G. Balakrish Nair, Firdausi Qadri, Jan Holmgren, Ann–Mari Svennerholm et al.
We determined the types of cholera toxin (CT) produced by a collection of 185 Vibrio cholerae O1 strains isolated in Bangladesh over the past 45 years. All of the El Tor strains of V. cholerae O1 isolated since 2001 produced CT of the classical biotype, while those isolated before 2001 produced CT o...
M. Ansaruzzaman, Marcelino Lucas, Jacqueline Deen, N. A. Bhuiyan et al.
Forty-two episodes of Vibrio parahaemolyticus infections were detected in Beira, Mozambique, from January to May 2004. The majority of the isolates (81%) belonged to the pandemic serovars (O3:K6 and O4:K68) of V. parahaemolyticus. The pandemic serovars were positive by group-specific PCR (GS-PCR) an...
Ashrafus Safa, N. A. Bhuyian, Suraia Nusrin, M. Ansaruzzaman et al.
The Matlab variants of Vibrio cholerae O1, defined as hybrids between the classical and El Tor biotypes, were first isolated from hospitalized patients with acute secretory diarrhoea in Matlab, a rural area of Bangladesh. These variants could not be categorized as classical or El Tor biotypes by phe...
Suraia Nusrin, Gulzar Khan, N. A. Bhuiyan, M. Ansaruzzaman et al.
PCR surveillance of the rstR genes of CTX phages in Vibrio cholerae O1 and O139 showed no relationship between the incidence of disease and changes in the rstR but showed variations in their presence in O1 and O139 strains and the occurrence of multiple types in a few strains.
Kaisar A. Talukder, Moydul Islam, Dilip Dutta, Ferdaus Hassan et al.
Twenty-one atypical Shigella flexneri type 4 strains isolated from patients attending the Dhaka treatment center of the International Centre for Diarrhoeal Disease Research, Bangladesh, were extensively characterized and compared with S. flexneri serotypes 4a and 4b. The atypical strains agglutinate...
Kaisar A. Talukder, Zhahirul Islam, Mohammad Aminul Islam, Dilip Dutta et al.
The serotypes of 144 strains of Shigella flexneri serotype 1 (serotypes 1a, 1b, and 1c) isolated from patients attending the Dhaka treatment center of the International Centre for Diarrhoeal Disease Research, Bangladesh, between 1997 and 2001 were serologically confirmed by using commercially availa...
Kaisar A. Talukder, Bijay K. Khajanchi, Mohammed Aminul Islam, Dilip Dutta et al.
<I>Objectives</I>: The aim of the present study was to determine the clonal relationships of ciprofloxacin-resistant <I>Shigella dysenteriae</I> type 1 strains isolated from south Asia, and <I>S. dysenteriae</I> 1 strains associated with epidemics in 1978, 1984 an...
Kaisar A. Talukder, Dilip Dutta, Ashrafus Safa, M. Ansaruzzaman et al.
Of 469 recently isolated Shigella flexneri strains, 452 agglutinated with Shigella flexneri-specific monoclonal antibodies. Of these, 396 could be assigned to 10 of the currently recognized 15 serotypes, with S. flexneri 2b dominating (23.2%). Of the 56 untypeable strains which showed invasive prope...
Suraia Nusrin, Ana I. Gil, N. A. Bhuiyan, Ashrafus Safa et al.
A collection of environmental and clinical strains of Vibrio cholerae O1 isolated from the beginning of the Latin American epidemic of cholera in 1991 to 2003 from multiple locations in Peru were characterized and compared with V. cholerae O1 El Tor strains of the seventh pandemic from the rest of t...
Ashrafus Safa, Nurul A. Bhuiyan, Munirul Alam, David A. Sack et al.
The genomes of the recently described Matlab variants of Vibrio cholerae O1 that are hybrids between classical and El Tor biotypes were compared with those of El Tor and classical biotypes by the use of pulsed-field gel electrophoresis. Dendrograms constructed using the unweighted-pair group method ...
