Now showing items 1-15 of 15

    • Analysis of Salmonella enterica Serotype Paratyphi A Gene Expression in the Blood of Bacteremic Patients in Bangladesh 

      Sheikh, Alaullah; Bhuiyan, Md. Saruar; Khanam, Farhana; Bukka, Archana; Kalsy, Anuj; Porwollik, Steffen; Cravioto, Alejandro; Logvinenko, Tanya; McClelland, Michael; Graham, James E.; Qadri, Firdausi; Charles, Richelle Candice; Rollins, Sean McKenzie; Harris, Jason B.; Brooks, W. Abdullah; Larocque, Regina Celes; Hohmann, Elizabeth Louise; Calderwood, Stephen Beaven; Ryan, Edward Thomas (Public Library of Science, 2010)
      Background: Salmonella enterica serotype Paratyphi A is a human-restricted cause of paratyphoid fever, accounting for up to a fifth of all cases of enteric fever in Asia. Methodology/Principal Findings: In this work, we ...
    • Antibody Secreting Cell Responses following Vaccination with Bivalent Oral Cholera Vaccine among Haitian Adults 

      Matias, Wilfredo R.; Falkard, Brie; Charles, Richelle C.; Mayo-Smith, Leslie M.; Teng, Jessica E.; Xu, Peng; Kováč, Pavol; Ryan, Edward T.; Qadri, Firdausi; Franke, Molly F.; Ivers, Louise C.; Harris, Jason B. (Public Library of Science, 2016)
      Background: The bivalent whole-cell (BivWC) oral cholera vaccine (Shanchol) is effective in preventing cholera. However, evaluations of immune responses following vaccination with BivWC have been limited. To determine ...
    • Cellular and Cytokine Responses to Salmonella enterica Serotype Typhi Proteins in Patients with Typhoid Fever in Bangladesh 

      Bhuiyan, Saruar; Sayeed, Abu; Khanam, Farhana; Leung, Daniel T.; Rahman Bhuiyan, Taufiqur; Sheikh, Alaullah; Salma, Umme; LaRocque, Regina C.; Harris, Jason B.; Pacek, Marcin; Calderwood, Stephen B.; LaBaer, Joshua; Ryan, Edward T.; Qadri, Firdausi; Charles, Richelle C. (The American Society of Tropical Medicine and Hygiene, 2014)
      We assessed interferon-gamma (IFN-γ) responses via enzyme-linked immunosorbent spot (ELISPOT) to a number of S. Typhi antigens in samples from humans with S. Typhi bacteremia and typhoid fever in Bangladesh. Compared with ...
    • A Cholera Conjugate Vaccine Containing O-specific Polysaccharide (OSP) of V. cholerae O1 Inaba and Recombinant Fragment of Tetanus Toxin Heavy Chain (OSP:rTTHc) Induces Serum, Memory and Lamina Proprial Responses against OSP and Is Protective in Mice 

      Sayeed, Md. Abu; Bufano, Meagan Kelly; Xu, Peng; Eckhoff, Grace; Charles, Richelle C.; Alam, Mohammad Murshid; Sultana, Tania; Rashu, Md. Rasheduzzaman; Berger, Amanda; Gonzalez-Escobedo, Geoffrey; Mandlik, Anjali; Bhuiyan, Taufiqur Rahman; Leung, Daniel T.; LaRocque, Regina C.; Harris, Jason B.; Calderwood, Stephen B.; Qadri, Firdausi; Vann, W. F.; Kováč, Pavol; Ryan, Edward T. (Public Library of Science, 2015)
      Background: Vibrio cholerae is the cause of cholera, a severe watery diarrhea. Protection against cholera is serogroup specific. Serogroup specificity is defined by the O-specific polysaccharide (OSP) component of ...
    • Circulating Mucosal Associated Invariant T Cells Are Activated in Vibrio cholerae O1 Infection and Associated with Lipopolysaccharide Antibody Responses 

      Leung, Daniel T.; Bhuiyan, Taufiqur R.; Nishat, Naoshin S.; Hoq, Mohammad Rubel; Aktar, Amena; Rahman, M. Arifur; Uddin, Taher; Khan, Ashraful I.; Chowdhury, Fahima; Charles, Richelle C.; Harris, Jason B.; Calderwood, Stephen B.; Qadri, Firdausi; Ryan, Edward T. (Public Library of Science, 2014)
      Background: Mucosal Associated Invariant T (MAIT) cells are innate-like T cells found in abundance in the intestinal mucosa, and are thought to play a role in bridging the innate-adaptive interface. Methods: We measured ...
    • Comparative Proteomic Analysis of the PhoP Regulon in Salmonella enterica Serovar Typhi Versus Typhimurium 

