Firdausi Qadri, Swadesh K. Das, Abu Syed Golam Faruque, George J. Fuchs et al.
The prevalence of toxin types and colonization factors (CFs) of enterotoxigenic Escherichia coli (ETEC) was prospectively studied with fresh samples (n = 4,662) obtained from a 2% routine surveillance of diarrheal stool samples over 2 years, from September 1996 to August 1998. Stool samples were tes...
Stefan Schild, Rita Tamayo, Eric J. Nelson, Firdausi Qadri et al.
The facultative pathogen Vibrio cholerae can exist in both the human small bowel and in aquatic environments. While investigation of the infection process has revealed many factors important for pathogenesis, little is known regarding transmission of this or other water-borne pathogens. Using a temp...
Qifang Bi, Eva Ferreras, Lorenzo Pezzoli, Dominique Legros et al.
BACKGROUND: Killed whole-cell oral cholera vaccines (kOCVs) are becoming a standard cholera control and prevention tool. However, vaccine efficacy and direct effectiveness estimates have varied, with differences in study design, location, follow-up duration, and vaccine composition posing challenges...
Ana A. Weil, Ashraful Islam Khan, Fahima Chowdhury, Regina C. LaRocque et al.
BACKGROUND: Multiple Vibrio cholerae infections in the same household are common. The objective of this study was to examine the incidence of V. cholerae infection and associated clinical symptoms in household contacts of patients with cholera and to identify risk factors for development of severe d...
Kimberley D. Seed, Shah M. Faruque, John J. Mekalanos, Stephen B. Calderwood et al.
The Vibrio cholerae lipopolysaccharide O1 antigen is a major target of bacteriophages and the human immune system and is of critical importance for vaccine design. We used an O1-specific lytic bacteriophage as a tool to probe the capacity of V. cholerae to alter its O1 antigen and identified a novel...
Firdausi Qadri, Thomas F. Wierzba, Mohammad Ali, Fahima Chowdhury et al.
BACKGROUND: A single-dose regimen of the current killed oral cholera vaccines that have been prequalified by the World Health Organization would make them more attractive for use against endemic and epidemic cholera. We conducted an efficacy trial of a single dose of the killed oral cholera vaccine ...
Firdausi Qadri, Farhana Khanam, Xinxue Liu, Katherine Theiss-Nyland et al.
BACKGROUND: Typhoid fever remains a major cause of morbidity and mortality in low-income and middle-income countries. Vi-tetanus toxoid conjugate vaccine (Vi-TT) is recommended by WHO for implementation in high-burden countries, but there is little evidence about its ability to protect against clini...
Kimberley D. Seed, K. Bodi, Andrew M. Kropinski, Hans‐Wolfgang Ackermann et al.
ABSTRACT Lytic bacteriophages are hypothesized to contribute to the seasonality and duration of cholera epidemics in Bangladesh. However, the bacteriophages contributing to this phenomenon have yet to be characterized at a molecular genetic level. In this study, we isolated and sequenced the genomes...
Firdausi Qadri, Ashraful Islam Khan, Abu Syed Golam Faruque, Yasmin Ara Begum et al.
Flooding in Dhaka in July 2004 caused epidemics of diarrhea. Enterotoxigenic Escherichia coli (ETEC) was almost as prevalent as Vibrio cholerae O1 in diarrheal stools. ETEC that produced heat-stable enterotoxin alone was most prevalent, and 78% of strains had colonization factors. Like V. cholerae O...
Cynthia L. Sears, Salequl Islam, Amit Saha, Maleka Arjumand et al.
BACKGROUND: Diarrheal illnesses remain a leading cause of morbidity and mortality globally, with increasing recognition of long-term sequelae, including postinfectious irritable bowel syndrome and growth faltering, as well as cognitive deficits in children. Identification of specific etiologic agent...
Md Mahfuz Al Mamun, Kaiissar Mannoor, Jun Cao, Firdausi Qadri et al.
Cancer stem cells (CSCs), a minor subpopulation of tumor bulks with self-renewal and seeding capacity to generate new tumors, posit a significant challenge to develop effective and long-lasting anti-cancer therapies. The emergence of drug resistance appears upon failure of chemo-/radiation therapy t...
Abdullah Siddique, G. Balakrish Nair, Munirul Alam, David A. Sack et al.
During epidemics of cholera in two rural sites (Bakerganj and Mathbaria), a much higher proportion of patients came for treatment with severe dehydration than was seen in previous years. V. cholerae O1 isolated from these patients was found to be El Tor in its phenotype, but its cholera toxin (CT) w...
Firdausi Qadri, Mohammad Ali, Fahima Chowdhury, Ashraful Islam Khan et al.
Background Cholera is endemic in Bangladesh with epidemics occurring each year. The decision to use a cheap oral killed whole-cell cholera vaccine to control the disease depends on the feasibility and effectiveness of vaccination when delivered in a public health setting. We therefore assessed the f...
Mike S. Son, Christina Megli, Gabriela Kovacikova, Firdausi Qadri et al.
Vibrio cholerae serogroup O1, the causative agent of the diarrheal disease cholera, is divided into two biotypes: classical and El Tor. Both biotypes produce the major virulence factors toxin-coregulated pilus (TCP) and cholera toxin (CT). Although possessing genotypic and phenotypic differences, El...
Firdausi Qadri, Christine Wennerås, M. John Albert, Jaber Hossain et al.
Vibrio cholerae O139 has recently emerged as the second etiologic agent of cholera in Asia. A study was carried out to evaluate the induction of specific immune responses to the organism in V. cholerae O139-infected patients. The immune responses to V. cholerae O139 Bengal were studied in patients b...