Simon Le Hello, Amany Bekhit, Sophie A. Granier, Himel Barua et al.
While the spread of Salmonella enterica serotype Kentucky resistant to ciprofloxacin across Africa and the Middle-East has been described recently, the presence of this strain in humans, food, various animal species (livestock, pets, and wildlife) and in environment is suspected in other countries o...
Paritosh Kumar Biswas, Jens Peter Christensen, Syed Sayeem Uddin Ahmed, Himel Barua et al.
To determine the epidemiology of outbreaks of avian influenza A virus (subtypes H5N1, H9N2) in chickens in Bangladesh, we conducted surveys and examined virus isolates. The outbreak began in backyard chickens. Probable sources of infection included egg trays and vehicles from local live bird markets...
Paritosh Kumar Biswas, Jens Peter Christensen, Syed Sayeem Uddin Ahmed, Ashutosh Das et al.
To evaluate risk factors for infection with highly pathogenic avian influenza A virus (H5N1) in backyard chickens in Bangladesh, we conducted a matched case-control study. We enrolled 25 case farms (cases March-November 2007) and 75 control farms (June-November 2007). We used a questionnaire to coll...
Himel Barua, Paritosh Kumar Biswas, Katharina E. P. Olsen, Jens Peter Christensen
Salmonella is a globally widespread food-borne pathogen having major impact on public health. All motile serovars of Salmonella enterica of poultry origin are zoonotic, and contaminated meat and raw eggs are an important source to human infections. Information on the prevalence of Salmonella at farm...
Syed Sayeem Uddin Ahmed, Annette Kjær Ersbøll, Paritosh Kumar Biswas, Jens Peter Christensen et al.
BACKGROUND: The agro-ecology and poultry husbandry of the south Asian and south-east Asian countries share common features, however, with noticeable differences. Hence, the ecological determinants associated with risk of highly pathogenic avian influenza (HPAI-H5N1) outbreaks are expected to differ ...
Himel Barua, Paritosh Kumar Biswas, Katharina E. P. Olsen, Subrata Kumar Shil et al.
Contaminated poultry and poultry products are a major source of motile Salmonellae for human salmonellosis worldwide. Local circulation of any motile Salmonella serovar in poultry has a wider public health impact beyond its source of origin for being dispersed elsewhere through poultry trades or hum...
Paritosh Kumar Biswas, Jens Peter Christensen, Syed Sayeem Uddin Ahmed, Himel Barua et al.
A matched case-control study was carried out to identify risk factors for highly pathogenic avian influenza A virus (subtype H5N1) infection in commercial chickens in Bangladesh. A total of 33 commercial farms diagnosed with H5N1 before September 9, 2007, were enrolled as cases, and 99 geographicall...
Syed Sayeem Uddin Ahmed, Annette Kjær Ersbøll, Paritosh Kumar Biswas, Jens Peter Christensen
Bangladesh faced two epidemic waves of highly pathogenic avian influenza (HPAI) H5N1 in two consecutive years. The peaks of the waves were observed in February-July 2007 and January-April 2008, respectively. We examined the spatial and temporal patterns of the 293 outbreaks in 143 subdistricts in 20...
Himel Barua, Paritosh Kumar Biswas, Kaisar A. Talukder, Katharina E. P. Olsen et al.
We investigated Salmonella enterica isolates from human clinical cases of gastroenteritis to determine the distribution of non-typhoidal Salmonella serovars in the human population, and compared them to isolates originating from poultry by serotyping, phage typing, plasmid profiling, pulsed-field ge...
Syed Sayeem Uddin Ahmed, Annette Kjær Ersbøll, Paritosh Kumar Biswas, Jens Peter Christensen et al.
BACKGROUND: The number of outbreaks of HPAI-H5N1 reported by Bangladesh from 2007 through 2011 placed the country among the highest reported numbers worldwide. However, so far, the understanding of the epidemic progression, direction, intensity, persistence and risk variation of HPAI-H5N1 outbreaks ...
