alexa A Recent Evaluation of the Sandfly, Phlepotomus Papatas
ISSN: 2329-8731

Journal of Infectious Diseases & Preventive Medicine
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Research Article

A Recent Evaluation of the Sandfly, Phlepotomus Papatasi Midgut Symbiotic Bacteria Effect on the Survivorship of Leshmania Major

Mostafa I Hassan1*, Bahera M Al-Sawaf1, Mohamad A Fouda1, Shaaban Al-Hosry2 and Kotb M Hammad3

1Department of Zoology and Entomology, Faculty of Science, Al-Azhar University, Nasr City, Cairo, Egypt

2Department of Entomology- Faculty of Science Ain-Shams University, Cairo, Egypt

3Department of Vector Biology, NMRU-3, Cairo, Egypt

*Corresponding Author:
Mostafa I Hassan
Department of Zoology and Entomology
Faculty of Science, Al-Azhar University
Nasr City, Cairo, Egypt
Tel: +201223840969
Fax: +222629356
E-mail: [email protected]

Received March 17, 2014; Accepted April 28, 2014; Published April 30, 2014

Citation: Hassan MI, Al-Sawaf BM, Fouda MA, Al-Hosry S, Hammad KM (2014) A Recent Evaluation of the Sandfly, Phlepotomus Papatasi Midgut Symbiotic Bacteria Effect on the Survivorship of Leshmania Major. J Anc Dis Prev Rem 2:110. doi: 10.4172/2329-8731.1000110

Copyright: © 2014 Hassan MI, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.



Like most entomophagus insects, the sandfly, Phlebotomus papatasi harbor both Gram-negative and Grampositive bacteria in her midgut. The biological interactions between these bacteria and Leishmania parasites they transmit are not fully understood. In an effort to declare these interactions, the present study has been carried out. A total of six bacterial species were identified from the midgut of the sandfly, Phlebotomus papatasi. These species were; Alcaligenes faecalis, Haemophillus parainfluenzae, Shigella sonnei, Serratia liquefaciens (Gram-negative bacteria); Listeria seeligeri and Bacillus thuringiensis (Gram-positive bacteria). The in vitro effect of each isolated midgut bacteria species on the survivorship of L. major (promastigotes) was investigated. Results indicated that the most effective bacterial species was B. thuringiensis followed by H. parainfluenzae (at all concentrations used), where they caused 100% mortality of Leishmania promastigotes. In addition, the present study dealt with the interactions between the midgut bacteria and Leishmania parasites in P. papatasi. The results indicated that the aposymbiotic sandflies (with midgut-free bacteria) were more susceptible to the infection with L. major (81.25 % vs. 23.3%) than symbiotic ones (with midgut bacteria). This result may indicate that midgut bacteria play a very important role in inhibiting the development of Leishmania parasites, thus preventing the sandfly, Phlepotomus paptasi from transmitting Leishmania major to her hosts.


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