Evaluation of bacterial infection of external surface and digestive system of cockroach species


Monireh Mahjoob 1 , * , Jalil Nejati 2 , Amir Keyhani 3

1 Instructor Department of Optometry, Zahedan University of Medical Sciences, Zahedan, Iran.

2 Entomologist, Zahedan University of Medical Sciences, Zahedan, Iran.

3 Entomologist, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.

How to Cite: Mahjoob M, Nejati J, Keyhani A. Evaluation of bacterial infection of external surface and digestive system of cockroach species, Hormozgan Med J. 2010 ; 14(1):e88540.


Hormozgan Medical Journal: 14 (1); e88540
Published Online: January 31, 2010
Article Type: Research Article
Received: May 12, 2009
Accepted: January 31, 2010


Introduction: The presence of cockroaches has health implications, such as
nosocomial infection, as the insects move freely from areas within and around
hospitals that may harbor pathogenic organisms. The aims of the present study were
to detect cockroach species and bacterial infection transmitted by their surface and
their digestive system.
Methods: In this study we caught 250 cockroach from hospital of Hamedan. We
hunt them with hand, glass trap and sticky trap. Then they have been carried to
bacteriology lab. After anesthesia and washing in 2cc physiology serum, their gut
have been expelled from oral to anal and cultured. In this study we used
E.M.B,T.S.I, DNAase, B.A, SF,SS, ONPG, MR, SIM, Mnitol sult agar, Lysin,
Simmon citrate and Urea as bacterial culture methods.
Results: In this study we recognized 4 species of cockroaches from hospitals of
Hamedan: Periplaneta americana, Periplaneta australasiae, Blatta orientalis Blatella
germanica. The most frequent one was Periplaneta americana, (88%) and just 0.8% were
Blatta orientalis (the least frequency). 23 species of bacteria recognized from surface and
digestive system or cockroaches. In surface of them, Escherichia coli had 26.5%(the most
frequency) and Edward siella had 0.4% (the least frequency). In digestive system E.coli
had 30.8% (the most frequency) and Morganella morgani had 0.8% (the least percent).
Conclusion: Tour study determined that cockroaches play as potential vectors of
medically important microorganisms such as pathogenic bacteria in hospital
environments. Integrated management of cockroach populations should be carried
out into the disease prevention and control programs in hospitals.



  • 1.

    References are included in the PDF.

  • © 2010, Hormozgan Medical Journal. This is an open-access article distributed under the terms of the Creative Commons Attribution-NonCommercial 4.0 International License (http://creativecommons.org/licenses/by-nc/4.0/) which permits copy and redistribute the material just in noncommercial usages, provided the original work is properly cited.