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Research Journal for Veterinary Practitioners

Research Article
Res. j. vet. pract. 2 (2): 36 - 39
http://dx.doi.org/10.14737/journal.rjvp/2014/2.2.36.39
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Mohammed Arif Uddin1, Kamrul Islam1, Shaharin Sultana4, Mohammed Ashif Imtiaz2*, Abul Kashem Md. Saifuddin2, Mukti Barua3
1Department of Microbiology, Chittagong Veterinary and Animal Sciences University (CVASU); 2Department of Physiology, Biochemistry and Pharmacology, CVASU; 3Department of Animal Science and Animal Nutrition, CVASU, Chittagong, Bangladesh; 4Department of Microbiology, Bangladesh Agricultural University (BAU), Mymensingh, Dhaka, Bangladesh.
*Corresponding author: ashif.shawn@gmail.com

ABSTRACT
This research work was conducted to screen out the seroprevalence and immune status of layer chicken against Newcastle Disease Virus (NDV) in Cox’s Bazar, Bangladesh. From 17 different commercial layer farms, a total of 179 serum samples were collected and divided into three age groups such as 20–27 weeks, 36–42 weeks and 48 to above weeks. Haemagglutination Inhibition (HI) test was performed and calculated geometric mean titers for layer groups of 20–27 weeks, 36–42 weeks and 48 to above weeks of age were log28.39, log27.67 and log210.66, respectively. Though all birds showed positive specific immunity of 100%, means good mean titers that was protective to ND, still the birds remained susceptible to ND. So vaccination should be intensified by screening immune status of the flock against ND through analyzing the HI titers to NDV.

Key Words: Newcastle Disease Virus, Serum, Haemagglutination, Haemagglutination Inhibition