      Lebrun, Lauren M.; Sheikh, Alaullah; Logvinenko, Tanya; Tarique, Abdullah; Krastins, Bryan; Qadri, Firdausi; Charles, Richelle Candice; Harris, Jason B.; Chase, Michael Richard; Larocque, Regina Celes; Rollins, Sean McKenzie; Hohmann, Elizabeth Louise; Rosenberg, Ian Morley; Sarracino, David A.; Calderwood, Stephen Beaven; Ryan, Edward Thomas (Public Library of Science, 2009)
      Background: S. Typhi, a human-restricted Salmonella enterica serovar, causes a systemic intracellular infection in humans (typhoid fever). In comparison, S. Typhimurium causes gastroenteritis in humans, but causes a systemic ...
    • Comparison of the Performance of the TPTest, Tubex, Typhidot and Widal Immunodiagnostic Assays and Blood Cultures in Detecting Patients with Typhoid Fever in Bangladesh, Including Using a Bayesian Latent Class Modeling Approach 

      Islam, Kamrul; Sayeed, Md. Abu; Hossen, Emran; Khanam, Farhana; Charles, Richelle C.; Andrews, Jason; Ryan, Edward T.; Qadri, Firdausi (Public Library of Science, 2016)
      Background: There is an urgent need for an improved diagnostic assay for typhoid fever. In this current study, we compared the recently developed TPTest (Typhoid and Paratyphoid Test) with the Widal test, blood culture, ...
    • Evaluation in Mice of a Conjugate Vaccine for Cholera Made from Vibrio cholerae O1 (Ogawa) O-Specific Polysaccharide 

      Alam, Mohammad Murshid; Bufano, Megan Kelly; Xu, Peng; Kalsy, Anuj; Yu, Y.; Freeman, Y. Wu; Sultana, Tania; Rashu, Md. Rasheduzzaman; Desai, Ishaan; Eckhoff, Grace; Leung, Daniel T.; Charles, Richelle C.; LaRocque, Regina C.; Harris, Jason B.; Clements, John D.; Calderwood, Stephen B.; Qadri, Firdausi; Vann, W. F.; Kováč, Pavol; Ryan, Edward T. (Public Library of Science, 2014)
      Background: Protective immunity against cholera is serogroup specific. Serogroup specificity in Vibrio cholerae is determined by the O-specific polysaccharide (OSP) of lipopolysaccharide (LPS). Generally, polysaccharides ...
    • Evaluation of a Typhoid/Paratyphoid Diagnostic Assay (TPTest) Detecting Anti-Salmonella IgA in Secretions of Peripheral Blood Lymphocytes in Patients in Dhaka, Bangladesh 

      Khanam, Farhana; Sheikh, Alaullah; Sayeed, Md. Abu; Bhuiyan, Md. Saruar; Choudhury, Feroza Kaneez; Salma, Umme; Pervin, Shahnaz; Sultana, Tania; Ahmed, Dilruba; Goswami, Doli; Hossain, Md. Lokman; Mamun, K. Z.; Charles, Richelle C.; Brooks, W. Abdullah; Calderwood, Stephen B.; Cravioto, Alejandro; Ryan, Edward T.; Qadri, Firdausi (Public Library of Science, 2013)
      Background: Rapid and reliable diagnostic assays for enteric (typhoid and paratyphoid) fever are urgently needed. We report the characterization of novel approach utilizing lymphocyte secretions, for diagnosing patients ...
    • Identification of Immunogenic Salmonella enterica Serotype Typhi Antigens Expressed in Chronic Biliary Carriers of S. Typhi in Kathmandu, Nepal 

      Charles, Richelle C.; Sultana, Tania; Alam, Mohammad Murshid; Yu, Yanan; Wu-Freeman, Ying; Bufano, Meagan Kelly; Rollins, Sean M.; Tsai, Lillian; Harris, Jason B.; LaRocque, Regina C.; Leung, Daniel T.; Brooks, W. Abdullah; Nga, Tran Vu Thieu; Dongol, Sabina; Basnyat, Buddha; Calderwood, Stephen B.; Farrar, Jeremy; Khanam, Farhana; Gunn, John S.; Qadri, Firdausi; Baker, Stephen; Ryan, Edward T. (Public Library of Science, 2013)
      Background: Salmonella enterica serotype Typhi can colonize and persist in the biliary tract of infected individuals, resulting in a state of asymptomatic chronic carriage. Chronic carriers may act as persistent reservoirs ...
    • Immunogenicity of a Killed Bivalent (O1 and O139) Whole Cell Oral Cholera Vaccine, Shanchol, in Haiti 

