Seroprevalence of Mycoplasma gallisepticum antibody by ELISA and serum plate agglutination test of laying chicken.

Md Zulfekar Ali,Shirin Sultana,Md Mostafizer Rahman

doi:10.14202/vetworld.2015.9-14

Abstract

Aim:Mycoplasma gallisepticum (MG) is important avian pathogen responsible for chronic respiratory disease of chicken and turkeys, which result in large economic loss for the poultry industry. The objectives of this study were determination of seroprevalence of MG antibody of commercial layer chicken at laying period in selected areas of Bangladesh.Materials and Methods:A total of 563 blood samples were collected randomly from selected commercial layer chickens at laying period during the period from July to December, 2013. Indirect enzyme linked immunosorbent assay (iELISA) and serum plate agglutination (SPA) test were performed to detect the presence of antibodies against MG.Results:Of 563 samples, 64.47% and 56.13% showed an overall prevalence of MG antibodies in iELISA and SPA test respectively. Prevalence of MG was recorded the highest (69.63%) at 50-55 weeks of age compared with lowest (53.26%) at 56-61 weeks of age (p<0.05). Significant (p<0.05) effect of breed were observed in the seroprevalence of MG infection in layer birds in the present study. The overall, 68.77%, 63.74% and 59.37% prevalence were found respectively in sonali, ISA Brown and White leg horn. The prevalence of MG antibodies was the highest (70.13%) in December followed by November (68%), October (65.67%), August (63.46%), September (58.54%) and July (51.78%) month. The seroprevalence of MG antibodies was higher (69.63%) in most of the large flocks and lower (56.82%) in small flocks.Conclusion:Therefore, might be suggested that the commercial layer farms should be routinely checked to monitor MG infection and the reactor birds should be culled since MG organism has the potential to transmit vertically. The correlation between MG antibody in month and flock size was not significant (p=0.359 and p=0.868, respectively).

Highlights

Poultry rearing is playing a role for the poverty alleviation and income generation in Bangladesh
Conclusion: might be suggested that the commercial layer farms should be routinely checked to monitor Mycoplasma gallisepticum (MG) infection and the reactor birds should be culled since MG organism has the potential to transmit vertically
The seroprevalence of MG antibody in commercial layer farms at laying period of different upazila of Bogra district was studied by indirect enzyme linked immunosorbent assay (ELISA) test and serum plate agglutination (SPA) test

Summary

Introduction

Poultry rearing is playing a role for the poverty alleviation and income generation in Bangladesh. There are more than 130 hatcheries producing 3.4 million day old chicks per week and about 30,000 commercial broiler and layer farms supplying 0.2 million metric tons of poultry meat and 5210 million table eggs per year [1]. One of the major constraints of poultry farming in Bangladesh is the outbreaks of different infectious diseases. Mycoplasma gallisepticum (MG) is a highly infectious respiratory pathogen affecting poultry. The disease causes a drop in egg production and an increase in embryo mortality [2]. Production losses between 10 and 20% have been reported in layers [3]. In Bangladesh the prevalence of mycoplasmosis markedly increased

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