M. Ansaruzzaman, N. A. Bhuiyan, Ashrafus Safa, Marzia Sultana et al.
Vibrio cholerae O1 strains that are hybrids between the classical and El Tor biotypes were isolated during two consecutive years (2004-2005) from diarrheal patients in Mozambique. Similar variants isolated in Bangladesh and recently isolated El Tor strains were analyzed for genetic diversity. Pulsed...
Kaisar A. Talukder, Moydul Islam, Bijay K. Khajanchi, Dilip Dutta et al.
A total of 358 Shigella dysenteriae strains isolated from patients attending the Dhaka treatment center of the International Centre for Diarrheal Disease Research, Bangladesh, between the years 1999 and 2002 were included in this study. S. dysenteriae type 1, the dominant serotype in 1999 (76.4%), d...
G. Balakrish Nair, Ashrafus Safa, N. A. Bhuiyan, Suraia Nusrin et al.
Five strains of Vibrio cholerae O1, one each from an Australian and a New Zealand tourist with gastrointestinal illness returning from an island resort in Fiji and the remaining three from water sources located in the same resort, were extensively characterized. Conventional phenotypic traits that a...
M. Ansaruzzaman, Ashrafuzzaman Chowdhury, Nurul A. Bhuiyan, Marzia Sultana et al.
The genetic characteristics of Vibrio parahaemolyticus strains isolated in 2004 and 2005 in Mozambique were assessed in this study to determine whether the pandemic clone of V. parahaemolyticus O3 : K6 and O4 : K68 serotypes has spread to Mozambique. Fifty-eight V. parahaemolyticus strains isolated ...
Ashrafus Safa, Nurul A. Bhuiyan, Denise Murphy, John Bates et al.
Episodes of cholera stemming from indigenous Vibrio cholerae strains in Australia are mainly associated with environmental sources. In the present study, 10 V. cholerae O1 strains of Australian origin were characterized. All of the strains were serogroup O1 and their conventional phenotypic traits c...
M. Ansaruzzaman, Marzia Sultana, Kaisar A. Talukder, Khorshed Alam et al.
In previous studies with strains of the Shigella dysenteriae provisional serovars E22383 and E23507 from diarrhoeal stools from patients in Bangladesh, two strains of Shigella species were identified as Shigella boydii provisional serovar E16553 by a reference laboratory. Further tests with an antis...
Ashrafus Safa, Jinath Sultana Jime, Farishta Shahel
Cholera is a severe form of watery diarrhea caused by <i>Vibrio cholerae</i> toxigenic strains. Typically, the toxigenic variants of <i>V. cholerae</i> harbor a bacteriophage, cholera toxin phage, integrated in their genome. The <i>ctxAB</i> genes from the phage genome encode the cholera toxin, whic...
Mahjabin Sanam, Chowdhury Fatema Tuz Zohra Hossain, Tahmida Binte Hyder, Reasat Tarannum et al.
The gut microbiota plays a crucial role in various physiological functions, such as the production of microbial compounds and maintaining homeostatic equilibrium by complex host-microbial interactions. However, any shift in the constitution and diversity of the microbiota or abnormal interaction wit...
Hafizur Rahman, Nabila Hoque, Palash Kumar Sarker, Ashrafus Safa
Recently, in Bangladesh, all tannery industries have been relocated to a new location exclusively established for leather processing industries with modern manufacturing facilities and effluent treatment plants with standard probations. Effluents generated from the tannery industries are now being d...
Maqsud Hossain, Samiha Tasnim, Ashrafus Safa, Abdullah Bin Hossain Rayhan et al.
Here, we present the draft genome sequence of Bacillus cereus strain TN10, which exhibited chromium resistance and chromium-reducing ability. The whole-genome sequence analysis of strain TN10 will help us to understand its genetic factors involved in the bioremediation of Cr 6+ .