Prevalence of cutaneous myiasis along with secondary bacterial complications in ruminants


Myiasis is a common and widespread clinical problem closely interlinked with serious economic losses of livestock in Bangladesh, though it is thought to be a neglected cutaneous infection. The study was carried out to determine the clinical prevalence of myiasis in cattle, sheep and goat based on different epidemiological parameters such as species, sex, age and season with special emphasis to identify the secondary bacterial complications in maggot wounded areas. The swabs were randomly collected from the myiatic wounds, brought to Microbiological laboratory with necessary cautions followed by bacteriological cultivation, isolation, and identification. The data were recorded and organized systematically and analyzed statistically. A total number of 4149 clinical cases were recorded, where 312 cases were registered as myiasis irrespective of species. The overall prevalence of myiasis was found at 7.52%. Higher prevalence of myiasis were noticed in cattle (11.67%) (n=187) followed by goat (5.01%) (n=122) and sheep (2.68%) (n=3) that differed significantly (P<0.05). Myiasis showed higher in female animals (22.39%) than in males (14.92%), and young animals (52.41%) were predominantly susceptible than adults (6.42%) in cattle and goats whereas the opposite scenario was seen in sheep. Seasonally the highest clinical cases were found in summer (42.62%) followed by rainy (15.00%) and winter season (2.92%) which demonstrated statistically significant (P<0.05) in cattle and goat but insignificant (P>0.05) in case of sheep. In myiatic wound, the bacterial complications were higher with Staphylococcal spp infection (72.22%) followed by Escherichia coli (11.11%). Combined infection of E. coli and Klebsiella spp. was 11.11%, whereas single Klebsiella infection was 5.56%.

Key Words: Bacteria, myiasis, prevalence, ruminants.