged from 25 to 59 h, and would have led to detection of true-positive cases up to an average of 1 day earlier. INTERPRETATION These findings show that co-presence time would help to predict healthcare-acquired infection, and would do so earlier than the current standard of care. Using this measure prospectively in hospitals based on real-time data could limit the consequences of infection, both by being able to treat individual infected patients earlier, and by preventing potential secondary infections stemming from the original infected patient.
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Affiliation(s)
- J Rewley
- National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA; CABDyN Complexity Centre, Saïd Business School, University of Oxford, Oxford, UK.
| | - L Koehly
- National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - C S Marcum
- National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - F Reed-Tsochas
- CABDyN Complexity Centre, Saïd Business School, University of Oxford, Oxford, UK
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Warnecke JM, Pollmann M, Borchardt-Lohölter V, Moreira-Soto A, Kaya S, Sener AG, Gómez-Guzmán E, Figueroa-Hernández L, Li W, Li F, Buska K, Zakaszewska K, Ziolkowska K, Janz J, Ott A, Scheper T, Meyer W. Seroprevalences of antibodies against ToRCH infectious pathogens in women of childbearing age residing in Brazil, Mexico, Germany, Poland, Turkey and China. Epidemiol Infect 2020; 148:e271. [PMID: 33124529 PMCID: PMC7689786 DOI: 10.1017/s0950268820002629] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2020] [Revised: 09/17/2020] [Accepted: 10/26/2020] [Indexed: 12/12/2022] Open
Abstract
Determination of antibodies against ToRCH antigens at the beginning of pregnancy allows assessment of both the maternal immune status and the risks to an adverse pregnancy outcome. Age-standardised seroprevalences were determined in sera from 1009 women of childbearing age residing in Mexico, Brazil, Germany, Poland, Turkey or China using a multiparametric immunoblot containing antigen substrates for antibodies against Toxoplasma gondii, rubella virus, cytomegalovirus (CMV), herpes simplex viruses (HSV-1, HSV-2), Bordetella pertussis, Chlamydia trachomatis, parvovirus B19, Treponema pallidum and varicella zoster virus (VZV). Seroprevalences for antibodies against HSV-1 were >90% in samples from Brazil and Turkey, whereas the other four countries showed lower mean age-adjusted seroprevalences (range: 62.5-87.9%). Samples from Brazilian women showed elevated seroprevalences of antibodies against HSV-2 (40.1%), C. trachomatis (46.8%) and B. pertussis (56.6%) compared to the other five countries. Seroprevalences of anti-T. gondii antibodies (0.5%) and anti-parvovirus B19 antibodies (7.5%) were low in samples from Chinese women, compared to the other five countries. Samples from German women revealed a low age-standardised seroprevalence of anti-CMV antibodies (28.8%) compared to the other five countries. These global differences in immune status of women in childbearing age advocate country-specific prophylaxis strategies to avoid infection with ToRCH pathogens.
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Affiliation(s)
- J. M. Warnecke
- Institute for Experimental Immunology, EUROIMMUN Medizinische Labordiagnostika AG, Lübeck, Germany
| | - M. Pollmann
- Institute for Experimental Immunology, EUROIMMUN Medizinische Labordiagnostika AG, Lübeck, Germany
| | - V. Borchardt-Lohölter
- Institute for Experimental Immunology, EUROIMMUN Medizinische Labordiagnostika AG, Lübeck, Germany
| | - A. Moreira-Soto
- Institute of Virology, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Berlin, Germany
| | - S. Kaya
- Department of Medical Microbiology, İzmir Katip Çelebi University, Ataturk Training and Research Hospital, İzmir, Turkey
| | - A. G. Sener
- Department of Medical Microbiology, İzmir Katip Çelebi University, Ataturk Training and Research Hospital, İzmir, Turkey
| | - E. Gómez-Guzmán
- Department of Science and Biotechnology, INOCHEM S.A. DE C.V., Col. San Miguel Ajusco, Mexico City, Mexico
| | - L. Figueroa-Hernández
- National Institute of Respiratory Diseases, Immunology and Autoimmunity Laboratory, Mexico City, Mexico
| | - W. Li
- EUROIMMUN Medical Diagnostics China Co., Ltd., Beijing, China
| | - F. Li
- EUROIMMUN Medical Diagnostics China Co., Ltd., Beijing, China
| | - K. Buska
- EUROIMMUN Polska Sp. z.o.o., Wroclaw, Poland
| | | | - K. Ziolkowska
- Department of Laboratory Diagnostics, K. Marcinkowski Poznań University of Medical Sciences, Poznan, Poland
- Central Laboratory, Gynaecology and Obstetrics Clinical Hospital Poznan University of Medical Sciences, Poznan, Poland
| | - J. Janz
- Institute for Experimental Immunology, EUROIMMUN Medizinische Labordiagnostika AG, Lübeck, Germany
| | - A. Ott
- Institute for Experimental Immunology, EUROIMMUN Medizinische Labordiagnostika AG, Lübeck, Germany
| | - T. Scheper
- Institute for Experimental Immunology, EUROIMMUN Medizinische Labordiagnostika AG, Lübeck, Germany
| | - W. Meyer
- Institute for Experimental Immunology, EUROIMMUN Medizinische Labordiagnostika AG, Lübeck, Germany
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Chen S, Owolabi Y, Li A, Lo E, Robinson P, Janies D, Lee C, Dulin M. Patch dynamics modeling framework from pathogens' perspective: Unified and standardized approach for complicated epidemic systems. PLoS One 2020; 15:e0238186. [PMID: 33057348 PMCID: PMC7561140 DOI: 10.1371/journal.pone.0238186] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Accepted: 08/11/2020] [Indexed: 11/25/2022] Open
Abstract
Mathematical models are powerful tools to investigate, simulate, and evaluate potential interventions for infectious diseases dynamics. Much effort has focused on the Susceptible-Infected-Recovered (SIR)-type compartment models. These models consider host populations and measure change of each compartment. In this study, we propose an alternative patch dynamic modeling framework from pathogens' perspective. Each patch, the basic module of this modeling framework, has four standard mechanisms of pathogen population size change: birth (replication), death, inflow, and outflow. This framework naturally distinguishes between-host transmission process (inflow and outflow) and within-host infection process (replication) during the entire transmission-infection cycle. We demonstrate that the SIR-type model is actually a special cross-sectional and discretized case of our patch dynamics model in pathogens' viewpoint. In addition, this patch dynamics modeling framework is also an agent-based model from hosts' perspective by incorporating individual host's specific traits. We provide an operational standard to formulate this modular-designed patch dynamics model. Model parameterization is feasible with a wide range of sources, including genomics data, surveillance data, electronic health record, and from other emerging technologies such as multiomics. We then provide two proof-of-concept case studies to tackle some of the existing challenges of SIR-type models: sexually transmitted disease and healthcare acquired infections. This patch dynamics modeling framework not only provides theoretical explanations to known phenomena, but also generates novel insights of disease dynamics from a more holistic viewpoint. It is also able to simulate and handle more complicated scenarios across biological scales such as the current COVID-19 pandemic.
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Affiliation(s)
- Shi Chen
- Department of Public Health Sciences, University of North Carolina Charlotte, Charlotte, NC, United States of America
- School of Data Science, University of North Carolina Charlotte, Charlotte, NC, United States of America
| | - Yakubu Owolabi
- Department of Public Health Sciences, University of North Carolina Charlotte, Charlotte, NC, United States of America
- Division of HIV and TB, Centers for Disease Control and Prevention, Atlanta, GA, United States of America
| | - Ang Li
- State Key Laboratory of Vegetation and Environmental Change, Chinese Academy of Sciences, Beijing, China
| | - Eugenia Lo
- Department of Biological Sciences, University of North Carolina Charlotte, Charlotte, NC, United States of America
| | - Patrick Robinson
- Department of Public Health Sciences, University of North Carolina Charlotte, Charlotte, NC, United States of America
- Academy of Population Health Innovation, University of North Carolina Charlotte, Charlotte, NC, United States of America
| | - Daniel Janies
- Department of Bioinformatics, University of North Carolina Charlotte, Charlotte, NC, United States of America
| | - Chihoon Lee
- School of Business, Stevens Institute of Technology, Hoboken, NJ, United States of America
| | - Michael Dulin
- Department of Public Health Sciences, University of North Carolina Charlotte, Charlotte, NC, United States of America
- Academy of Population Health Innovation, University of North Carolina Charlotte, Charlotte, NC, United States of America
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12
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Patel RK, Shackelford IA, Priddy MC, Kopechek JA. Effect of speech volume on respiratory emission of oral bacteria as a potential indicator of pathogen transmissibility risk. J Acoust Soc Am 2020; 148:2322. [PMID: 33138475 PMCID: PMC7861351 DOI: 10.1121/10.0002278] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 09/30/2020] [Accepted: 10/01/2020] [Indexed: 06/11/2023]
Abstract
Respiratory droplets emitted during speech can transmit oral bacteria and infectious viruses to others, including COVID-19. Loud speech can generate significantly higher numbers of potentially infectious respiratory droplets. This study assessed the effect of speech volume on respiratory emission of oral bacteria as an indicator of potential pathogen transmission risk. Loud speech (average 83 dBA, peak 94 dBA) caused significantly higher emission of oral bacteria (p = 0.004 compared to no speech) within 1 ft from the speaker. N99 respirators and simple cloth masks both significantly reduced emission of oral bacteria. This study demonstrates that loud speech without face coverings increases emission of respiratory droplets that carry oral bacteria and may also carry other pathogens such as COVID-19.
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Affiliation(s)
- Riyakumari K Patel
- Department of Bioengineering, University of Louisville, Louisville, Kentucky 40292, USA
| | - Isis A Shackelford
- Department of Bioengineering, University of Louisville, Louisville, Kentucky 40292, USA
| | - Mariah C Priddy
- Department of Bioengineering, University of Louisville, Louisville, Kentucky 40292, USA
| | - Jonathan A Kopechek
- Department of Bioengineering, University of Louisville, Louisville, Kentucky 40292, USA
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13
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Affiliation(s)
- Omoshola Aleru
- Institute of Ecology & Evolution, University of Oregon, Eugene, Oregon, United States of America
- Department of Biology, University of Oregon, Eugene, Oregon, United States of America
| | - Matthew F. Barber
- Institute of Ecology & Evolution, University of Oregon, Eugene, Oregon, United States of America
- Department of Biology, University of Oregon, Eugene, Oregon, United States of America
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14
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Gordon J, Darlington O, McEwan P, Lumley M, Taie A, Hicks M, Charbonneau C, Blake A, Hawkins N, Goldenberg S, Otter J, Wilcox M. Estimating the Value of New Antimicrobials in the Context of Antimicrobial Resistance: Development and Application of a Dynamic Disease Transmission Model. Pharmacoeconomics 2020; 38:857-869. [PMID: 32249396 DOI: 10.1007/s40273-020-00906-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
OBJECTIVES Antimicrobial resistance (AMR) represents a significant threat to patient and population health. The study aim was to develop and validate a model of AMR that defines and quantifies the value of new antibiotics. METHODS A dynamic disease transmission and cost-effectiveness model of AMR consisting of three components (disease transmission, treatment pathway and optimisation) was developed to evaluate the health economic value of new antibiotics. The model is based on the relationship between AMR, antimicrobial availability and consumption. Model analysis explored the impact of different antibiotic treatment strategies on the development of AMR, patient and population estimates of health benefit, across three common treatment indications and pathogens in the UK. RESULTS Population-level resistance to existing antimicrobials was estimated to increase from 10.3 to 16.1% over 10 years based on current antibiotic availability and consumption. In comparison, the diversified use of a new antibiotic was associated with significant reduction in AMR (12.8% vs. 16.1%) and quality-adjusted life year (QALY) gains at a patient (7.7-10.3, dependent on antimicrobial efficacy) and population level (3657-8197, dependent on antimicrobial efficacy and the prevalence of AMR). Validation across several real-world data sources showed that the model output does not tend to systematically under- or over-estimate observed data. CONCLUSIONS The development of new antibiotics and the appropriate use of existing antibiotics are key to addressing the threat of AMR. This study presents a validated model that quantifies the value of new antibiotics through clinical and economic outcomes of relevance, and accounts for disease transmission of infection and development of AMR. In this context, the model may be a useful tool that could contribute to the decision-making process alongside other potential models and expert advice.
