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Guillaume Y, Debela M, Slater D, Vissieres K, Ternier R, Franke MF, Harris JB, Ivers LC. Poor Sensitivity of Stool Culture Compared to Polymerase Chain Reaction in Surveillance for Vibrio cholerae in Haiti, 2018-2019. Open Forum Infect Dis 2023; 10:ofad301. [PMID: 37383250 PMCID: PMC10296062 DOI: 10.1093/ofid/ofad301] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Accepted: 05/30/2023] [Indexed: 06/30/2023] Open
Abstract
We report on the sensitivity and specificity of stool culture compared to polymerase chain reaction for detecting Vibrio cholerae in Haiti during the waning period of the initial outbreak in 2018-2019. We found that stool culture (with a sensitivity of 33.3% and specificity of 97.4%) may not be sufficiently robust in this context.
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Affiliation(s)
- Yodeline Guillaume
- Correspondence: Yodeline Guillaume, MA, Center for Global Health, Massachusetts General Hospital, 125 Nashua St, Boston, MA 02148 (); Louise Ivers, MD, Center for Global Health, Massachusetts General Hospital, 125 Nashua St, Boston, MA 02148 ()
| | - Meti Debela
- University of Massachusetts Chan Medical School, Worcester, Massachusetts, USA
| | - Damien Slater
- Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Kenia Vissieres
- Department of Clinical Programs, Zanmi Lasante, Croix-des-Bouquets, Haiti
| | - Ralph Ternier
- Department of Clinical Programs, Zanmi Lasante, Croix-des-Bouquets, Haiti
| | - Molly F Franke
- Department of Clinical Programs, Zanmi Lasante, Croix-des-Bouquets, Haiti
| | - Jason B Harris
- Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Louise C Ivers
- Correspondence: Yodeline Guillaume, MA, Center for Global Health, Massachusetts General Hospital, 125 Nashua St, Boston, MA 02148 (); Louise Ivers, MD, Center for Global Health, Massachusetts General Hospital, 125 Nashua St, Boston, MA 02148 ()
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Weil A, Bhuiyan T, Debela M, Chowdhury F, Khan A, LaRocque R, Ryan E, Calderwood SB, Qadri F, Harris J. 622. Increased IgA Coating of Gut Microbes After Administration of Killed, Whole-Cell Oral Cholera Vaccine. Open Forum Infect Dis 2018. [PMCID: PMC6254812 DOI: 10.1093/ofid/ofy210.629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Background Cholera vaccines are recommended for use in outbreaks to prevent infections and reduce severity of disease. Variable immune responses are observed after administration of killed, whole-cell cholera vaccines, and limited data suggest that the gut microbiome may be one factor influencing immune responses to vaccination. Methods. We used microbial DNA sequencing of stool and serum vibriocidal titers to examine the gut microbiome and immune responses to vaccination at day 0, 7, 17 and 44 in adult vaccine recipients in Dhaka, Bangladesh. Using flow cytometry-based bacterial cell sorting, we identified IgA-coated gut microbes in stool before and after vaccination in a subset of patients. Results. Vibriocidal titer magnitude and kinetics were used to classify participants. Within 17 days of vaccination, 86/89 (96%) adults developed a four-fold rise in vibriocidal titer. Gut microbial diversity was not significantly changed after vaccination. Rate of seroconversion (four-fold increase in vibriocidal titer by Day 3 after vaccination) was faster in participants with increased bacteria from the genus Prevotella (multivariate analysis using linear models, q value 0.04). The gut microbes of participants with higher peak vibriocidal titers was characterized by increased Prevotella (3% vs. <0.1% of the total microbiome, P < 0.001 unpaired t-test, linear discriminant analysis score >3.5), particularly the species Prevotella copri (P < 0.001, unpaired t-test, linear discriminant analysis score >3.5). Lipopolysaccharide from Prevotella species is known to increase vaccination-associated antigen-specific antibody titers in animal models. Additionally, IgA coating of gut microbes in stool increased after vaccination, from 8.9% IgA coated at baseline to a peak level of 19% during follow-up (Wilcoxon signed rank test, P < 0.01). Conclusion. Certain microbiome profiles are correlated with greater immune responses to cholera vaccination, and IgA coating of gut bacteria indicates which commensal species may be participating in the mucosal immune response. The potential for modulation of mucosal immune responses based on gut microbial species warrants further study. Disclosures All authors: No reported disclosures.
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Affiliation(s)
- Ana Weil
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, Massachusetts
| | - Taufiq Bhuiyan
- Infectious Diseases Division, International Centre for Diarrheal Disease Research, Bangladesh (ICDDR,B), Dhaka, Bangladesh
| | - Meti Debela
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, Massachusetts
| | - Fahima Chowdhury
- Infectious Diseases Division, International Centre for Diarrheal Disease Research, Bangladesh (ICDDR,B), Dhaka, Bangladesh
| | - Ashraful Khan
- Infectious Diseases Division, International Centre for Diarrheal Disease Research, Bangladesh (ICDDR,B), Dhaka, Bangladesh
| | - Regina LaRocque
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, Massachusetts
| | - Edward Ryan
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, Massachusetts
| | - Stephen B Calderwood
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, Massachusetts
| | - Firdausi Qadri
- Infectious Diseases Division, International Centre for Diarrheal Disease Research, Bangladesh (ICDDR,B), Dhaka, Bangladesh
| | - Jason Harris
- Division of Infectious Diseases, Massachusetts General Hospital, Boston, Massachusetts
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