Transcript Document

Raxsina
1*
Polseela ,
Apichat
1
Vitta ,
and Chamnarn Apiwathanasorn
2
1Department
of Microbiology and Parasitology, Faculty of Medical Science, Naresuan University, Phitsanulok, Thailand
2Department of Medical Entomology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand.
1*Corresponding
author: e-mail:[email protected],[email protected]
Sand flies (Diptera: Psychodidae: Phlebotominae) are considerable
public health importance in the tropics and subtropics. They are
obligate vectors of Leishmaniasis, a protozoan disease that affects
people in more than 80 countries.
The main objective was to investigate the species of the
phlebotomine sand fly inside and outside cave.
An investigation of the species of the phlebotomine sand fly was conducted
from August 2011 to August 2012. Sand flies were collected by CDC light traps
from inside and outside Chao Ram Cave, Sukhothai and collection 15 light traps
per month per locations.
Inside cave, a total of 13,750 sand flies were collected (11
species). The ratio between male and female sand flies was 1:1
(6,960:6,790). Outside cave, 2,378 sand flies were collected (12 species)
and ratio 1:1.76. The highest numbers of sand flies were found inside
cave. In this study, 14 species were identified by morphology as :
Phlebotomus argentipes, P. stantoni, P. teshi, P. philippinensis gouldi,
Sergentomyia barraudi, S. anodontis, S. dentata, S. perturbans, S.
iyengari , S. quatei, S. silvatica, S. gemmea, S. indica, and Chinius
barbazani , unidentification 4 species (a,b,c,d)
The highest peak of sand flies found in April (inside cave) and June
(outside cave).
P. argentipes
C. barbazani
Vector
Inside cave:
(important)
P. argentipes
(3.95%)
Maximum
Inside cave
Figure 1 Shape of cibarium and spermatheca of sand flies
Maximum
Outside cave
S. anodontis
(47.19%)
S. silvatica
(44.69%)
Thank you to Head of Tham Chaoram Wildlife
Sanctuary, Sukhothai and staff, sand flies and
insects. This study was financial supported from
The Higher Education Research Promotion
Congress and Naresuan University.
The sandflies of the study area include species previously
found in Thailand. The sand fly, P. argentipes was found only
inside cave , which is important because it is believed to be the
Leishmania spp. vector. The most predominant female sandflies
was S. silvatica (outside cave) and S. anodontis (inside cave).
This suggests that phlebotomine sand flies show nocturnal flight
activity. The population dynamic of sandflies in Chao Ram cave
was greatly affected by several enviromental conditions such as
temperature, humidity, rainfall and
wind velocity. The
widespread distribution of sand flies may be an indicator of the
epidemiologic importance of the vector sand flies in this habitat.
Apiwathanasorn,C., Sucharit,S., Rongriyam,Y.,et al.(1989). A brief survey of
Phlebotominae sand flies in Thailand. Southest Asian J Trop Med Public Hlth.20:429-431.
Fahmy, AR., et al.,(2009). Preliminary field investigations on Phlebotomine sand flies
(Diptera: Psychodidae) from a recent cutaneous leishmaniasis focus in Northern-Sinai,
Egypt .Egypt. Acad. J. biolog. Sci., 2(1): 9 – 15.