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Affiliation(s)
- Jason Gordon
- Health Economics and Outcomes Research Limited, Birmingham, UK.
| | | | - Phil McEwan
- Health Economics and Outcomes Research Limited, Cardiff, UK
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15
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Abstract
Microorganisms vehiculated by food might benefit health, cause minimal change within the equilibrium of the host microbial community or be associated with foodborne diseases. In this chapter we will focus on human pathogenic bacteria for which food is conclusively demonstrated as their transmission mode to human. We will describe the impact of foodborne diseases in public health, the reservoirs of foodborne pathogens (the environment, human and animals), the main bacterial pathogens and food vehicles causing human diseases, and the drivers for the transmission of foodborne diseases related to the food-chain, host or bacteria features. The implication of food-chain (foodborne pathogens and commensals) in the transmission of resistance to antibiotics relevant to the treatment of human infections is also evidenced. The multiplicity and interplay of drivers related to intensification, diversification and globalization of food production, consumer health status, preferences, lifestyles or behaviors, and bacteria adaptation to different challenges (stress tolerance and antimicrobial resistance) from farm to human, make the prevention of bacteria-food-human transmission a modern and continuous challenge. A global One Health approach is mandatory to better understand and minimize the transmission pathways of human pathogens, including multidrug-resistant pathogens and commensals, through food-chain.
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Affiliation(s)
- Patrícia Antunes
- Faculdade de Ciências da Nutrição e Alimentação, Universidade do Porto, Porto, Portugal
| | - Carla Novais
- Faculdade de Farmácia, Universidade do Porto, Porto, Portugal
| | - Luísa Peixe
- Faculdade de Farmácia, Universidade do Porto, Porto, Portugal
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16
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Perez-Sancho M, García-Seco T, Porrero C, García N, Gomez-Barrero S, Cámara JM, Domínguez L, Álvarez J. A ten-year-surveillance program of zoonotic pathogens in feral pigeons in the City of Madrid (2005-2014): The importance of a systematic pest control. Res Vet Sci 2019; 128:293-298. [PMID: 31869595 DOI: 10.1016/j.rvsc.2019.12.006] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2019] [Revised: 10/28/2019] [Accepted: 12/03/2019] [Indexed: 01/27/2023]
Abstract
Feral pigeons have increased in urban settings worldwide becoming a potential health risk for humans and other animals. Control and surveillance programs are essential to prevent the possible transmission of zoonotic pathogens carried by pigeons. A surveillance program was carried out in Madrid City (Spain) during 2005-2014 to determine the role of urban pigeons as carriers of zoonotic agents comparing these results with studies performed elsewhere in the last fifteen years. A total of 1372 pigeons were randomly captured and tested for detection of Antimicrobial susceptibility and genetic heterogeneity of Campylobacter and Salmonella isolates were determined. During the first phase (August 2005-July 2010), 428 animals were analyzed individually, while in the second period (August 2010-December 2014), 944 pigeons were analyzed in pools (n = 2-3 in 2010 and n = 5-6 in 2013 and 2014). The most prevalent pathogen during the first phase was Campylobacter spp., (6.57%, 95% confidence interval 3.05-12.10%) followed by Salmonella spp. (4.41%, 95% CI: 2.30-7.58%) and C. psittaci (2.56%, 95% CI: 0.70-6.53%)]. The PCR techniques, used during the 2010-2014 phase of the study, confirmed the presence of Campylobacter spp. (prevalence of 0-14.83%) and C. psittaci (0-12,94%) among pigeons of Madrid. Antimicrobial susceptibility testing suggested low levels of resistance. Presence of zoonotic agents in feral pigeons highlights the importance of surveillance programs on this species, although the relative low prevalence found suggests a limited risk to Public and Animal Health in Madrid.
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Affiliation(s)
- Marta Perez-Sancho
- VISAVET Health Surveillance Centre. Universidad Complutense de Madrid, Madrid, Spain.
| | - Teresa García-Seco
- VISAVET Health Surveillance Centre. Universidad Complutense de Madrid, Madrid, Spain
| | - Concepción Porrero
- VISAVET Health Surveillance Centre. Universidad Complutense de Madrid, Madrid, Spain
| | - Nerea García
- VISAVET Health Surveillance Centre. Universidad Complutense de Madrid, Madrid, Spain
| | - Susana Gomez-Barrero
- VISAVET Health Surveillance Centre. Universidad Complutense de Madrid, Madrid, Spain
| | - Jose María Cámara
- Unidad Técnica de Control de Vectores, Ayuntamiento de Madrid, Madrid, Spain
| | - Lucas Domínguez
- VISAVET Health Surveillance Centre. Universidad Complutense de Madrid, Madrid, Spain; Departamento de Sanidad Animal, Facultad de Veterinaria, Universidad Complutense de Madrid, Madrid, Spain
| | - Julio Álvarez
- VISAVET Health Surveillance Centre. Universidad Complutense de Madrid, Madrid, Spain; Departamento de Sanidad Animal, Facultad de Veterinaria, Universidad Complutense de Madrid, Madrid, Spain
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17
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Mody L, Washer LL, Kaye KS, Gibson K, Saint S, Reyes K, Cassone M, Mantey J, Cao J, Altamimi S, Perri M, Sax H, Chopra V, Zervos M. Multidrug-resistant Organisms in Hospitals: What Is on Patient Hands and in Their Rooms? Clin Infect Dis 2019; 69:1837-1844. [PMID: 30980082 PMCID: PMC6853699 DOI: 10.1093/cid/ciz092] [Citation(s) in RCA: 41] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2018] [Indexed: 01/23/2023] Open
Abstract
BACKGROUND The impact of healthcare personnel hand contamination in multidrug-resistant organism (MDRO) transmission is important and well studied; however, the role of patient hand contamination needs to be characterized further. METHODS Patients from 2 hospitals in southeast Michigan were recruited within 24 hours of arrival to their room and followed prospectively using microbial surveillance of nares, dominant hand, and 6 high-touch environmental surfaces. Sampling was performed on admission, days 3 and 7, and weekly until discharge. Paired samples of methicillin-resistant Staphylococcus aureus (MRSA) isolated from the patients' hand and room surfaces were evaluated for relatedness using pulsed-field gel electrophoresis and staphylococcal cassette chromosome mec, and Panton-Valentine leukocidin typing. RESULTS A total of 399 patients (mean age, 60.8 years; 49% male) were enrolled and followed for 710 visits. Fourteen percent (n = 56/399) of patients were colonized with an MDRO at baseline; 10% (40/399) had an MDRO on their hands. Twenty-nine percent of rooms harbored an MDRO. Six percent (14/225 patients with at least 2 visits) newly acquired an MDRO on their hands during their stay. New MDRO acquisition in patients occurred at a rate of 24.6/1000 patient-days, and in rooms at a rate of 58.6/1000 patient-days. Typing demonstrated a high correlation between MRSA on patient hands and room surfaces. CONCLUSIONS Our data suggest that patient hand contamination with MDROs is common and correlates with contamination on high-touch room surfaces. Patient hand hygiene protocols should be considered to reduce transmission of pathogens and healthcare-associated infections.
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Affiliation(s)
- Lona Mody
- Department of Internal Medicine, Division of Geriatric and Palliative Medicine, University of Michigan Medical School, Detroit, Michigan
- Geriatrics Research Education and Clinical Center, Veterans Affairs Ann Arbor Healthcare System, Detroit, Michigan
| | - Laraine L Washer
- Department of Infection Prevention and Epidemiology, Michigan Medicine, Detroit, Michigan
- Department of Internal Medicine, Division of Infectious Diseases, University of Michigan Health System, Detroit, Michigan
| | - Keith S Kaye
- Department of Internal Medicine, Division of Infectious Diseases, University of Michigan Health System, Detroit, Michigan
| | - Kristen Gibson
- Department of Internal Medicine, Division of Geriatric and Palliative Medicine, University of Michigan Medical School, Detroit, Michigan
| | - Sanjay Saint
- Patient Safety Enhancement Program and Center for Clinical Management Research, Veterans Affairs Ann Arbor Healthcare System, Detroit, Michigan
- Division of Hospital Medicine, Department of Medicine, University of Michigan Health System, Ann Arbor, Detroit, Michigan
| | - Katherine Reyes
- Division of Infectious Diseases, Henry Ford Health System, Detroit, Michigan
| | - Marco Cassone
- Department of Internal Medicine, Division of Geriatric and Palliative Medicine, University of Michigan Medical School, Detroit, Michigan
| | - Julia Mantey
- Department of Internal Medicine, Division of Geriatric and Palliative Medicine, University of Michigan Medical School, Detroit, Michigan
| | - Jie Cao
- Department of Internal Medicine, Division of Geriatric and Palliative Medicine, University of Michigan Medical School, Detroit, Michigan
| | - Sarah Altamimi
- Division of Infectious Diseases, Henry Ford Health System, Detroit, Michigan
| | - Mary Perri
- Division of Infectious Diseases, Henry Ford Health System, Detroit, Michigan
| | - Hugo Sax
- Division of Infectious Diseases and Hospital Epidemiology, University Hospital Zurich, University of Zurich, Switzerland
| | - Vineet Chopra
- Patient Safety Enhancement Program and Center for Clinical Management Research, Veterans Affairs Ann Arbor Healthcare System, Detroit, Michigan
- Division of Hospital Medicine, Department of Medicine, University of Michigan Health System, Ann Arbor, Detroit, Michigan
| | - Marcus Zervos
- Division of Infectious Diseases, Henry Ford Health System, Detroit, Michigan
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18
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Nasirian H. Contamination of Cockroaches (Insecta: Blattaria) by Medically Important Bacteriae: A Systematic Review and Meta-analysis. J Med Entomol 2019; 56:1534-1554. [PMID: 31219601 DOI: 10.1093/jme/tjz095] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Indexed: 06/09/2023]
Abstract
Cockroaches have the potential to disseminate bacteria in their environments and therefore a systematic review and meta-analysis was conducted to assess the state-of-the-art of our knowledge regarding bacterial contaminants of cockroaches. At least 78 bacterial species and 42 genera from 24 families and 11 orders of bacteria were reported to have contaminated cockroaches. At least 61, 42, 12, 13, 7, and 16 bacterial species have contaminated Blattella germanica (L.) (Blattaria: Ectobiidae), Periplaneta americana (L.) (Blattaria: Blattidae), Blatta orientalis (L.) (Blattaria: Blattidae), Diploptera punctata (Eschscholtz) (Blattaria: Blaberidae), Periplaneta fuliginosa (Serville) (Blattaria: Blattidae), and Supella longipalpa (F.) (Blattaria: Ectobiidae), respectively. Blattella germanica is the most commonly contaminated cockroach species, with the widest bacterial species diversity that threatens human health, followed by P. americana. Cockroach bacterial contaminants may result in the dissemination of opportunistic or pathogenic infections, particularly nosocomial and foodborne infections. One-way analysis of variance (ANOVA) revealed significant differences between bacterial contaminant species of cockroaches, species of cockroaches with bacterial contaminants, cockroach body part surfaces from the point of view bacterial contaminants and countries of cockroach infested with bacterial contaminants (P < 0.05). This statistical analysis indicates that the bacterial contaminants of the external cockroach body parts are potentially more harmful than from internal surfaces, and secondly, the bacterial contaminants of cockroaches in hospital environments are potentially more harmful than from other human environments. The survey indicated that the bacterial contaminant species of cockroaches appear to be mostly multiple drug resistant. The challenges of cockroaches as being potential vectors of pathogenic or opportunistic agents of human infections are discussed.
