Study of the Antagonistic Effect of Bacteria Isolated from the Left and Right Wings of Houseflies

Sixty houseflies (Musca domestica) were collected from the city of Hilla and from different locations (Al- Karama, Al-Akramin) between February and March 2025. The highest number of bacteria isolated from the fly's body was found at 5.60 ˟ 103 colonies/cm3, compared to 2.5 ˟ 103 and 3.42 ˟ 103, respectively, on the right and left wings. The following bacteria were isolated from the right wing: Staphylococcus aureus , Pseudomones aeruginosa , Proteus vulgaris , Escherichia coli , Shigella , Klebsiella , Alternaria alternata , Aspergillu’s fumigates. From the left wing, only three types of bacteria were isolated: Staphylococcus aureus, Pseudomonas aeruginosa, and Klebsiella. A type of yeast, Saccharomyces servishiae, was also isolated. The bacteria isolated from both wings (Pseudomonas aeruginosa) showed heterogeneous antimicrobial activity against isolates from the same wing and the opposite wing. Similarly, the two isolates belonging to Klebsiella and Shigella showed activity against most of the species studied.