Death due to Poisoning - a Medicolegal Study at Dhaka Medical College, Dhaka.

Self destruction or suicide by pesticide poisoning is a burning problem of Bangladesh. Rapid development in science and rapid growth in agricultural activities has led to the increase in the incidences of poisoning. The objective of this study was to find out the incidences and pattern of poisoning in an urban area, different aspects of poisoning along with demographic pattern, social factors related and other related perimeter, and modality to prevent loss of precious life due to poisoning. This retrospective cross sectional study was conducted among victims of poisoning at Dhaka Medical College, Dhaka Morgue during the period of January 2008-December 2009. Specific identification of poisons was made from Chemical Examiner's report. All the data were later on analyzed. A total of 5114 medico legal post mortems were performed during this study period. Among these 300 (5.87%) cases were suspected poisoning. Out of these cases specific poisons were identified in 131 (43.66%) cases. Among the detected poisoning cases OPC was the commonest agent 103 (78.63%) followed by alcohol/rectified spirit 12 (9.16%) and barbiturate 7 (5.34%). No poison was detected (Negative results) in 116 (38.66%) cases and no reports from chemical examiner were received in 53 (17.66%) cases during the study period. Out of 300 victims 174 (58%) were male and 126 (42%) were female. Highest incidence of poisoning was observed in 21-30 years age group 117 (39%) followed by age group of 31-40 years 84 (28%). Most of the victims were agricultural workers/ farmers 108 (36%) followed by housewives 51 (17%). Among the study subjects 178 (59.33%) were illiterate and 198 (66%) were married. Considering manner of death 274 (91.33%) victims committed suicide by poisoning and rests 26 (8.67%) were due to accidental poisoning. To reduce poisoning cases proper emphasis should be given for safe use of pesticides and consciousness should be created among the population about poisonous compounds. Detail study regarding death due to poisoning is required to be carried out in this country.

Inhibition of bacterial respiration by a low-molecular weight lectin, scyllin, from Scylla serrata crab hemolymph.

Interaction of plant and/or invertebrate lectins with mammalian cells and different microorganisms is well known. In the present study, we have demonstrated that scyllin, a low molecular weight (MW 4000) lectin from the edible crab Scylla serrata hemolymph, purified by GalNAc-Sepharon affinity column followed by Mono-Q ion exchanger in FPLC exhibits antimicrobial activity against Bacillus cereus and Escherichia coli by inhibiting endogenous respiration as well as exogenous glucose oxidation. In both the cases oxygen consumption has been measured in an oxygraph. Scyllin has produced 50% inhibition of endogenous respiration at a concentration of 110 micrograms/ml and 125 micrograms/ml in B. cereus and E. coli respectively. It also reduced the exogenous glucose oxidation by 50% at a concentration of 12 micrograms/ml and 80 micrograms/ml respectively in B. cereus and E. coli. From the above study the mechanism of bacterial growth inhibitory property of scyllin is suggested though the other studies such as inhibition of nucleic acid biosynthesis, cell wall biosynthesis etc. to evaluate its total mode of inhibitory action are not yet obtained.

Study of the presence of rabies virus in indigenous bats.

One hundred and thirteen fruit eating and insectivorous bats were captured from different parts of Bangladesh. Antemortem and post mortem examinations of the bats for rabies were conducted. Microscopic studies and biological tests were carried-out with bat's brain for the detection of rabies virus. The results were negative. It may therefore, be concluded that the insectivorous and fruit eating bats from different parts of Bangladesh do not act as the reservoir for rabies virus.

Studies of the presence of rabies virus among stray dogs in Dhaka City.

One hundred and thirty one stray dogs were captured from Dhaka City. Anti-mortem as well post-mortem examination of the dogs for rabies were conducted. Microscopic studies and biological tests were carried-out with dog's brain for the detection of rabies virus. One dog was found to have rabies virus in its brain. The stray dogs under Dhaka Municipal Corporation area therefore, seem to harbour rabies virus in their brains and could be a source of potential danger to the community after the full development of the disease.