Paritosh Kumar Biswas, Md Zohorul Islam, Subrata Kumar Shil, R. Chakraborty et al.
SUMMARY Unprecedented high rates of anthrax outbreaks have been observed recently in cattle and humans in Bangladesh, with 607 human cases in 2010. By enrolling 15 case and 15 control cattle smallholdings in the spatial zone in July-September 2010, we conducted a case-control study, data of which we...
Paritosh Kumar Biswas, M. Hasibur Rahman, Ashutosh Das, Syed Sayeem Uddin Ahmed et al.
Small-scale commercial chicken farms (FAO-defined system 3) with poor biosecurity predominate in developing countries including Bangladesh. By enroling fifteen highly pathogenic avian influenza (HPAI) cases occurring in such farms - (February - April 2008) and 45 control farms (March-May 2008) with ...
Syed Sayeem Uddin Ahmed, Gonçalo Espregueira Themudo, Jens Peter Christensen, Paritosh Kumar Biswas et al.
Bangladesh has been severely hit by highly pathogenic avian influenza H5N1 (HPAI-H5N1). However, little is known about the genetic diversity and the evolution of the circulating viruses in Bangladesh. In the present study, we analyzed the hemagglutinin gene of 30 Bangladeshi chicken isolates from 20...
Paritosh Kumar Biswas, Jens Peter Christensen, Syed Sayeem Uddin Ahmed, Himel Barua et al.
A retrospective study was performed to assess the mortality rates and clinical signs in commercial and backyard chickens naturally infected with the highly pathogenic avian influenza (HPAI) H5N1 virus in Bangladesh. All of the 33 commercial and 25 backyard farms, recorded during the first wave of HP...
Himel Barua, Ina Lucilia Lindblom, Magne Bisgaard, Jens Peter Christensen et al.
Salmonella enterica serovar Typhimurium phage type DT41 has previously been identified from salmonella-positive broiler breeder flocks in Denmark and isolates obtained from different flocks have demonstrated major diversity by multiple-locus variable-number tandem-repeats analysis (MLVA) typing. To ...
Md Zohorul Islam, Jens Peter Christensen, Paritosh Kumar Biswas
We investigated faecal samples collected from the rectum of 518 cattle on 371 randomly selected smallholdings in Bangladesh for the presence of sorbitol non-fermenting (SN-F) shiga toxin-producing Escherichia coli (STEC). The SN-F isolates were tested for the presence of rfb O157, stx1, stx2, eae an...
Krisna Roy, Magne Bisgaard, Niels Christian Kyvsgaard, Jens Peter Christensen et al.
Wild-type (WT) and small-colony-variant (SCV) strains of Streptococcus equi subsp. zooepidemicus have recently been isolated from a layer flock in Denmark experiencing high mortality. To investigate the disease-causing potential of SCV compared with WT, a 2-week long infection study was performed in...
Krisna Roy, Mads F. Bertelsen, Susanne Elisabeth Pors, Kasper Werner Johansen et al.
Streptococcus zooepidemicus has recently been shown to be a severe pathogen in layer chickens, where it is able to cause serious lesions in the vascular system. To evaluate the haemostatic response, 10 layer chickens were inoculated intravenously with S. zooepidemicus. Four hypotheses were tested: t...
Krisna Roy, Mads Kjelgaard‐Hansen, Susanne Elisabeth Pors, Jens Peter Christensen et al.
To evaluate Ovo-transferrin (OTF), a positive acute-phase protein in chickens, as a diagnostic biomarker of selected bacterial infections we checked the performance of a commercial Chicken-OTF-ELISA (ICL, Inc., Portland, OR, USA) by analytical and overlap performances using two groups of serum sampl...
Md Zohorul Islam, Syed Sayeem Uddin Ahmed, Md. Faruk Hossain, Altaf Mahmood et al.