Frequency (Occurrence) and seasonal variation of bacterial species on the external surface of non biting flies in Egypt
The feeding and reproductive habits of non biting synathropic flies such as house flies and blow flies make them important mechanical vectors of pathogenic bacteria to human. The aim of this study was to isolate and identify bacteria found in natural association with adults of Musac domestica, Chrysomya albiceps, Sarcophaga carnaria and Lucilia sericata collected from different habitats (garbage and carrion) in different seasons of the year. The results indicated that 8 bacterial species were isolated from the external surface of M. domestica collected from carrion, while 7 bacterial species were isolated from flies collected from garbage: 5 bacterial species were found in autumn 2014, 4 bacterial species were found in winter season, 2015, 3 species were found in spring2015 and 4 species were found in summer 2015. Most of bacteria species isolated from the external surface of C. albiceps were found on flies collected from carrion; 2 4 3 and 2 bacterial species were found on flies tested in autumn 2014, winter, spring and summer 2015; respectively. The bacteria species; Staphylococcus lentus and Staphylococcus sciuri had the highest frequency on the flies tested. Four different bacterial species were identified on the external body surface of S. carnaria in autumn 2014; the most frequent bacteria species isolated were Staphylococcus spp. Three different bacterial species were identified on the external body surface of L. sericata in autumn 2014; the most frequent bacteria species was Staphylococcus spp.