David A. Sack, R. Bradley Sack, G. Balakrish Nair, Siddique Ak
Intestinal infection with Vibrio cholerae results in the loss of large volumes of watery stool, leading to severe and rapidly progressing dehydration and shock. Without adequate and appropriate rehydration therapy, severe cholera kills about half of affected individuals. Cholera toxin, a potent stim...
K Zaman, Dang Duc Anh, John C. Victor, Sunheang Shin et al.
Background Rotavirus vaccine has proved effective for prevention of severe rotavirus gastroenteritis in infants in developed countries, but no efficacy studies have been done in developing countries in Asia. We assessed the clinical efficacy of live oral pentavalent rotavirus vaccine for prevention ...
G. Balakrish Nair, Thandavarayan Ramamurthy, Sujit Bhattacharya, Basabjit Dutta et al.
Vibrio parahaemolyticus is recognized as a cause of food-borne gastroenteritis, particularly in the Far East, where raw seafood consumption is high. An unusual increase in admissions of V. parahaemolyticus cases was observed at the Infectious Diseases Hospital in Calcutta, a city in the northeastern...
Rita R. Colwell, Anwar Huq, M. Sirajul Islam, K. M. A. Aziz et al.
Based on results of ecological studies demonstrating that Vibrio cholerae, the etiological agent of epidemic cholera, is commensal to zooplankton, notably copepods, a simple filtration procedure was developed whereby zooplankton, most phytoplankton, and particulates >20 microm were removed from wate...
Shah M. Faruque, Iftekhar Bin Naser, M. Johirul Islam, Abu Syed Golam Faruque et al.
The relationship among (i) the local incidence of cholera, (ii) the prevalence in the aquatic environment of Vibrio cholerae, and (iii) bacterial viruses that attack potentially virulent O1 and O139 serogroup strains of this organism (cholera phages) was studied in Dhaka, Bangladesh. Over nearly a 3...
Mark L. Tamplin, Anne L. Gauzens, Anwar Huq, David A. Sack et al.
Vibrio cholerae serogroup O1, the causative agent of cholera, is capable of surviving in aquatic environments for extended periods and is considered an autochthonous species in estuarine and brackish waters. These environments contain numerous elements that may affect its ecology. The studies report...
JohnD Clemens, Jeffrey R. Harris, M. R. Khan, BradfordA. Kay et al.
The protective efficacy of oral B subunit killed whole-cell (BS-WC) and killed whole-cell (WC) cholera vaccines was assessed in 63 498 Bangladeshi children aged 2-15 years and women aged over 15 years. Each received three doses of BS-WC, WC, or placebo in a randomised, double-blinded fashion. Survei...
John D. Clemens, David A. Sack, Jeffrey R. Harris, J. Chakraborty et al.
The B subunit (BS) of cholera toxin and that of the heat-labile enterotoxin (LT) of enterotoxigenic Escherichia coli (ETEC) are antigenically similar. We therefore assessed whether a combined cholera toxin BS/whole-cell (BS-WC) oral vaccine against cholera conferred cross-protection against LT-produ...
Shah M. Faruque, Kuntal Biswas, S. M. Nashir Udden, Qazi Shafi Ahmad et al.
The factors that enhance the waterborne spread of bacterial epidemics and sustain the epidemic strain in nature are unclear. Although the epidemic diarrheal disease cholera is known to be transmitted by water contaminated with pathogenic Vibrio cholerae, routine isolation of pathogenic strains from ...
Mohammad Ali, Michael Emch, Lorenz von Seidlein, Mohammad Yunus et al.
Background Decisions about the use of killed oral cholera vaccines, which confer moderate levels of direct protection to vaccinees, can depend on whether the vaccines also provide indirect (herd) protection when high levels of vaccine coverage are attained. We reanalysed data from a field trial in B...
Anwar Huq, R. Bradley Sack, Azhar Nizam, Ira M. Longini et al.
The occurrence of outbreaks of cholera in Africa in 1970 and in Latin America in 1991, mainly in coastal communities, and the appearance of the new serotype Vibrio cholerae O139 in India and subsequently in Bangladesh have stimulated efforts to understand environmental factors influencing the growth...
Rubhana Raqib, Protim Sarker, Peter Bergman, Gul Ara et al.
Shigella is a major cause of morbidity, mortality, and growth retardation for children in developing countries. Emergence of antibiotic resistance among Shigellae demands the development of effective medicines. Previous studies found that the endogenous antimicrobial peptide LL-37 is down-regulated ...
G. Balakrish Nair, Shah M. Faruque, N. A. Bhuiyan, Muhammad Kamruzzaman et al.
ABSTRACT The sixth pandemic of cholera and, presumably, the earlier pandemics were caused by the classical biotype of Vibrio cholerae O1, which was progressively replaced by the El Tor biotype representing the seventh cholera pandemic. Although the classical biotype of V. cholerae O1 is extinct, eve...
Masahiro Hashizume, Ben Armstrong, Shakoor Hajat, Yukiko Wagatsuma et al.
BACKGROUND: We estimated the effects of rainfall and temperature on the number of non-cholera diarrhoea cases and identified population factors potentially affecting vulnerability to the effect of the climate factors in Dhaka, Bangladesh. METHODS: Weekly rainfall, temperature and number of hospital ...
Shah M. Faruque, M. Johirul Islam, Qazi Shafi Ahmad, Abu Syed Golam Faruque et al.
Phage predation of Vibrio cholerae has recently been reported to be a factor that influences seasonal epidemics of cholera in Bangladesh. To understand more about this phenomenon, we studied the dynamics of the V. cholerae-phage interaction during a recent epidemic in Dhaka. Because the outbreak str...