      Charles, Richelle C.; Hilaire, Isabelle J.; Mayo-Smith, Leslie M.; Teng, Jessica E.; Jerome, J. Gregory; Franke, Molly F.; Saha, Amit; Yu, Yanan; Kováč, Paul; Calderwood, Stephen B.; Ryan, Edward T.; LaRocque, Regina C.; Almazor, Charles P.; Qadri, Firdausi; Ivers, Louise C.; Harris, Jason B. (Public Library of Science, 2014)
      Background: Studies of the immunogenicity of the killed bivalent whole cell oral cholera vaccine, Shanchol, have been performed in historically cholera-endemic areas of Asia. There is a need to assess the immunogenicity ...
    • A magneto-DNA nanoparticle system for the rapid and sensitive diagnosis of enteric fever 

      Park, Ki Soo; Chung, Hyun Jung; Khanam, Farhana; Lee, Hakho; Rashu, Rasheduzzaman; Bhuiyan, Md. Taufiqur; Berger, Amanda; Harris, Jason B.; Calderwood, Stephen B.; Ryan, Edward T.; Qadri, Firdausi; Weissleder, Ralph; Charles, Richelle C. (Nature Publishing Group, 2016)
      There is currently no widely available optimal assay for diagnosing patients with enteric fever. Here we present a novel assay designed to detect amplified Salmonella nucleic acid (mRNA) using magneto-DNA probes and a ...
    • Plasma Leptin Levels in Children Hospitalized with Cholera in Bangladesh 

      Falkard, Brie; Uddin, Taher; Arifur Rahman, M.; Franke, Molly F.; Aktar, Amena; Uddin, Muhammad Ikhtear; Bhuiyan, Taufiqur Rahman; Leung, Daniel T.; Charles, Richelle C.; Larocque, Regina C.; Harris, Jason B.; Calderwood, Stephen B.; Qadri, Firdausi; Ryan, Edward T. (The American Society of Tropical Medicine and Hygiene, 2015)
      Vibrio cholerae, the cause of cholera, induces both innate and adaptive immune responses in infected humans. Leptin is a hormone that plays a role in both metabolism and mediating immune responses. We characterized leptin ...
    • Single-Cell Analysis of the Plasmablast Response to Vibrio cholerae Demonstrates Expansion of Cross-Reactive Memory B Cells 

      Kauffman, Robert C.; Bhuiyan, Taufiqur R.; Nakajima, Rie; Mayo-Smith, Leslie M.; Rashu, Rasheduzzaman; Hoq, Mohammad Rubel; Chowdhury, Fahima; Khan, Ashraful Islam; Rahman, Atiqur; Bhaumik, Siddhartha K.; Harris, Levelle; O'Neal, Justin T.; Trost, Jessica F.; Alam, Nur Haq; Jasinskas, Algis; Dotsey, Emmanuel; Kelly, Meagan; Charles, Richelle C.; Xu, Peng; Kováč, Pavol; Calderwood, Stephen B.; Ryan, Edward T.; Felgner, Phillip L.; Qadri, Firdausi; Wrammert, Jens; Harris, Jason B. (American Society for Microbiology, 2016)
      ABSTRACT We characterized the acute B cell response in adults with cholera by analyzing the repertoire, specificity, and functional characteristics of 138 monoclonal antibodies (MAbs) generated from single-cell-sorted ...
    • Typhoid Fever in Young Children in Bangladesh: Clinical Findings, Antibiotic Susceptibility Pattern and Immune Responses 

      Khanam, Farhana; Sayeed, Md. Abu; Choudhury, Feroza Kaneez; Sheikh, Alaullah; Ahmed, Dilruba; Goswami, Doli; Hossain, Md. Lokman; Brooks, Abdullah; Calderwood, Stephen B.; Charles, Richelle C.; Cravioto, Alejandro; Ryan, Edward T.; Qadri, Firdausi (Public Library of Science, 2015)
      Background: Children bear a large burden of typhoid fever caused by Salmonella enterica serotype Typhi (S. Typhi) in endemic areas. However, immune responses and clinical findings in children are not well defined. Here, ...