Clinical and pathological observations in cumulative aflatoxicosis among different ages of duck breeds

B.K. Panda, S.K. Sahoo, S.C. Giri and M.K. Padhi
Regional Centre, Central Avian Research Institute,
front of Kaling Studio, Bhubaneswar

Four different breeds of ducks two layer namely Khaki Campbell, Native ducks type and two meat types like White Pekin and Moti Hans are reared at the Regional Centre of C.A.R.I located at Bhubaneswar. The ducks were fed with chicken starter, grower and layer type of feeds depending on their age groups. The growth and performances found to be optimum until May 2004.In the middle of June 2004 the egg production started decreasing instead of increasing in the age group of 20 weeks layer Khaki ducks which laid the first egg at 116 days of age. The egg production came down from 70% to 10% during August 2004.There was fall of feathers, decrease in body weight, poor feed consumption. The analysis of the compound feed fed to these ducks revealed 24-38 ppb of aflatoxins. In young and growing ducklings, there was discoloration of shank, toe, with marked lameness and regular mortality. The hatchability during this period was very low. The clinical symptoms are more severe in case of Khaki Campbell as compared to other breeds. The Moti Hans found to be resistant to this level of aflatoxins.

The post mortem lesions recorded are enlarged liver with pale to gray coloration, severe nephritis with petechiae; hemorrhages are noted in the pancreas and subcutaneous hemorrhages in the shank and abdominal skins. The histopathological changes of liver and kidney revealed degenerative changes and hyperplasia. The quantitative analysis of the feed samples in thin layer chromatography revealed 24-38 ppm of aflatoxins in the compound feed used during this period. The feed was replaced with addition of wheat in place of maize and the affected birds gradually recovered reaching the peak production of about 90% after 40 days.

Source : IPSACON-2005

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