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Affiliation(s)
- Hassan Nasirian
- Department of Medical Entomology and Vector Control, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran
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19
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Azari-Hamidian S, Norouzi B, Harbach RE. A detailed review of the mosquitoes (Diptera: Culicidae) of Iran and their medical and veterinary importance. Acta Trop 2019; 194:106-122. [PMID: 30898616 DOI: 10.1016/j.actatropica.2019.03.019] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2018] [Revised: 03/13/2019] [Accepted: 03/13/2019] [Indexed: 11/27/2022]
Abstract
Mosquitoes (Diptera: Culicidae) are the most significant arthropods of medical importance because of the burden of diseases, such as malaria, encephalitis and filariasis, which are caused by pathogens and parasites they transmit to humans. In 2007, the most recently published checklist of Iranian mosquitoes included 64 species representing seven genera. Public databases were searched to the end of August 2018 for publications concerning the diseases in Iran caused by mosquito-borne pathogens. Pertinent information was extracted and analyzed, and the checklist of Iranian mosquitoes was updated. Six arboviral diseases, two bacterial diseases, four helminthic diseases and two protozoal diseases occur in Iran. The agents of these diseases are biologically or mechanically known or assumed to be transmitted by mosquitoes. The updated checklist of Iranian mosquitoes includes 69 species representing seven or 11 genera depending on the generic classification of aedines. There is no published information about the role of mosquitoes in the transmission of the causal agents of avian malaria, avian pox, bovine ephemeral fever, dengue fever, Rift Valley fever, Sindbis fever, Deraiophoronema evansi infection, lymphatic filariasis, anthrax and tularemia in Iran. There is just one imported case of lymphatic filariasis, which is not endemic in the country. It seems arthropods do not play an important role in the epidemiology of anthrax and ixodid ticks are the main vectors of the tularemia bacterium. In view of the recent finding of only a few adults and larvae of Aedes albopictus in southeastern Iran and the absence of Ae. aegypti, it is not possible to infer the indigenous transmission of the dengue fever virus in Iran. Considering the importance of mosquito-borne diseases in the country, it is necessary to improve vector and vector-borne disease surveillance in order to apply the best integrated vector management interventions as a part of the One Health concept.
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Affiliation(s)
- Shahyad Azari-Hamidian
- Research Center of Health and Environment, Guilan University of Medical Sciences, Rasht, Iran; School of Health, Guilan University of Medical Sciences, Rasht, Iran.
| | - Behzad Norouzi
- Research Center of Health and Environment, Guilan University of Medical Sciences, Rasht, Iran
| | - Ralph E Harbach
- Department of Life Sciences, Natural History Museum, London, UK
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Abstract
In this paper, we propose an SIS-type reaction-diffusion equations, which contains both direct transmission and indirect transmission via free-living and spatially diffusive bacteria/virus in the contaminated environment, motivated by the dynamics of hospital infections. We establish the basic reproduction number R₀ which can act as threshold level to determine whether the disease persists or not. In particular, if R₀<1 then="" the="" disease-free="" equilibrium="" is="" globally="" asymptotically="" stable="" whereas="". For the spatially homogeneous system, we investigate the traveling wave solutions and obtain that there exists a critical wave speed, below which there has no traveling waves, above which the traveling wave solutions may exist for small diffusion coefficient by the geometric singular perturbation method. The finding implies that great spatial transmission leads to an increase in new infection, while large diffusion of bacteria/virus results in the new infection decline for spatially heterogeneous environment.
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Affiliation(s)
- Dan Feng Pang
- School of Mathematics and Statistics, Xi'an Jiaotong University, Xi'an 710049, P.R. China
| | - Yan Ni Xiao
- School of Mathematics and Statistics, Xi'an Jiaotong University, Xi'an 710049, P.R. China
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21
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Ritter GD, Acuff GR, Bergeron G, Bourassa MW, Chapman BJ, Dickson JS, Opengart K, Salois MJ, Singer RS, Storrs C. Antimicrobial-resistant bacterial infections from foods of animal origin: understanding and effectively communicating to consumers. Ann N Y Acad Sci 2019; 1441:40-49. [PMID: 30924543 PMCID: PMC6850152 DOI: 10.1111/nyas.14091] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 03/15/2019] [Accepted: 03/18/2019] [Indexed: 11/29/2022]
Abstract
Consumers are increasingly interested in the attributes of the food they consume. This includes what is in the food and how it was raised; and at least some consumers are willing to pay a premium for products with specific attributes. However, the current plethora of labels on the market does not adequately address this issue; rather than providing actionable information, most labels add to the consumer confusion. In addition, there is a tendency toward "absence labels" that can contribute to a negative consumer perception of conventional products that may or may not include the attribute in question. Communication with consumers about the complex and highly technical issue of antimicrobial resistance (AMR) is challenging, and experiences from communication efforts about food safety-related issues demonstrate exactly how challenging this is to communicate clearly. General lessons learned from the science of risk communication can help guide efforts to communicate about the challenging issue of AMR. There are efforts underway to chart out a new approach. A new labeled animal production certification program is under development to provide choice for consumers, while reducing consumer confusion, which mandates antibiotic stewardship practices.
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Affiliation(s)
| | - Gary R. Acuff
- Department of Nutrition and Food ScienceTexas A&M UniversityCollege StationTexas
| | | | | | - Benjamin J. Chapman
- Department of Agricultural and Human SciencesNorth Carolina State UniversityRaleighNorth Carolina
| | | | | | | | - Randall S. Singer
- Department of Veterinary and Biomedical SciencesUniversity of MinnesotaSt. PaulMinnesota
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Chan KM, Cheng CH, Wu TH, Lee CF, Wu TJ, Chou HS, Lee WC. Impact of donor with evidence of bacterial infections on deceased donor liver transplantation: a retrospective observational cohort study in Taiwan. BMJ Open 2019; 9:e023908. [PMID: 30904845 PMCID: PMC6475220 DOI: 10.1136/bmjopen-2018-023908] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
OBJECTIVE The shortage of available donor organs is an unsolvable concern leading to an expansion in the donor criteria for organ transplantation. Here, we describe our experience and assess the outcomes in recipients who obtained a graft from a donor with bacterial infections in deceased donor liver transplantation (DDLT). METHODS All DDLTs between January 1991 and February 2017 were retrospectively reviewed. Patients were categorised into two groups based on the recipients who obtained a graft from a donor with (group I) or without (group II) evidence of bacterial infections. Outcomes and bacterial infections were compared between the two groups of recipients. RESULTS Overall, a total of 285 DDLTs were performed from 248 donors consisting of 48 split liver grafts and 208 whole liver grafts. Of those, 98 recipients (group I, 34.3%) were transplanted with a graft from 78 donors with positive bacterial cultures. Donor sputum cultures had the highest rate of positive bacterial growth, accounting for 26.6% of donors. Overall survival (OS) was not significantly different between the two groups (p=0.9746). The OS rates at 1 and 3 years were 73.5% and 69.2%, respectively, in the group I recipients versus 68.8% and 62.4% in the group II recipients. Importantly, no hospital mortality was related to donor-derived bacterial infections. CONCLUSION Transmission of bacteria from the donor to the recipient is infrequent in DDLT. Therefore, potential donors with positive bacterial infections should not be excluded for organ transplantation to increase organ availability and ameliorate the organ shortage.
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Affiliation(s)
- Kun-Ming Chan
- Department of General Surgery, Chang Gung Memorial Hospital Linkou Branch, Taoyuan city, Taiwan
| | - Chih-Hsien Cheng
- Department of General Surgery, Chang Gung Memorial Hospital Linkou Branch, Taoyuan city, Taiwan
| | - Tsung-Han Wu
- Department of General Surgery, Chang Gung Memorial Hospital Linkou Branch, Taoyuan city, Taiwan
| | - Chen-Fang Lee
- Department of General Surgery, Chang Gung Memorial Hospital Linkou Branch, Taoyuan city, Taiwan
| | - Ting-Jung Wu
- Department of General Surgery, Chang Gung Memorial Hospital Linkou Branch, Taoyuan city, Taiwan
| | - Hong-Shiue Chou
- Department of General Surgery, Chang Gung Memorial Hospital Linkou Branch, Taoyuan city, Taiwan
| | - Wei-Chen Lee
- Department of General Surgery, Chang Gung Memorial Hospital Linkou Branch, Taoyuan city, Taiwan
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23
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Shastay A. Unsafe Practice Continues: Reuse of a Saline Flush Syringe. Home Healthc Now 2019; 37:176-177. [PMID: 31058738 DOI: 10.1097/nhh.0000000000000784] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Affiliation(s)
- Ann Shastay
- Ann Shastay, MSN, RN, AOCN, is the Managing Editor, Institute for Safe Medication Practices, Horsham, Pennsylvania
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Abstract
One Health is an effective approach for the management of zoonotic disease in humans, animals and environments. Examples of the management of bacterial zoonoses in Europe and across the globe demonstrate that One Health approaches of international surveillance, information-sharing and appropriate intervention methods are required to successfully prevent and control disease outbreaks in both endemic and non-endemic regions. Additionally, a One Health approach enables effective preparation and response to bioterrorism threats.
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Affiliation(s)
- Alice R Cross
- Living Systems Institute, College of Life and Environmental Sciences, University of Exeter, Exeter EX4 4QD United Kingdom.
| | - Victoria M Baldwin
- Defence Science and Technology Laboratory, Porton Down, Salisbury SP4 0JQ United Kingdom
| | - Sumita Roy
- Living Systems Institute, College of Life and Environmental Sciences, University of Exeter, Exeter EX4 4QD United Kingdom
| | | | - Joann L Prior
- Living Systems Institute, College of Life and Environmental Sciences, University of Exeter, Exeter EX4 4QD United Kingdom; Defence Science and Technology Laboratory, Porton Down, Salisbury SP4 0JQ United Kingdom; London School of Hygiene & Tropical Medicine, Kepple Street, London WC1E 7HT United Kingdom
| | - Nicholas J Harmer
- Living Systems Institute, College of Life and Environmental Sciences, University of Exeter, Exeter EX4 4QD United Kingdom
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Prioli KM, Karp JK, Lyons NM, Chrebtow V, Herman JH, Pizzi LT. Economic Implications of Pathogen Reduced and Bacterially Tested Platelet Components: A US Hospital Budget Impact Model. Appl Health Econ Health Policy 2018; 16:889-899. [PMID: 30062464 PMCID: PMC6244623 DOI: 10.1007/s40258-018-0409-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
BACKGROUND US FDA draft guidance includes pathogen reduction (PR) or secondary rapid bacterial testing (RT) in its recommendations for mitigating risk of platelet component (PC) bacterial contamination. An interactive budget impact model was created for hospitals to use when considering these technologies. METHODS A Microsoft Excel model was built and populated with base-case costs and probabilities identified through literature search and a survey of US hospital transfusion service directors. Annual costs of PC acquisition, testing, wastage, dispensing/transfusion, sepsis, shelf life, and reimbursement for a mid-sized hospital that purchases all of its PCs were compared for four scenarios: 100% conventional PCs (C-PC), 100% RT-PC, 100% PR-PC, and 50% RT-PC/50% PR-PC. RESULTS Annual total costs were US$3.64, US$3.67, and US$3.96 million when all platelets were C-PC, RT-PC, or PR-PC, respectively, or US$3.81 million in the 50% RT-PC/50% PR-PC scenario. The annual net cost of PR-PC, obtained by subtracting annual reimbursements from annual total costs, is 6.18% above that of RT-PC. Maximum usable shelf lives for C-PC, RT-PC, and PR-PC are 3.0, 5.0, and 3.6 days, respectively; hospitals obtain PR-PC components earliest at 1.37 days. CONCLUSION The model predicts minimal cost increase for PR-PC versus RT-PC, including cost offsets such as elimination of bacterial detection and irradiation, and reimbursement. Additional safety provided by PR, including risk mitigation of transfusion-transmission of a broad spectrum of viruses, parasites, and emerging pathogens, may justify this increase. Effective PC shelf life may increase with RT, but platelets can be available sooner with PR due to elimination of bacterial detection, depending on blood center logistics.
