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Articles by I.M. Hassan
Total Records ( 2 ) for I.M. Hassan
  Y.A. Yabo , A.A. Raji , L.O. Muftahu , J. Abdullahi , A.H. Jibril and I.M. Hassan
  Background and Objective: Aflatoxins are among the top common courses of aflatoxicosis in poultry. In addition to the huge economic implications of aflatoxicosis to the poultry industry, aflatoxins are life-threatening to birds when present above the standard tolerable limit in poultry feed. Despite several reports on the levels of aflatoxin present in tested feed samples, natural cases of aflatoxicosis in poultry are rarely reported. The present study was conducted to report a natural case of aflatoxicosis in two different poultry farms where laying hens were fed with an aflatoxin contaminated feed. Materials and Methods: We collected a sample of poultry feed suspected to be contaminated with aflatoxins for analysis. Direct competitive ELISA using AgraQuant® total aflatoxin (TA) test kit was used to quantify the total aflatoxin level in the collected feed sample. Results: Laboratory analysis of the feed sample showed a high level of total aflatoxin of up to 320 ppb (parts per billion). This is 15 times above the FAO action point (20 ppb) for total aflatoxin in finished poultry feed. A post-mortem examination of the affected birds revealed typical lesions associated with aflatoxicosis. Interestingly, hens raised in a deep litter system showed more resistance to the same level of aflatoxin exposure when compared to hens raised in the cage system. Conclusion: We conclude that there is a surge in the natural cases of aflatoxicosis in poultry due to high level of aflatoxins in poultry feed, especially in developing tropical countries like Nigeria. We postulate that physical exercise could affect the rate of aflatoxin metabolism in poultry.
  A-N.A. Hussein , I.M. Hassan and R.M.A. Khalifa
  Light Microscopy (LM) and Scanning Electron Microscopy (SEM) were used to study the egg and miracidium of Fasciola gigantica and redia, cercaria and metacercaria from field infected Lymnaea (cailliaudi) natalensis snails, to analyze the differences between eggs and intra-molluscan stages of F. hepatica and F. gigantica in a zone of sympatry. The egg of F. gigantica has an umbilicus-like invagination at the posterior end of the egg shell. The emerged miracidium has an elongated conical body that has a broad anterior end and tapering posterior end. The surface was found to be covered with varied lengths of cilia except regions of lateral connection of epidermal plates. The redia of Fasciola sp. has a caudal papilliform process. Tail of cercaria was found to be provided with two fin folds. Steps of encystation of the cercaria were described as a variable morphological change in cercarial body and cyst wall.
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