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The effects of common salt on Aedes togoi and filarial infection
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Original Article
Korean J Parasitol. 1982 Jun;20(1):21-27. English.
Published online Mar 20, 1994.  http://dx.doi.org/10.3347/kjp.1982.20.1.21
Copyright © 1982 by The Korean Society for Parasitology
The effects of common salt on Aedes togoi and filarial infection
Supat Sucharit,Sumran Vutikes,Somjai Leemingswasdi,Vanida Kerdpibul and Yaovamarn Chomcharn
Department of Medical Entomology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand.
Abstract

The effects of salt on the development of Aedes togoi and the infecton of Brugia pahangi were studied. Salt concentrations over 7.2% completely got rid of pupae and adults. The salt concentrations 0% to 3.6% reduced pupal development from 86.6% to 72.8% and adult from 70.3% to 53.3%. B. pahangi infestations and infection rates were also reduced in the mosquitoes reared at salt concentrations of 1.8% and 3.6%. Trends of retardation in the filarial development were observed when the salt concentrations were increased.

Figures


Fig. 1
Daily production of A. togoi pupae from 1,500 larvae reared in 0%~3.6% salt.

Tables


Table 1
Numbers of pupa of Aedes togoi emerged daily from 500 larvae reared in various concentrations of salt


Table 2
Numbers and percentages of pupa and adult of Aedes togoi recovered from 500 larvae reared in various salt concentrations


Table 3
Infection rates of B. pahangi in A. togoi when the mosquito larvae were reared in water of various salt concentrations and fed on 478 microfilariae per 20 µl


Table 4
Numbers and percentages of A. togoi reared in various concentrations of salt harbouring various numbers of B. pahangi larva when infected with 478 microfilariae per 20 µl


Table 5
Cumulative numbers of pupa developed from 1,500 larvae of Aedes togoi reared in various salt concentrations.


Table 6
Body length and width of B. pahangi larvae from A. togoi reared in various concentrations of salt (20 larvae in each measurement)

References
1. Benez LFL. Philippine Journal of Science 1964;93:447–481.
2. Ramachandran CP, et al. Annal of Tropical Medicine and Parasitology 1963;54:443.
3. Ramalingam S. New record of Aedes (finlaya) togoi (theobold) in West Malaysia. Med J Malaya 1969;23(4):288–292.
 
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