Abstract
Avian mycoplasmosis, mainly caused by Mycoplasma gallisepticum (MG) and Mycoplasma synoviae (MS) is an economically important disease of the poultry industry. The present study was aimed to develop whole cell based indirect-ELISA (i-ELISA) and DOT blot assay (DOT-ELISA) as rapid, sensitive, specific and economical sero-detection tests for MG and MS. A total of 306 blood samples were collected from birds slaughtered at local meat shops of different districts of Haryana, India to detect MG and MS antibodies. Sonicated antigens prepared from freshly grown culture of MG and MS were used to develop i-ELISA and DOT blot assay. In i-ELISA, 50.32% and 61.76% serum samples were found to be positive for MG and MS antibodies, respectively. However in DOT blot assay, 41.83% and 53.92% serum samples were found positive for MG and MS antibodies, respectively. The relative diagnostic sensitivity and specificity of DOT-ELISA were measured considering i-ELISA as a reference test. The relative diagnostic sensitivity of the DOT blot assay was found to be 69.48% and 82.01%; whereas relative diagnostic specificity was 86.18% and 91.45% for the detection of MG and MS antibodies, respectively. The developed serological assays may be used as rapid and economical diagnostic tools for large scale screening of poultry sera for MG and MS antibodies.
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