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Affiliation(s)
- Katherine M. Prioli
- Center for Health Outcomes, Policy, and Economics, Rutgers University, 160 Frelinghuysen Road, Suite 417, Piscataway, NJ 08854 USA
| | - Julie Katz Karp
- Department of Pathology, Anatomy, and Cell Biology, Thomas Jefferson University Hospital, 111 South 11th Street, Philadelphia, PA 19107 USA
| | - Nina M. Lyons
- Thomas Jefferson University, 901 Walnut Street, Suite 901, Philadelphia, PA 19107 USA
| | - Vera Chrebtow
- Global Marketing and Communications, Cerus Corporation, 2550 Stanwell Drive, Concord, CA 94520 USA
| | - Jay H. Herman
- Department of Pathology, Anatomy, and Cell Biology, Thomas Jefferson University Hospital, 111 South 11th Street, Philadelphia, PA 19107 USA
| | - Laura T. Pizzi
- Center for Health Outcomes, Policy, and Economics, Rutgers University, 160 Frelinghuysen Road, Suite 417, Piscataway, NJ 08854 USA
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Abstract
BACKGROUND Bites with tick-borne pathogens can cause various bacterial, viral, or parasitic diseases in humans. Tick-transmitted diseases are known as contributing factors to the increasing incidence and burden of diseases. The present article investigated the epidemiology of tick-borne diseases in South Korea. METHODS The incidence and distribution of common tick-borne diseases in Korea (Lyme disease, Q fever, and severe fever with thrombocytopenia syndrome [SFTS]) were investigated and analyzed, using data from the Korea Centers for Disease Control and Prevention (KCDC) infectious disease reporting system. A literature review was compiled on the current status of uncommon tick-borne diseases (Rickettsia, anaplasmosis, ehrlichiosis, bartonellosis, tularemia, tick-borne encephalitis, and babesiosis). RESULTS AND CONCLUSIONS In South Korea, SFTS is an emerging disease, showing a rapid increase in reports since 2012, with high mortality. Likewise, reports of Lyme disease and Q fever cases have also been rapidly increasing during 2012-2017, although caution should be taken when interpreting these results, considering the likely influence of increased physician awareness and reporting of these diseases. Other tick-borne diseases reported in South Korea included spotted fever group rickettsiae, anaplasmosis, ehrlichiosis, tularemia, Bartonella, and babesiosis. Evidences on human infection with tick-borne encephalitis virus and Crimean-Congo hemorrhagic fever were recently unavailable, but both need constant monitoring.
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Affiliation(s)
- Jae Hyoung Im
- 1 Department of Internal Medicine and Inha University School of Medicine, Incheon, Republic of Korea
| | - JiHyeon Baek
- 1 Department of Internal Medicine and Inha University School of Medicine, Incheon, Republic of Korea
| | - Areum Durey
- 2 Department of Emergency Medicine, Inha University School of Medicine, Incheon, Republic of Korea
| | - Hea Yoon Kwon
- 1 Department of Internal Medicine and Inha University School of Medicine, Incheon, Republic of Korea
| | - Moon-Hyun Chung
- 3 Department of Internal Medicine, Jeju University Hospital, Jeju, Republic of Korea
| | - Jin-Soo Lee
- 1 Department of Internal Medicine and Inha University School of Medicine, Incheon, Republic of Korea
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Abstract
Ticks are known as vectors of a wide range of pathogens of medical and veterinary importance; some of them of zoonotic concern constitute a hazard for the emergence of tick-borne diseases shared between humans and domestic animals and becoming a part of the 'One Health' concept. Canine and feline tick-borne diseases have emerged in recent years, performing an extensive geographic distribution and enlarged global prevalence. The present review focuses on the recent epidemiological studies on the emergence of tick-borne bacterial pathogens in dogs and cats, and the discussion whether pet ownership increases the risk of tick-borne diseases. A lot of data provide confirmation that dogs and cats themselves may substantially contribute to the circulation of the ticks and tick-borne bacterial pathogens in the environment. Molecular diagnostics of tick-borne pathogens infections generates a lot of problems like the choice of molecular methods and molecular markers for the detection of bacterial genomic DNA, but play an important role in the diagnosis of infections. The study provides some insight into molecular diagnostic techniques and new potentially recognized bacterial pathogens of this group. Protecting human and companion animal health from vector-borne infections requires controlling vector populations, containing development of novel, practicable strategies that will limit vectors and transmission of vector-borne disease pathogens.
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Kramer A, Pochhammer J, Walger P, Seifert U, Ruhnke M, Harnoss JC. [Spectrum of pathogens in postoperative complications of visceral surgery : The problem of multidrug resistance]. Chirurg 2018; 88:369-376. [PMID: 28229205 DOI: 10.1007/s00104-017-0382-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
In general surgery the etiology of surgical site infections has not significantly changed over the last 30 years. Gram-positive bacteria, e.g. coagulase negative staphylococci (CNS), Staphylococcus aureus and Enterococcus spp. as well as Gram-negative bacteria, e.g. Escherichia coli, Enterobacter spp., Klebsiella spp. and Pseudomonas aeruginosa, are the most common findings. Although in general surgery 10% of the S. aureus causing postoperative wound infections were methicillin resistant (MRSA), no cases of multidrug-resistant Gram-negative (MRGN) bacteria were reported. Yeasts (particularly Candida spp.) are rarely the pathogen causing surgical site infections (≤3%) and concomitant risk factors are typical (e.g. diabetes, chemotherapy, immunosuppression and malnutrition). Viruses are rarely the cause of surgical site infections. Transmission can occur by HBV, HCV or HIV positive surgical staff or in organ transplantations and postoperative reactivation of persistent infections is possible (especially for HBV, HCV, CMV, EBV and HIV). The principles for prevention of surgical site infections are dealt with as consequences of preoperative colonization by MRSA, methicillin-sensitive S. aureus (MSSA) and MRGN and reviewed with respect to screening, perioperative antibiotic prophylaxis and decolonization. In nosocomial peritonitis, the selection of antibiotics should consider previous antibiotic treatment. A single intra-abdominal detection of Candida spp. usually does not require antimycotic treatment in postoperatively stable and immunocompetent patients but is recommended in severe community-acquired or nosocomial peritonitis. Viral infections can be avoided by screening of organ donors and serological surveillance of surgery personnel.
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Affiliation(s)
- A Kramer
- Institut für Hygiene und Umweltmedizin, Universitätsmedizin Greifswald, Walther-Rathenau-Str. 49a, 17495, Greifswald, Deutschland.
| | - J Pochhammer
- Klinik für Allgemein-, Viszeral- und Thoraxchirurgie, Marienhospital Stuttgart, Vinzenz von Paul Kliniken, Stuttgart, Deutschland
| | - P Walger
- Internistische Intensivmedizin und Infektiologie, Johanniterkrankenhaus, Johanniterkliniken Bonn, Bonn, Deutschland
| | - U Seifert
- Friedrich-Loeffler-Institut für Medizinische Mikrobiologie, Universitätsmedizin Greifswald, Greifswald, Deutschland
| | - M Ruhnke
- Paracelsus-Klinik Osnabrück, Osnabrück, Deutschland
| | - J C Harnoss
- Klinik für Allgemein-, Viszeral- und Transplantationschirurgie, Universitätsklinikum Heidelberg, Heidelberg, Deutschland
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Abstract
Waterborne diseases continue to take a heavy toll on the global community, with developing nations, and particularly young children carrying most of the burden of morbidity and mortality. Starting with the historical context, this article explores some of the reasons why this burden continues today, despite our advances in public health over the past century or so. While molecular biology has revolutionized our abilities to define the ecosystems and etiologies of waterborne pathogens, control remains elusive. Lack of basic hygiene and sanitation, and failing infrastructure, remain two of the greatest challenges in the global fight against waterborne disease. Emerging risks continue to be the specter of multiple drug resistance and the ease with which determinants of virulence appear to be transmitted between strains of pathogens, both within and outside the human host.
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Affiliation(s)
- Timothy E Ford
- School of Health Professions, Shenandoah University, Winchester, VA, 22601, USA.
| | - Steve Hamner
- Department of Microbiology and Immunology, Montana State University, Bozeman, MT, 59717, USA
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Almagor J, Temkin E, Benenson I, Fallach N, Carmeli Y. The impact of antibiotic use on transmission of resistant bacteria in hospitals: Insights from an agent-based model. PLoS One 2018; 13:e0197111. [PMID: 29758063 PMCID: PMC5951570 DOI: 10.1371/journal.pone.0197111] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Accepted: 04/26/2018] [Indexed: 12/15/2022] Open
Abstract
Extensive antibiotic use over the years has led to the emergence and spread of antibiotic resistant bacteria (ARB). Antibiotic resistance poses a major threat to public health since for many infections antibiotic treatment is no longer effective. Hospitals are focal points for ARB spread. Antibiotic use in hospitals exerts selective pressure, accelerating the spread of ARB. We used an agent-based model to explore the impact of antibiotics on the transmission dynamics and to examine the potential of stewardship interventions in limiting ARB spread in a hospital. Agents in the model consist of patients and health care workers (HCW). The transmission of ARB occurs through contacts between patients and HCW and between adjacent patients. In the model, antibiotic use affects the risk of transmission by increasing the vulnerability of susceptible patients and the contagiousness of colonized patients who are treated with antibiotics. The model shows that increasing the proportion of patients receiving antibiotics increases the rate of acquisition non-linearly. The effect of antibiotics on the spread of resistance depends on characteristics of the antibiotic agent and the density of antibiotic use. Antibiotic's impact on the spread increases when the bacterial strain is more transmissible, and decreases as resistance prevalence rises. The individual risk for acquiring ARB increases in parallel with antibiotic density both for patients treated and not treated with antibiotics. Antibiotic treatment in the hospital setting plays an important role in determining the spread of resistance. Interventions to limit antibiotic use have the potential to reduce the spread of resistance, mainly by choosing an agent with a favorable profile in terms of its impact on patient's vulnerability and contagiousness. Methods to measure these impacts of antibiotics should be developed, standardized, and incorporated into drug development programs and approval packages.
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Affiliation(s)
- Jonatan Almagor
- Laboratory of Geosimulation and Spatial Analysis, Department of Geography and Human Environment, Tel Aviv University, Tel Aviv, Israel
- Department of Epidemiology and Preventive Medicine, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
- * E-mail:
| | - Elizabeth Temkin
- Department of Epidemiology and Preventive Medicine, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - Itzhak Benenson
- Laboratory of Geosimulation and Spatial Analysis, Department of Geography and Human Environment, Tel Aviv University, Tel Aviv, Israel
| | - Noga Fallach
- Department of Epidemiology and Preventive Medicine, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - Yehuda Carmeli
- Department of Epidemiology and Preventive Medicine, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
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Ethington T, Newsome S, Waugh J, Lee LD. Cleaning the air with ultraviolet germicidal irradiation lessened contact infections in a long-term acute care hospital. Am J Infect Control 2018; 46:482-486. [PMID: 29290480 DOI: 10.1016/j.ajic.2017.11.008] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Revised: 11/07/2017] [Accepted: 11/08/2017] [Indexed: 02/06/2023]
Abstract
BACKGROUND This study was designed to determine whether removing bacteria from the air with ultraviolet germicidal irradiation (UV-C) at the room level would reduce infection rates. METHODS We reviewed infection data for 12 months before and after UV-C installation in the special care unit (SCU) of a long-term acute care hospital. All patients admitted to the SCU during the study time frame were included. Microbiologic impactor air sampling was completed in August 2015. Shielded UV-C units were installed in 16 patient rooms, the hallway, and the biohazard room. Air sampling was repeated 81 days later. RESULTS After UV-C installation, airborne bacteria (colony forming units [CFU] per cubic meter of air) in patient rooms were reduced an average of 42% (175 vs 102 CFU/m3). Common health care-associated infections (HAIs) (Clostridium difficile [8 cases annually vs 1 case, P = .01] and catheter-associated urinary tract infection [20 cases annually vs 9 cases, P = .012]) were reduced significantly as were overall infections, in number of cases (average 8.8 per month vs 3.5, P < .001), and infection rate (average monthly rate 20.3 vs 8.6, P = .001), despite no reported changes to the amount or type of cleaning done, infection control protocols, or reporting procedures. Other infections, traditionally considered contact transmissible (central line-associated bloodstream infection and methicillin-resistant Staphylococcus aureus), also declined noticeably. CONCLUSIONS Continuous shielded UV-C reduced airborne bacteria and may also lower the number of HAIs, including those caused by contact pathogens. Reduced infections result in lessened morbidity and lower costs. Health care facilities might wish to consider continuous shielded UV-C at the room level as a possible addition to their infection prevention and control protocols.
