Effect of Temperature on Embryonation of Ascaris suum Eggs in an Environmental Chamber.
10.3347/kjp.2012.50.3.239
- Author:
Min Ki KIM
1
;
Kyoung Ho PYO
;
Young Sang HWANG
;
Ki Hwan PARK
;
In Gyun HWANG
;
Jong Yil CHAI
;
Eun Hee SHIN
Author Information
1. Department of Parasitology and Tropical Medicine, Seoul National University College of Medicine, and Institute of Endemic Diseases, Seoul National University Medical Research Center, Seoul 110-799, Korea. ehshin@snu.ac.kr
- Publication Type:Brief Communication ; Research Support, Non-U.S. Gov't
- Keywords:
Ascaris suum;
environmental chamber;
helminth;
temperature;
humidity;
embryonation
- MeSH:
Animals;
Ascaris suum/*embryology/growth & development/*radiation effects;
Culture Media;
Eggs/radiation effects;
Humidity;
Larva/growth & development/radiation effects;
Silicon Dioxide;
Temperature
- From:The Korean Journal of Parasitology
2012;50(3):239-242
- CountryRepublic of Korea
- Language:English
-
Abstract:
The influence of temperature on the development and embryonation of Ascaris suum eggs was studied using coarse sand medium in an environmental chamber with 50% humidity. The time required for development and embryonation of eggs was examined under 3 different temperature conditions, 5degrees C, 25degrees C, and 35degrees C. A. suum eggs did not develop over 1 month at the temperature of 5degrees C. However, other temperature conditions, 25degrees C and 35degrees C, induced egg development to the 8-cell-stage at days 5-6 after incubation. All eggs examined developed to the 8-cell stage at day 6 after incubation in the sand medium at 25degrees C. The higher temperature, 35degrees C, slightly accelerated the A. suum egg development compared to 25degrees C, and the development to the 8-cell stage occurred within day 5 after incubation. The formation of larvae in A. suum eggs at temperatures of 35degrees C and 25degrees C appeared at days 17 and 19 after incubation, respectively. These findings show that 35degrees C condition shortens the time for the development of A. suum eggs to the 8-cell-stage in comparison to 25degrees C, and suggest the possibility of accelerated transmission of this parasite, resulting from global warming and ecosystem changes.
