Comparing the Bacterial Flora of Insectary and Filed Strains of (Blattaria: Ectobiidae) and Their Antibiotic Resistant Pattern in Qom Province, Central Iran.

BACKGROUND

Cockroaches play a role in the mechanical transmission of microbial pathogens. This study was designed to determine the isolated bacteria and their susceptibility to conventional antibiotics from brown-banded cockroach, in Qom province, central Iran.

METHODS

In this cross-sectional study, brown-banded cockroaches were bred in an insectary and caught from hospitals of Qom. The samples were taken from the surface and alimentary canal and then cultured on microbial culture media; next, grown specimens were identified using differential culture media. Finally, after performing diagnostic tests and identifying the bacteria species, their susceptibility to various antibiotics was evaluated.

RESULTS

A total of 120 adult cockroaches from the insectary and hospitals were included in the study. Ten bacterial genera were found; nine were Gram-negative and one was Gram-positive. The genus , , , and were isolated only from the hospital strain. On the other hand, and from both groups and other species such as , and were isolated only from laboratory strains. The highest antibiotic resistance among Gram-positive cocci and Gram-negative bacilli were 100.0% and 98.1% for ampicillin and Ceftazidime, respectively.

CONCLUSION

The results of this study showed that various pathogenic bacteria harbored by brown-banded cockroaches. Moreover, it was found that most of these bacteria belong to the family, which can be pathogenic and thus threaten human health.