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Lin TL, Kuo SC, Yeh CH, Chan YC, Lin YH, Li WF, Yong CC, Liu YW, Wang SH, Lin CC, Wang CC, Chen CL. Donor-Transmitted Bacterial Infection in Deceased Donor Liver Transplantation: Experience of Southern Taiwan Medical Center. Transplant Proc 2018; 50:2711-2714. [PMID: 30401382 DOI: 10.1016/j.transproceed.2018.04.017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Revised: 03/23/2018] [Accepted: 04/06/2018] [Indexed: 12/15/2022]
Abstract
BACKGROUND Bacterial Infection is the most important source of mortality and morbidity in liver transplantation recipients. Donor transmitted bacterial infection is rare but one of the most important infection sources. This kind of infection is difficult to identify, causing treatment dilemma. PATIENTS AND METHODS In this article, we retrospectively reviewed our deceased donor liver transplants performed from January 2014 to December 2016. Forty-two recipients in Kaohsiung Chang Gung Memorial Hospital receiving liver grafts from 35 deceased liver donors were evaluated. The demography, donor transmitted infection, and outcomes were evaluated. RESULT Two patients had probable donor transmitted bacterial infection and 1 patient died of suspected transmitted infection. CONCLUSION Early identification of donor infection and adequate antibiotic treatment for the donor and recipient are the keys to preventing donor transmitted bacterial infection. Donor infection is not an absolute contraindication for organ donation in the area of organ shortage. Organ procurement organizations or similar authorities may establish the platform for sharing the data about donor and recipient infections.
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Affiliation(s)
- T-L Lin
- Liver Transplant Center, Departments of Surgery, Kaohsiung Chang Gung Memorial Hospital, and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - S-C Kuo
- Liver Transplant Center, Departments of Surgery, Kaohsiung Chang Gung Memorial Hospital, and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - C-H Yeh
- Liver Transplant Center, Departments of Surgery, Kaohsiung Chang Gung Memorial Hospital, and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Y-C Chan
- Liver Transplant Center, Departments of Surgery, Kaohsiung Chang Gung Memorial Hospital, and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Y-H Lin
- Liver Transplant Center, Departments of Surgery, Kaohsiung Chang Gung Memorial Hospital, and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - W-F Li
- Liver Transplant Center, Departments of Surgery, Kaohsiung Chang Gung Memorial Hospital, and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - C-C Yong
- Liver Transplant Center, Departments of Surgery, Kaohsiung Chang Gung Memorial Hospital, and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Y-W Liu
- Liver Transplant Center, Departments of Surgery, Kaohsiung Chang Gung Memorial Hospital, and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - S-H Wang
- Liver Transplant Center, Departments of Surgery, Kaohsiung Chang Gung Memorial Hospital, and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - C-C Lin
- Liver Transplant Center, Departments of Surgery, Kaohsiung Chang Gung Memorial Hospital, and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - C-C Wang
- Liver Transplant Center, Departments of Surgery, Kaohsiung Chang Gung Memorial Hospital, and Chang Gung University College of Medicine, Kaohsiung, Taiwan.
| | - C-L Chen
- Liver Transplant Center, Departments of Surgery, Kaohsiung Chang Gung Memorial Hospital, and Chang Gung University College of Medicine, Kaohsiung, Taiwan
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Eisen L. Pathogen transmission in relation to duration of attachment by Ixodes scapularis ticks. Ticks Tick Borne Dis 2018; 9:535-542. [PMID: 29398603 PMCID: PMC5857464 DOI: 10.1016/j.ttbdis.2018.01.002] [Citation(s) in RCA: 90] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2017] [Revised: 01/05/2018] [Accepted: 01/12/2018] [Indexed: 11/22/2022]
Abstract
The blacklegged tick, Ixodes scapularis, is the primary vector to humans in the eastern United States of the deer tick virus lineage of Powassan virus (Powassan virus disease); the protozoan parasite Babesia microti (babesiosis); and multiple bacterial disease agents including Anaplasma phagocytophilum (anaplasmosis), Borrelia burgdorferi and Borrelia mayonii (Lyme disease), Borrelia miyamotoi (relapsing fever-like illness, named Borrelia miyamotoi disease), and Ehrlichia muris eauclairensis (a minor causative agent of ehrlichiosis). With the notable exception of Powassan virus, which can be transmitted within minutes after attachment by an infected tick, there is no doubt that the risk of transmission of other I. scapularis-borne pathogens, including Lyme disease spirochetes, increases with the length of time (number of days) infected ticks are allowed to remain attached. This review summarizes data from experimental transmission studies to reinforce the important disease-prevention message that regular (at least daily) tick checks and prompt tick removal has strong potential to reduce the risk of transmission of I. scapularis-borne bacterial and parasitic pathogens from infected attached ticks. The most likely scenario for human exposure to an I. scapularis-borne pathogen is the bite by a single infected tick. However, recent reviews have failed to make a clear distinction between data based on transmission studies where experimental hosts were fed upon by a single versus multiple infected ticks. A summary of data from experimental studies on transmission of Lyme disease spirochetes (Bo. burgdorferi and Bo. mayonii) by I. scapularis nymphs indicates that the probability of transmission resulting in host infection, at time points from 24 to 72 h after nymphal attachment, is higher when multiple infected ticks feed together as compared to feeding by a single infected tick. In the specific context of risk for human infection, the most relevant experimental studies therefore are those where the probability of pathogen transmission at a given point in time after attachment was determined using a single infected tick. The minimum duration of attachment by single infected I. scapularis nymphs required for transmission to result in host infection is poorly defined for most pathogens, but experimental studies have shown that Powassan virus can be transmitted within 15 min of tick attachment and both A. phagocytophilum and Bo. miyamotoi within the first 24 h of attachment. There is no experimental evidence for transmission of Lyme disease spirochetes by single infected I. scapularis nymphs to result in host infection when ticks are attached for only 24 h (despite exposure of nearly 90 experimental rodent hosts across multiple studies) but the probability of transmission resulting in host infection appears to increase to approximately 10% by 48 h and reach 70% by 72 h for Bo. burgdorferi. Caveats to the results from experimental transmission studies, including specific circumstances (such as re-attachment of previously partially fed infected ticks) that may lead to more rapid transmission are discussed.
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Affiliation(s)
- Lars Eisen
- Division of Vector-Borne Diseases, National Center for Emerging and Zoonotic Infectious Diseases, Centers for Disease Control and Prevention, 3156, Rampart Road, Fort Collins, CO 80521, United States.
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Abstract
Within the last five years, the State of Texas has experienced either transmission or outbreaks of Ebola, chikungunya, West Nile, and Zika virus infections. Autochthonous transmission of neglected parasitic and bacterial diseases has also become increasingly reported. The rise of such emerging and neglected tropical diseases (NTDs) has not occurred by accident but instead reflects rapidly evolving changes and shifts in a “new” Texas beset by modern and globalizing forces that include rapid expansions in population together with urbanization and human migrations, altered transportation patterns, climate change, steeply declining vaccination rates, and a new paradigm of poverty known as “blue marble health.” Summarized here are the major NTDs now affecting Texas. In addition to the vector-borne viral diseases highlighted above, there also is a high level of parasitic infections, including Chagas disease, trichomoniasis, and possibly leishmaniasis and toxocariasis, as well as typhus-group rickettsiosis, a vector-borne bacterial infection. I also highlight some of the key shifts in emerging and neglected disease patterns, partly due to an altered and evolving economic and ecological landscape in the new Texas, and provide some preliminary disease burden estimates for the major prevalent and incident NTDs.
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Affiliation(s)
- Peter J. Hotez
- Texas Children’s Hospital Center for Vaccine Development, Departments of Pediatrics and Molecular Virology and Microbiology, National School of Tropical Medicine, Baylor College of Medicine, Houston, Texas, United States of America
- Department of Biology, Baylor University, Waco, Texas, United States of America
- James A Baker III Institute for Public Policy, Rice University, Houston, Texas, United States of America
- Scowcroft Institute of International Affairs, Bush School of Government and Public Service, Texas A&M University, College Station, Texas, United States of America
- * E-mail:
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Chitadze N, Gureshidze N, Rostiaschvili N, Danelia N, Dalakishvili K, Durglishvili L, Kuchukhidze R, Imnadze P, Chlikadze R, Betashvili M, Kuchuloria T, Akhvlediani N, Rivard R, Nikolich M, Bautista CT, Washington MA, Akhvlediani T. Arthropod Borne and Zoonotic Infections Among Military Personnel in Georgia. J Spec Oper Med 2018; 18:136-140. [PMID: 29889971 DOI: 10.55460/mf2r-rmlc] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 06/01/2018] [Indexed: 06/08/2023]
Abstract
Military personnel are at an increased risk for exposure to arthropod- borne and zoonotic pathogens. The prevalence of these pathogens has not been adequately described in the country of Georgia. As the Georgian military moves toward an increased level of capability and the adoption of European Union and North Atlantic Treaty Organization standards, international field exercises will become more frequent and will likely involve an increasing number of international partners. This study was undertaken with the goal of defining the arthropod-borne and zoonotic pathogen threat in Georgia so force health protection planning can proceed in a rational and data-driven manner. To estimate disease burden, blood was taken from 1,000 Georgian military recruits between October 2014 and February 2016 and screened for previous exposure to a set of bacterial and viral pathogens using a antibody-based, serologic procedure. The highest rate of exposure was to Salmonella enterica serovar Typhi, and the lowest rate of exposure was to Coxiella burnettii (the causative agent of Q fever). These data provide insight into the prevalence of arthropod-borne infections in Georgia, fill a critical knowledge gap, will help guide future surveillance efforts, and will inform force health protection planning.
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Alonso-Aguilar NM, Juarez-Enriquez SR, Castro-Escarpulli G, Rivera G, Bocanegra-Garcia V, Guo X, Luna-Herrera J, Aguilera-Arreola MG. Aetiology and Significance of Hospital-Acquired Infections in Mexico. Clin Lab 2017; 63:207-218. [PMID: 28182358 DOI: 10.7754/clin.lab.2016.151119] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Hospital-acquired infections (HAIs) are infections that develop in the hospital environment and can be acquired by a patient or hospital staff. They are complications that combine diverse risk factors that make an individual susceptible and are frequently caused by endogenous and exogenous bacterial agents. The most commonly studied etiological agents are bacteria and fungi, with the former representing the most common etiological agents reported to the Hospital Epidemiological Surveillance Network (RHOVE) between 2007 and 2012. Among these agents were Acinetobacter baumannii, Pseudomonas aeruginosa, Escherichia coli, Klebsiella pneumoniae, Staphylococcus aureus, coagulase-negative Staphylococci (CNS), Enterococcus spp., and Streptococcus pneumoniae. Although obligate anaerobic bacteria are also etiological agents of HAIs, clinical laboratories do not usually perform bacteriological tests to isolate and identify these bacteria. As a result, patients are at a greater risk of not surviving an infection and the epidemiology of this bacterial group is unknown. An important problem associated with HAIs is bacterial multiple drug resistance, which not only increases morbidity and mortality but also the cost of inpatient care. The aim of this review is to provide current information to healthcare professionals on the status of HAIs in Mexico with an emphasis on the etiology, diagnosis, and antimicrobial resistance.
