PREVALENCE OF MYIASIS WITH ISOLATION AND IDENTIFICATION OF BACTERIA FROM MYIATIC WOUNDS

Abstract

Myiasis is one of the most common and widespread clinical problems in Bangladesh. Although myiasis causes heavy economic losses in livestock industry, it remains as a neglected disease. The aim of this research work was to determine the clinical prevalence of myiasis in domestic animals and identification of bacteria from maggot wound during the period from May, 2017 to April, 2018. This study was conducted in Upazila Livestock Office, Sadar Dinajpur, in Dinajpur district of Bangladesh. During the study period overall 4149 cases were observed in cattle, goat and sheep of which 312 animals were affected with myiasis. For the prevalence study of the disease history, epidemiological data based on sex, age and season with clinical signs were recorded. For the isolation and identification of bacteria, 18 samples were collected randomly from the myiatic wounds and transported aseptically to the lab of microbiology in HSTU, Dinajpur. The overall prevalence of myiasis was found 7.52% in ruminants. Individually the prevalence of myiasis in cattle 11.67% (n=187), goat 5.01% (n=122) and sheep 2.68% (n=3) were recorded in this study. The occurrence of myiasis was significantly higher in female animal (22.39%) then the male (14.92%). Young animals (98%) in cattle were mostly affected with myiasis than adult (12%), in unlike goats where prevalence was higher in the adult group (34.43%) than the young (18.03%) (p<0.05). There was statistically significant seasonal variation found in the occurrences of myiasis. Seasonal prevalence was explored highest in summer (42.62%) followed by rainy (15%) and winter (2.92%). In case of sheep the occurrences of myiasis according to sex, age and season were found insignificant. Bacteriological examination of samples in this 6 study reported that Staphylococcus spp. (72.22%) was main pathological agents followed by Escherichia coli (11.11%), E. coli + Klebsiella spp. (11.11%) and Klebsiella spp. (5.56%) concurrently present. These findings could create awareness in veterinarians as well as animal owners which help to control this disease and prevent the severe economic losses in leather industry as well as our national economy. Additional widespread studies are suggested to investigate the prevalence and incidence of animal myiasis in other parts of the country to clarify the spread of infestation in the country.