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Articles by D. Biswas
Total Records ( 4 ) for D. Biswas
  D. Biswas , S. Das , B.C. Das and A.K.M. Saifuddin
  A 9-year-old virgin German shepherd was admitted with continuous sanguinopurulent vaginal discharge, distended abdomen, and cachexia. The dog was clinically diagnosed with pyometra and successfully cured by ovario-hysterectomy. The results of histo-pathological examination showed that the endometrial glands were larger than normal and that part of the endometrial wall had sloughed off and become infiltrated with mostly neutrophils. This is the first case report of endometritis and cystic endometrial hyperplasia in a virgin German shepherd in Bangladesh.
  M.M. Islam , D. Biswas , M.M. Rahman and M.A. Haque
  Twenty star crossbred broilers of 5 weeks age were taken and divided into 4 groups to know the suitable method of fracture immolization. The fixation devices used were adhesive tape with wood splint, intramedullary pinning and dynamic compression plate with cortical screws and one group as control kept in case rest. To monitor the healing status, the radiographs were taken at 3rd, 4th and 6th postoperative weeks. Minimal fracture gap, callus formation and excellent alignment were found in dynamic compression plate. Fracture gap reduces significantly (P<0.01) with small callus formation and good alignment in dynamic compression plate group but similar result along with larger callus found in intramedullary group. The present study suggested that dynamic compression plate is the best method for fixation of fractured bone in birds.
  D. Biswas , F.Y. Bari , M. Shamsuddin , M.M. Rahman and M.M. Rahman
  The percentages of glycerol level were determined for long time buck semen preservation and the highest post-thaw motility was observed using fifty-four ejaculates, collected twice in a week from the 3 mature Black Bengal Bucks (18 from each buck). Every 6 ejaculates from each buck were preserved in liquid nitrogen with different percentages of glycerol with tris-glucose-citric acid-egg yolk media by one-step dilution method. The motility was observed in fresh semen, two hours after chilling and 24 hours after freezing. In fresh semen there was no significant variation on sperm motility either between bucks or within the buck. Two hours after chilling the sperm motility was significantly higher (P<0.01) in 7% glycerol added diluents than that of 5 and 10% glycerol. Similar results were also observed following 24 hours after freezing (P<0.01), where the highest post-thaw motility was 52%. Therefore, 7% glycerol containing media appear to be suitable for preserving the Black Bengal Buck semen for future use.
  P.K. Biswas , B.K. Sil , R. Faruque , S. Ahmed , D. Biswas and S. Chowdhury
  A disease outbreak was investigated in a commercial broiler parent stock farm. The outbreak began at the mid of May 2000 and continued more than one month. During the period mortality was recorded around 4 % in the affected shed, flock strength of which was 5000 birds. During post mortem examination the pericardial sac was found engorged with straw colour pericardial fluid. Numerous subcapsular petechial and ecchymotic haemorrhages were seen in liver. No bacterial growth was found after 48 hours of incubation on Muller-Hinton and MacConkey agar surfaces inoculated from the pathological sample. But poor viral growth was recorded in chick embryo fibroblast cell culture propagated inoculums making from heart and liver. Harvested virus using as antigen source from the growth was found reacted positively in agar gel precipitation test with reference conventional adenovirus polyvalent antiserum. Two of the four randomly collected serum samples of the affected flock at day 20 of the outbreak were also found reacting positively with the known reference antigen produced by the same institute. Not having the type specific antiserum the present study failed to elucidate the stereotype (s) that involved in the said outbreak. Nevertheless, the study seems to be the first report of adenoviral induced hydropericardium-hepatitis syndrome or leechi heart disease affecting chicken in Bangladesh.
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