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Pollett S, Althouse BM, Forshey B, Rutherford GW, Jarman RG. Internet-based biosurveillance methods for vector-borne diseases: Are they novel public health tools or just novelties? PLoS Negl Trop Dis 2017; 11:e0005871. [PMID: 29190281 PMCID: PMC5708615 DOI: 10.1371/journal.pntd.0005871] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Internet-based surveillance methods for vector-borne diseases (VBDs) using "big data" sources such as Google, Twitter, and internet newswire scraping have recently been developed, yet reviews on such "digital disease detection" methods have focused on respiratory pathogens, particularly in high-income regions. Here, we present a narrative review of the literature that has examined the performance of internet-based biosurveillance for diseases caused by vector-borne viruses, parasites, and other pathogens, including Zika, dengue, other arthropod-borne viruses, malaria, leishmaniasis, and Lyme disease across a range of settings, including low- and middle-income countries. The fundamental features, advantages, and drawbacks of each internet big data source are presented for those with varying familiarity of "digital epidemiology." We conclude with some of the challenges and future directions in using internet-based biosurveillance for the surveillance and control of VBD.
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Affiliation(s)
- Simon Pollett
- Viral Diseases Branch, Walter Reed Army Institute of Research, Silver Spring, Maryland, United States of America
- Global Health Sciences, University of California, San Francisco, San Francisco, California, United States of America
- Marie Bashir Institute, University of Sydney, NSW, Australia
- * E-mail:
| | - Benjamin M. Althouse
- Institute for Disease Modeling, Bellevue, Washington, United States of America
- Information School, University of Washington, Seattle, Washington, United States of America
- Department of Biology, New Mexico State University, Las Cruces, New Mexico, United States of America
| | - Brett Forshey
- Global Emerging Infections Surveillance Section, Armed Force Health Surveillance Branch, Silver Spring, Maryland, United States of America
- Cherokee Nation Technology Solutions, Silver Spring, Maryland, United States of America
| | - George W. Rutherford
- Global Health Sciences, University of California, San Francisco, San Francisco, California, United States of America
| | - Richard G. Jarman
- Viral Diseases Branch, Walter Reed Army Institute of Research, Silver Spring, Maryland, United States of America
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MacIntyre CR, Chughtai AA, Rahman B, Peng Y, Zhang Y, Seale H, Wang X, Wang Q. The efficacy of medical masks and respirators against respiratory infection in healthcare workers. Influenza Other Respir Viruses 2017; 11:511-517. [PMID: 28799710 PMCID: PMC5705692 DOI: 10.1111/irv.12474] [Citation(s) in RCA: 74] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/22/2017] [Indexed: 01/03/2023] Open
Abstract
OBJECTIVE We aimed to examine the efficacy of medical masks and respirators in protecting against respiratory infections using pooled data from two homogenous randomised control clinical trials (RCTs). METHODS The data collected on 3591 subjects in two similar RCTs conducted in Beijing, China, which examined the same infection outcomes, were pooled. Four interventions were compared: (i) continuous N95 respirator use, (ii) targeted N95 respirator use, (iii) medical mask use and (iv) control arm. The outcomes were laboratory-confirmed viral respiratory infection, influenza A or B, laboratory-confirmed bacterial colonisation and pathogens grouped by mode of transmission. RESULTS Rates of all outcomes were consistently lower in the continuous N95 and/or targeted N95 arms. In adjusted analysis, rates of laboratory-confirmed bacterial colonisation (RR 0.33, 95% CI 0.21-0.51), laboratory-confirmed viral infections (RR 0.46, 95% CI 0.23-0.91) and droplet-transmitted infections (RR 0.26, 95% CI 0.16-0.42) were significantly lower in the continuous N95 arm. Laboratory-confirmed influenza was also lowest in the continuous N95 arm (RR 0.34, 95% CI 0.10-1.11), but the difference was not statistically significant. Rates of laboratory-confirmed bacterial colonisation (RR 0.54, 95% CI 0.33-0.87) and droplet-transmitted infections (RR 0.43, 95% CI 0.25-0.72) were also lower in the targeted N95 arm, but not in medical mask arm. CONCLUSION The results suggest that the classification of infections into droplet versus airborne transmission is an oversimplification. Most guidelines recommend masks for infections spread by droplets. N95 respirators, as "airborne precautions," provide superior protection for droplet-transmitted infections. To ensure the occupational health and safety of healthcare worker, the superiority of respirators in preventing respiratory infections should be reflected in infection control guidelines.
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Affiliation(s)
- Chandini Raina MacIntyre
- School of Public Health and Community MedicineUniversity of New South WalesSydneyNSWAustralia
- College of Public Service & Community Solutionsand College of Health SolutionsArizona State UniversityPhoenixAZUSA
| | - Abrar Ahmad Chughtai
- School of Public Health and Community MedicineUniversity of New South WalesSydneyNSWAustralia
| | - Bayzidur Rahman
- School of Public Health and Community MedicineUniversity of New South WalesSydneyNSWAustralia
| | - Yang Peng
- The Beijing Centre for Disease Prevention and ControlBeijingChina
| | - Yi Zhang
- The Beijing Centre for Disease Prevention and ControlBeijingChina
| | - Holly Seale
- School of Public Health and Community MedicineUniversity of New South WalesSydneyNSWAustralia
| | - Xiaoli Wang
- The Beijing Centre for Disease Prevention and ControlBeijingChina
| | - Quanyi Wang
- The Beijing Centre for Disease Prevention and ControlBeijingChina
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Quainoo S, Coolen JPM, van Hijum SAFT, Huynen MA, Melchers WJG, van Schaik W, Wertheim HFL. Whole-Genome Sequencing of Bacterial Pathogens: the Future of Nosocomial Outbreak Analysis. Clin Microbiol Rev 2017; 30:1015-1063. [PMID: 28855266 PMCID: PMC5608882 DOI: 10.1128/cmr.00016-17] [Citation(s) in RCA: 225] [Impact Index Per Article: 32.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Outbreaks of multidrug-resistant bacteria present a frequent threat to vulnerable patient populations in hospitals around the world. Intensive care unit (ICU) patients are particularly susceptible to nosocomial infections due to indwelling devices such as intravascular catheters, drains, and intratracheal tubes for mechanical ventilation. The increased vulnerability of infected ICU patients demonstrates the importance of effective outbreak management protocols to be in place. Understanding the transmission of pathogens via genotyping methods is an important tool for outbreak management. Recently, whole-genome sequencing (WGS) of pathogens has become more accessible and affordable as a tool for genotyping. Analysis of the entire pathogen genome via WGS could provide unprecedented resolution in discriminating even highly related lineages of bacteria and revolutionize outbreak analysis in hospitals. Nevertheless, clinicians have long been hesitant to implement WGS in outbreak analyses due to the expensive and cumbersome nature of early sequencing platforms. Recent improvements in sequencing technologies and analysis tools have rapidly increased the output and analysis speed as well as reduced the overall costs of WGS. In this review, we assess the feasibility of WGS technologies and bioinformatics analysis tools for nosocomial outbreak analyses and provide a comparison to conventional outbreak analysis workflows. Moreover, we review advantages and limitations of sequencing technologies and analysis tools and present a real-world example of the implementation of WGS for antimicrobial resistance analysis. We aimed to provide health care professionals with a guide to WGS outbreak analysis that highlights its benefits for hospitals and assists in the transition from conventional to WGS-based outbreak analysis.
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Affiliation(s)
- Scott Quainoo
- Department of Microbiology, Radboud University, Nijmegen, The Netherlands
| | - Jordy P M Coolen
- Department of Medical Microbiology, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Sacha A F T van Hijum
- Centre for Molecular and Biomolecular Informatics, Radboud University Medical Centre, Nijmegen, The Netherlands
- NIZO, Ede, The Netherlands
| | - Martijn A Huynen
- Centre for Molecular and Biomolecular Informatics, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Willem J G Melchers
- Department of Medical Microbiology, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Willem van Schaik
- Institute of Microbiology and Infection, University of Birmingham, Birmingham, United Kingdom
| | - Heiman F L Wertheim
- Department of Medical Microbiology, Radboud University Medical Centre, Nijmegen, The Netherlands
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Michael Dunne W, Pouseele H, Monecke S, Ehricht R, van Belkum A. Epidemiology of transmissible diseases: Array hybridization and next generation sequencing as universal nucleic acid-mediated typing tools. Infect Genet Evol 2017; 63:332-345. [PMID: 28943408 DOI: 10.1016/j.meegid.2017.09.019] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2017] [Revised: 09/14/2017] [Accepted: 09/15/2017] [Indexed: 02/05/2023]
Abstract
The magnitude of interest in the epidemiology of transmissible human diseases is reflected in the vast number of tools and methods developed recently with the expressed purpose to characterize and track evolutionary changes that occur in agents of these diseases over time. Within the past decade a new suite of such tools has become available with the emergence of the so-called "omics" technologies. Among these, two are exponents of the ongoing genomic revolution. Firstly, high-density nucleic acid probe arrays have been proposed and developed using various chemical and physical approaches. Via hybridization-mediated detection of entire genes or genetic polymorphisms in such genes and intergenic regions these so called "DNA chips" have been successfully applied for distinguishing very closely related microbial species and strains. Second and even more phenomenal, next generation sequencing (NGS) has facilitated the assessment of the complete nucleotide sequence of entire microbial genomes. This technology currently provides the most detailed level of bacterial genotyping and hence allows for the resolution of microbial spread and short-term evolution in minute detail. We will here review the very recent history of these two technologies, sketch their usefulness in the elucidation of the spread and epidemiology of mostly hospital-acquired infections and discuss future developments.
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Affiliation(s)
- W Michael Dunne
- Data Analytics Unit, bioMerieux, 100 Rodolphe Street, Durham, NC 27712, USA.
| | - Hannes Pouseele
- Data Analytics Unit, bioMerieux, 100 Rodolphe Street, Durham, NC 27712, USA; Applied Maths NV, Keistraat 120, 9830 Sint-Martens-Latem, Belgium.
| | - Stefan Monecke
- Alere Technologies GmbH, Jena, Germany; InfectoGnostics Research Campus, Jena, Germany; Institute for Medical Microbiology and Hygiene, Technische Universität Dresden, Dresden, Germany
| | - Ralf Ehricht
- Alere Technologies GmbH, Jena, Germany; InfectoGnostics Research Campus, Jena, Germany.
| | - Alex van Belkum
- Data Analytics Unit, bioMérieux, 3, Route de Port Michaud, 38390 La Balme Les Grottes, France.
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Deverell M, Phu A, Zurynski Y, Elliott E. Australian Paediatric Surveillance Unit Annual Report, 2016. Commun Dis Intell (2018) 2017; 41:E288-E293. [PMID: 29720077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
This report summarises the cases reported to the Australian Paediatric Surveillance Unit (APSU) of rare infectious diseases or rare complications of more common infectious diseases in children. During the calendar year 2016, there were approximately 1500 paediatricians reporting to the APSU and the monthly report card return rate was 90%. APSU continued to provide unique national data on the perinatal exposure to HIV, congenital rubella, congenital cytomegalovirus, neonatal and infant herpes simplex virus, and congenital and neonatal varicella. APSU contributed 10 unique cases of Acute Flaccid Paralysis (a surrogate for polio) - these data are combined with cases ascertained through other surveillance systems including the Paediatric Active Disease Surveillance (PAEDS) to meet the World Health Organisation surveillance target. There was a decline in the number of cases of juvenile onset Recurrent Respiratory Papillomatosis which is likely to be associated with the introduction of the National HPV Vaccination Program. The number of cases of severe complications of influenza was significantly less in 2016 (N=32) than in 2015 (N=84) and for the first time in the last nine years no deaths due to severe influenza were reported to the APSU. In June 2016 surveillance for microcephaly commenced to assist with the detection of potential cases of congenital Zika virus infection and during that time there were 21 confirmed cases - none had a relevant history to suspect congenital Zika virus infection, however, these cases are being followed up to determine the cause of microcephaly.
