Growth and development of Pygidiopsis summa in rats and mice with a supplementary note on its morphological characters.
- Author:
Jong Yil CHAI
1
;
Byong Seol SEO
;
Soon Hyung LEE
;
Sung Tae HONG
Author Information
- Publication Type:Original Article
- MeSH: parasitology-helminth-trematoda; Pygidiopsis summa; morphology; development; rat
- From:The Korean Journal of Parasitology 1986;24(1):55-62
- CountryRepublic of Korea
- Language:English
- Abstract: The growth and development of Pygidiopsis summa were studied in experimental rats and mice, and a special reference was given to its morphological characters differed from the type species, P. genata. The metacercariae were obtained from young mullets (Mugil sp.), and total 21 rats and mice infected each with 1,000 metacercariae. Worms of various ages of infection, from 3 to 28 days, were subjected to a microscopic observation. The worms grew rapidly and remarkably in size up to 10 days of infection, to become 0.53-0.82 mm long and 0.31-0.39 mm wide, but nearly stopped the growth thereafter. Their genital organs developed more rapidly and fully matured within 3-5 days. At 3 days several eggs were found in uterus. The presence of two groups of small spines, 5-6 on the right and 7-9 on the left side of the genital apparatus, was a new finding in this study and considered a distinct character of P. summa. The morphology of ventral sucker and intestinal ceca was also different from P. genata. This study confirms the validity of the species, P. summa.
