Korean J Parasitol.  2014 Feb;52(1):111-115. 10.3347/kjp.2014.52.1.111.

Effects of Some Pesticides on Development of Ascaris suum Eggs

• Yu YM
• Kim JW
• Na WS
• Youn YN
• Choi IW
• Lee YH

• KMID: 1715682
• DOI: http://doi.org/10.3347/kjp.2014.52.1.111

Abstract

To evaluate the effects of pesticides to parasite eggs, Ascaris suum eggs were incubated with 5 different pesticides (1:1,500-1:2,000 dilutions of 2% emamectin benzoate, 5% spinetoram, 5% indoxacarb, 1% deltamethrin, and 5% flufenoxuron; all v/v) at 20degrees C for 6 weeks, and microscopically evaluated the egg survival and development on a weekly basis. The survival rate of A. suum eggs incubated in normal saline (control eggs) was 90+/-3% at 6 weeks. However, the survival rates of eggs treated with pesticides were 75-85% at this time, thus significantly lower than the control value. Larval development in control eggs commenced at 3 weeks, and 73+/-3% of eggs had internal larvae at 6 weeks. Larvae were evident in pesticide-treated eggs at 3-4 weeks, and the proportions of eggs carrying larvae at 6 weeks (36+/-3%-54+/-3%) were significantly lower than that of the control group. Thus, pesticides tested at levels similar to those used in agricultural practices exhibited low-level ovicidal activity and delayed embryogenesis of A. suum eggs, although some differences were evident among the tested pesticides.

Keyword

Ascaris suum; egg; pesticide; larval development; embryogenesis

MeSH Terms

Animals
Ascaris suum/*drug effects/growth & development
Female
Larva/drug effects/growth & development
Microscopy
Pesticides/*pharmacology
Survival Analysis
Temperature
Time
Zygote/*drug effects/growth & development
Pesticides