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Affiliation(s)
- Marie Deverell
- Australian Paediatric Surveillance Unit, Kids Research Institute, Westmead, New South Wales
- Sydney Medical School, Discipline of Child and Adolescent Health, The University of Sydney, Sydney, New South Wales
| | - Amy Phu
- Australian Paediatric Surveillance Unit, Kids Research Institute, Westmead, New South Wales
- Sydney Medical School, Discipline of Child and Adolescent Health, The University of Sydney, Sydney, New South Wales
| | - Yvonne Zurynski
- Australian Paediatric Surveillance Unit, Kids Research Institute, Westmead, New South Wales
- Sydney Medical School, Discipline of Child and Adolescent Health, The University of Sydney, Sydney, New South Wales
| | - Elizabeth Elliott
- Australian Paediatric Surveillance Unit, Kids Research Institute, Westmead, New South Wales
- Sydney Medical School, Discipline of Child and Adolescent Health, The University of Sydney, Sydney, New South Wales
- Sydney Children's Hospitals Network (Westmead), Westmead, New South Wales
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Schelling E, Greter H, Kessely H, Abakar MF, Ngandolo BN, Crump L, Bold B, Kasymbekov J, Baljinnyam Z, Fokou G, Zinsstag J, Bonfoh B, Hattendorf J, Béchir M. Human and animal health surveys among pastoralists. REV SCI TECH OIE 2017; 35:659-671. [PMID: 27917962 DOI: 10.20506/rst.35.2.2547] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Valid human and livestock health surveys, including longitudinal follow-up, are feasible among mobile pastoralists and provide fundamental information to agencies for interventions that are responsive to realities and effective in addressing the needs of pastoralists. However, pastoralists are often excluded from studies, surveillance systems and health programmes. The occurrence of preventable and treatable diseases such as perinatal tetanus, measles and tuberculosis are indicative of limited access to health providers and information. It is difficult for health services to include effective outreach with their available financial and human resources. One consequence is that maternal mortality rates among pastoralists are unacceptably high. Environmental determinants such as the quality of water and the pasture ecosystems further influence the morbidity of pastoralists. In the Sahel, the nutritional status of pastoralist children is seasonally better than that of settled children; but pastoralist women tend to have higher acute malnutrition rates. Pastoralist women are more vulnerable than men to exclusion from health services for different context-specific reasons. Evidence-based control measures can be assessed in cluster surveys with simultaneous assessments of health among people and livestock, where data on costs of disease and interventions are also collected. These provide important arguments for governmental and non-governmental agencies for intervention development. New, integrated One Health surveillance systems making use of mobile technology and taking into account local concepts and the experiences and priorities of pastoralist communities, combined with sound field data, are essential to develop and provide adapted human and animal health services that are inclusive for mobile pastoralist communities and allow them to maintain their mobile way of life.
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Ye QF, Zhou W, Wan QQ. Donor-derived infections among Chinese donation after cardiac death liver recipients. World J Gastroenterol 2017; 23:5809-5816. [PMID: 28883707 PMCID: PMC5569296 DOI: 10.3748/wjg.v23.i31.5809] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Revised: 06/27/2017] [Accepted: 07/24/2017] [Indexed: 02/06/2023] Open
Abstract
AIM To investigate blood cultures of deceased donors and report the confirmed transmission of bacterial infection from donors to liver recipients.
METHODS We retrospectively studied the results of blood cultures among our donation after cardiac death (DCD) donors and calculated the donor-derived bacterial infection rates among liver recipients. Study participants underwent liver transplantation between January 1, 2010 and February 1, 2017. The study involved a total of 67 recipients of liver grafts from 67 DCD donors. We extracted the data of donors’ and patients’ characteristics, culture results and clinical outcomes, especially the post-transplant complications in liver recipients, from electronic medical records. We analyzed the characteristics of the donors and the corresponding liver recipients with emphasis put on donor-derived infections.
RESULTS Head trauma was the most common origin of death among our 67 DCD donors (46.3%). Blood taken prior to the procurement operation was cultured for 53 of the donors, with 17 episodes of bloodstream infections developing from 13 donors. The predominant organism isolated from the blood of donors was Gram-positive bacteria (70.6%). Only three (4.5%) of 67 liver recipients developed confirmed donor-derived bacterial infections, with two isolates of multidrug-resistant Klebsiella pneumoniae and one isolate of multidrug-resistant Enterobacter aerogenes. The liver recipients with donor-derived infections showed relation to higher crude mortality and graft loss rates (33.3% each) within 3 mo post transplantation, as compared to those without donor-derived infections (9.4% and 4.7%, respectively). All three liver recipients received appropriate antimicrobial therapy.
CONCLUSION Liver recipients have high occurrence of donor-derived infections. The liver recipients with donor-derived multidrug-resistant Enterobacteriaceae infections can have good outcome if appropriate antimicrobial therapy is given.
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Affiliation(s)
- Qi-Fa Ye
- Department of Transplant Surgery, the Third Xiangya Hospital of Central South University, Changsha 410013, Hunan Province, China
- Department of Transplant Surgery, Zhongnan Hospital of Wuhan University, Wuhan 430071, Hubei Province, China
| | - Wei Zhou
- Department of Transplant Surgery, the Third Xiangya Hospital of Central South University, Changsha 410013, Hunan Province, China
| | - Qi-Quan Wan
- Department of Transplant Surgery, the Third Xiangya Hospital of Central South University, Changsha 410013, Hunan Province, China
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Leangapichart T, Rolain JM, Memish ZA, Al-Tawfiq JA, Gautret P. Emergence of drug resistant bacteria at the Hajj: A systematic review. Travel Med Infect Dis 2017; 18:3-17. [PMID: 28652197 DOI: 10.1016/j.tmaid.2017.06.008] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Revised: 06/15/2017] [Accepted: 06/22/2017] [Indexed: 02/07/2023]
Abstract
BACKGROUND Hajj is the annual mass gathering of Muslims, and is a reservoir and potential source of bacterial transmission. The emergence of bacterial transmission, including multi-drug resistance (MDR) bacteria, during Hajj has not been systematically assessed. METHODS Articles in Pubmed, Scopus, and Google scholar were identified using controlled words relating to antibiotic resistance (AR) at the Hajj from January 2002 to January 2017. Eligible studies were identified by two researchers. AR patterns of bacteria were obtained for each study. RESULTS We included 31 publications involving pilgrims, Hajj workers or local patients attending hospitals in Mecca, Mina, and the Medina area. Most of these publications provided antibiotic susceptibility results. Ten of them used the PCR approach to identify AR genes. MRSA carriage was reported in pilgrims and food handlers at a rate of 20%. Low rates of vancomycin-resistant gram-positive bacteria were reported in pilgrims and patients. The prevalence of third-generation cephalosporin-resistant bacteria was common in the Hajj region. Across all studies, carbapenem-resistant bacteria were detected in fewer than 10% of E.coli isolates tested but up to 100% in K. pneumoniae and A. baumannii. Colistin-resistant Salmonella enterica, including mcr-1 colistin-resistant E.coli and K.pneumoniae were only detected in the pilgrim cohorts. CONCLUSION This study provides an overview of the prevalence of MDR bacteria at the Hajj. Pilgrims are at high risk of AR bacterial transmission and may carry and transfer these bacteria when returning to their home countries. Thus, pilgrims should be instructed by health care practitioners about hygiene practices aiming at reducing traveler's diarrhea and limited use of antibiotics during travel in order to reduce the risk of MDR bacterial transmission.
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Affiliation(s)
- Thongpan Leangapichart
- Unité de Recherche sur les Maladies Infectieuses et Tropicales Émergentes (URMITE) CNRS-IRD UMR 6236, Méditerranée Infection, Faculté de Médecine et de Pharmacie, Aix-Marseille-Université, Marseille, France
| | - Jean-Marc Rolain
- Unité de Recherche sur les Maladies Infectieuses et Tropicales Émergentes (URMITE) CNRS-IRD UMR 6236, Méditerranée Infection, Faculté de Médecine et de Pharmacie, Aix-Marseille-Université, Marseille, France
| | - Ziad A Memish
- Ministry of Health, Riyadh, Saudi Arabia; Alfaisal University, College of Medicine, Riyadh, Saudi Arabia; Hubert Department of Global Health, Rollins School of Public Health, Emory University, Atlanta, USA
| | - Jaffar A Al-Tawfiq
- Johns Hopkins Aramco Healthcare, Dhahran, Saudi Arabia; Indiana University School of Medicine, Indianapolis, IN, USA
| | - Philippe Gautret
- Unité de Recherche sur les Maladies Infectieuses et Tropicales Émergentes (URMITE) CNRS-IRD UMR 6236, Méditerranée Infection, Faculté de Médecine et de Pharmacie, Aix-Marseille-Université, Marseille, France.
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Rar V, Livanova N, Tkachev S, Kaverina G, Tikunov A, Sabitova Y, Igolkina Y, Panov V, Livanov S, Fomenko N, Babkin I, Tikunova N. Detection and genetic characterization of a wide range of infectious agents in Ixodes pavlovskyi ticks in Western Siberia, Russia. Parasit Vectors 2017; 10:258. [PMID: 28545549 PMCID: PMC5445278 DOI: 10.1186/s13071-017-2186-5] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2016] [Accepted: 05/11/2017] [Indexed: 12/02/2022] Open
Abstract
BACKGROUND The Ixodes pavlovskyi tick species, a member of the I. persulcatus/I. ricinus group, was discovered in the middle of the 20th century in the Russian Far East. Limited data have been reported on the detection of infectious agents in this tick species. The aim of this study was to investigate the prevalence and genetic variability of a wide range of infectious agents in I. pavlovskyi ticks collected in their traditional and recently invaded habitats, the Altai Mountains and Novosibirsk Province, respectively, which are both located within the Western Siberian part of the I. pavlovskyi distribution area. RESULTS This study reports the novel discovery of Borrelia bavariensis, Rickettsia helvetica, R. heilongjiangensis, R. raoultii, "Candidatus Rickettsia tarasevichiae", Anaplasma phagocytophilum, Ehrlichia muris, "Candidatus Neoehrlichia mikurensis" and Babesia microti in I. pavlovskyi ticks. In addition, we confirmed the previous identification of B. afzelii, B. garinii and B. miyamotoi, as well as tick-borne encephalitis and Kemerovo viruses in this tick species. The prevalence and some genetic characteristics of all of the tested agents were compared with those found in I. persulcatus ticks that were collected at the same time in the same locations, where these tick species occur in sympatry. It was shown that the prevalence and genotypes of many of the identified pathogens did not significantly differ between I. pavlovskyi and I. persulcatus ticks. However, I. pavlovskyi ticks were significantly more often infected by B. garinii and less often by B. bavariensis, B. afzelii, "Ca. R. tarasevichiae", and E. muris than I. persulcatus ticks in both studied regions. Moreover, new genetic variants of B. burgdorferi (sensu lato) and Rickettsia spp. as well as tick-borne encephalitis and Kemerovo viruses were found in both I. pavlovskyi and I. persulcatus ticks. CONCLUSION Almost all pathogens that were previously detected in I. persulcatus ticks were identified in I. pavlovskyi ticks; however, the distribution of species belonging to the B. burgdorferi (sensu lato) complex, the genus Rickettsia, and the family Anaplasmataceae was different between the two tick species. Several new genetic variants of viral and bacterial agents were identified in I. pavlovskyi and I. persulcatus ticks.
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Affiliation(s)
- Vera Rar
- Institute of Chemical Biology and Fundamental Medicine, SB RAS, Novosibirsk, Russian Federation
| | - Natalia Livanova
- Institute of Chemical Biology and Fundamental Medicine, SB RAS, Novosibirsk, Russian Federation
- Institute of Systematics and Ecology of Animals SB RAS, Novosibirsk, Russian Federation
| | - Sergey Tkachev
- Institute of Chemical Biology and Fundamental Medicine, SB RAS, Novosibirsk, Russian Federation
| | - Galina Kaverina
- Institute of Chemical Biology and Fundamental Medicine, SB RAS, Novosibirsk, Russian Federation
| | - Artem Tikunov
- Institute of Chemical Biology and Fundamental Medicine, SB RAS, Novosibirsk, Russian Federation
| | - Yuliya Sabitova
- Institute of Chemical Biology and Fundamental Medicine, SB RAS, Novosibirsk, Russian Federation
| | - Yana Igolkina
- Institute of Chemical Biology and Fundamental Medicine, SB RAS, Novosibirsk, Russian Federation
| | - Victor Panov
- Institute of Systematics and Ecology of Animals SB RAS, Novosibirsk, Russian Federation
| | - Stanislav Livanov
- Institute of Systematics and Ecology of Animals SB RAS, Novosibirsk, Russian Federation
| | - Nataliya Fomenko
- Institute of Chemical Biology and Fundamental Medicine, SB RAS, Novosibirsk, Russian Federation
| | - Igor Babkin
- Institute of Chemical Biology and Fundamental Medicine, SB RAS, Novosibirsk, Russian Federation
| | - Nina Tikunova
- Institute of Chemical Biology and Fundamental Medicine, SB RAS, Novosibirsk, Russian Federation
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Nitsch-Osuch A. [Travels and spreading of multi-resistant bacteria]. Pol Merkur Lekarski 2017; 42:219-222. [PMID: 28557971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
The increasing number of international travel for tourism, business and for medical reasons rises the risk of spreading of multi-resistant bacteria. It has been shown that an intercontinental travel, mainly to Asia (Indian Subcontinent), promotes a colonization of the digestive tract, mainly by multi-resistant Enterobacteriaceae (MRE) and increases the risk of symptomatic infections caused by these agents. The colonization of the digestive tract by MRE is reported in 29-88% of travelers. It sustains 3 to 12 months, respectively in 10% and 2% of travelers. Risk factors for the acquisition of colonization with MRE include: travel duration and destination, treatment with betalactam antibiotics during the travel, the use of local medical services, including hospitalization, presence of gastrointestinal symptoms during the travel (mainly diarrhea), age >65 years. The need of the hospitalization during the travel increases the risk of colonization, but is not a prerequisite factor for the acquisition of the colonization, as cases of the MRE carriage are reported in patients who had never used medical services outside the country. It indicates other possible transmission routes, including food. In order to reduce the risk of MRE spreading, it is recommended to ask patients about a history of travel and treatment within the last 12 months. All patient who report such events and require hospitalization in their home countries should be microbiologically screened. Hospitalized patients colonized with multiple resistant bacteria require an isolation or cohortation. Educational activities related to the hand hygiene compliance should be performed. The risk of the home transmission of MRE is not high, it lasts for a short period (up to 3 months). Routine microbiological testing for all persons returning from an international or intercontinental travel is not recommended, neither microbiological screening among their households.
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Affiliation(s)
- Aneta Nitsch-Osuch
- Department of Social Medicine and Public Health, Medical University of Warsaw, Poland
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Klinkenberg D, Backer JA, Didelot X, Colijn C, Wallinga J. Simultaneous inference of phylogenetic and transmission trees in infectious disease outbreaks. PLoS Comput Biol 2017; 13:e1005495. [PMID: 28545083 PMCID: PMC5436636 DOI: 10.1371/journal.pcbi.1005495] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Accepted: 04/03/2017] [Indexed: 01/22/2023] Open
Abstract
Whole-genome sequencing of pathogens from host samples becomes more and more routine during infectious disease outbreaks. These data provide information on possible transmission events which can be used for further epidemiologic analyses, such as identification of risk factors for infectivity and transmission. However, the relationship between transmission events and sequence data is obscured by uncertainty arising from four largely unobserved processes: transmission, case observation, within-host pathogen dynamics and mutation. To properly resolve transmission events, these processes need to be taken into account. Recent years have seen much progress in theory and method development, but existing applications make simplifying assumptions that often break up the dependency between the four processes, or are tailored to specific datasets with matching model assumptions and code. To obtain a method with wider applicability, we have developed a novel approach to reconstruct transmission trees with sequence data. Our approach combines elementary models for transmission, case observation, within-host pathogen dynamics, and mutation, under the assumption that the outbreak is over and all cases have been observed. We use Bayesian inference with MCMC for which we have designed novel proposal steps to efficiently traverse the posterior distribution, taking account of all unobserved processes at once. This allows for efficient sampling of transmission trees from the posterior distribution, and robust estimation of consensus transmission trees. We implemented the proposed method in a new R package phybreak. The method performs well in tests of both new and published simulated data. We apply the model to five datasets on densely sampled infectious disease outbreaks, covering a wide range of epidemiological settings. Using only sampling times and sequences as data, our analyses confirmed the original results or improved on them: the more realistic infection times place more confidence in the inferred transmission trees. It is becoming easier and cheaper to obtain (whole genome) sequences of pathogen samples during outbreaks of infectious diseases. If all hosts during an outbreak are sampled, and these samples are sequenced, the small differences between the sequences (single nucleotide polymorphisms, SNPs) give information on the transmission tree, i.e. who infected whom, and when. However, correctly inferring this tree is not straightforward, because SNPs arise from unobserved processes including infection events, as well as pathogen growth and mutation within the hosts. Several methods have been developed in recent years, but often for specific applications or with limiting assumptions, so that they are not easily applied to new settings and datasets. We have developed a new model and method to infer transmission trees without putting prior limiting constraints on the order of unobserved events. The method is easily accessible in an R package implementation. We show that the method performs well on new and previously published simulated data. We illustrate applicability to a wide range of infectious diseases and settings by analysing five published datasets on densely sampled infectious disease outbreaks, confirming or improving the original results.
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Affiliation(s)
- Don Klinkenberg
- Department of Epidemiology and Surveillance, National Institute for Public Health and the Environment, Bilthoven, The Netherlands
- * E-mail:
| | - Jantien A. Backer
- Department of Epidemiology and Surveillance, National Institute for Public Health and the Environment, Bilthoven, The Netherlands
| | - Xavier Didelot
- Department of Infectious Disease Epidemiology, Imperial College London, London, United Kingdom
| | - Caroline Colijn
- Department of Mathematics, Imperial College London, London, United Kingdom
| | - Jacco Wallinga
- Department of Epidemiology and Surveillance, National Institute for Public Health and the Environment, Bilthoven, The Netherlands
- Department of Medical Statistics and Bio-Informatics, Leiden University Medical Center, Leiden, The Netherlands
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48
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Decker BK, Lau AF, Dekker JP, Spalding CD, Sinaii N, Conlan S, Henderson DK, Segre JA, Frank KM, Palmore TN. Healthcare personnel intestinal colonization with multidrug-resistant organisms. Clin Microbiol Infect 2017; 24:82.e1-82.e4. [PMID: 28506784 DOI: 10.1016/j.cmi.2017.05.010] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2017] [Revised: 04/21/2017] [Accepted: 05/07/2017] [Indexed: 11/17/2022]
Abstract
OBJECTIVES This study aims to assess the association between patient contact and intestinal carriage of multidrug-resistant organisms (MDRO) by sampling healthcare personnel (HCP) and staff without patient contact. METHODS For this observational study, we recruited 400 HCP who worked in our 200-bed research hospital and 400 individuals without patient contact between November 2013 and February 2015. Participants submitted two self-collected perirectal swabs and a questionnaire. Swabs were processed for multidrug-resistant Gram-negative bacteria and vancomycin-resistant enterococci (VRE). Questionnaires explored occupational and personal risk factors for MDRO carriage. RESULTS Among 800 participants, 94.4% (755/800) submitted at least one swab, and 91.4% (731/800) also submitted questionnaires. Extended spectrum β-lactamase-producing organisms were recovered from 3.4% (26/755) of participants, and only one carbapenemase-producing organism was recovered. No VRE were detected. The potential exposure of 68.9% (250/363) of HCP who reported caring for MDRO-colonized patients did not result in a rate of MDRO carriage among HCP (4.0%; 15/379) significantly higher than that of staff without patient contact (3.2%; 12/376; p 0.55). CONCLUSIONS This is the largest US study of HCP intestinal MDRO carriage. The low colonization rate is probably reflective of local community background rates, suggesting that HCP intestinal colonization plays a minor role in nosocomial spread of MDROs in a non-outbreak setting. TRIAL REGISTRATION clinicaltrials.gov Identifier: NCT01952158.
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Affiliation(s)
- B K Decker
- NIH Clinical Center, National Institutes of Health, Bethesda, MD, USA
| | - A F Lau
- NIH Clinical Center, National Institutes of Health, Bethesda, MD, USA
| | - J P Dekker
- NIH Clinical Center, National Institutes of Health, Bethesda, MD, USA
| | - C D Spalding
- NIH Clinical Center, National Institutes of Health, Bethesda, MD, USA
| | - N Sinaii
- NIH Clinical Center, National Institutes of Health, Bethesda, MD, USA
| | - S Conlan
- National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - D K Henderson
- NIH Clinical Center, National Institutes of Health, Bethesda, MD, USA
| | - J A Segre
- National Human Genome Research Institute, National Institutes of Health, Bethesda, MD, USA
| | - K M Frank
- NIH Clinical Center, National Institutes of Health, Bethesda, MD, USA
| | - T N Palmore
- NIH Clinical Center, National Institutes of Health, Bethesda, MD, USA; National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD, USA.
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49
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Brandt N. Controlling the Use of Antibiotics: Are You Ready? Consult Pharm 2017; 32 Suppl A:1-2. [PMID: 28655369 DOI: 10.4140/tcp.n.2017.1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Affiliation(s)
- Nicole Brandt
- Peter Lamy Center on Drug Therapy and Aging at the University of Maryland School of Pharmacy, Baltimore, Maryland, USA
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50
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McDonald C, Allen J, Brailsford S, Roy A, Ball J, Moule R, Vasconcelos M, Morrison R, Pitt T. Bacterial screening of platelet components by National Health Service Blood and Transplant, an effective risk reduction measure. Transfusion 2017; 57:1122-1131. [PMID: 28425610 DOI: 10.1111/trf.14085] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Revised: 01/19/2017] [Accepted: 01/19/2017] [Indexed: 11/28/2022]
Abstract
BACKGROUND Bacterial contamination of blood components remains a major cause of sepsis in transfusion medicine. Between 2006 and 2010 in the 5 years before the introduction of bacterial screening of platelet (PLT) components by National Health Service Blood and Transplant (NHSBT), seven cases of PLT component-associated transmission of bacterial infection were recorded for 10 patients, three of which were fatal. STUDY DESIGN AND METHODS Sampling of individual PLT components was undertaken at 36 to 48 hours after donation and tested in the BacT/ALERT system with 8 mL inoculated into each of aerobic and anaerobic culture bottles. Bottles were incubated until the end of the 7-day shelf life and initial reactive bottles were examined for contamination. Bacterial screened time-expired PLTs were tested as in the screen method. RESULTS From February 2011 to September 2015, a total of 1,239,029 PLT components were screened. Initial-reactive, confirmed-positive, and false-positive rates were 0.37, 0.03, and 0.19%, respectively. False-negative cultures, all with Staphylococcus aureus, occurred on four occasions; three were visually detected before transfusion and one confirmed transmission resulted in patient morbidity. The NHSBT screening protocol effectively reduced the number of clinically adverse transfusion transmissions by 90% in this reporting period, compared to a similar time period before implementation. Delayed testing of 4515 time-expired PLT units after screening revealed no positives. CONCLUSION The implementation of bacterial screening of PLT components with the NHSBT BacT/ALERT protocol was an effective risk reduction measure and increased the safety of the blood supply.
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