Experimental infection of pigs and cattle with eggs of Asian <i>Taenia saginata</i> with special reference to its extrahepatic viscerotropism

, Eom, K S; , Rim, H J; , Geerts, S

doi:1992.30.4.269

Korean J Parasito > Volume 30(4):1992 > Article

Original Article


Korean J Parasitol. 1992 Dec;30(4):269-275. English. Published online Mar 20, 1994. http://dx.doi.org/10.3347/kjp.1992.30.4.269
Copyright © 1992 by The Korean Society for Parasitology


Experimental infection of pigs and cattle with eggs of Asian Taenia saginata with special reference to its extrahepatic viscerotropism
K S Eom,H J Rim,^ and S Geerts^*
Department of Parasitology, College of Medicine, Chungbuk National University, Chongju 360-763, Korea.


Abstract
Asian Taenia saginata, tentatively called Taenia saginata taiwanensis, has been described to be infected in its metacestode stage only in the liver of intermediate host animals. Experimentally, however, we found that the metacestodes of the Asian Taenia saginata are also infected in other viscera than the liver of pigs (Landrace-Duroc-Hampshire) 4 days to 4 months postinoculation (PI). Viscerotropism of cysticercosis was apparent because a majority (70.7%) of the non-calcified cysticerci were found in the livers while a minority were found in extrahepatic organs such as the omentum (19.2%), lungs (8.1%) and serosa of colon (2.0%). When experimentally infected to cattle, Asian T. saginata cysticerci were also observed calcified in the livers. On the other hand, classical Taenia saginata metacestodes infected the muscles and viscera of the Holstein-Friesian cattle whereas no infection was observed in experimental pigs. Extrahepatic metacestodes of Asian T. saginata, which were obtained from an experimental pig were confirmed to be infective to a male volunteer. This extrahepatic viscerotropism of Asian T. saginata metacestodes in experimental pigs explains well the transmission modes of Asian T. saginata among people considering the eating habits.

Figures


	Fig. 1 Asian Taenia saginata metacestode collected from the serosa of colon in pigs (carmine stained, scale : one mm).


	Figs. 2-5 Asian Taenia saginata metacestodes observed in various visceral organs such as the liver (Fig. 2), the omentum (Fig. 3), the lung (Fig. 4) and the serosa of colon (Fig. 5) of Pings (scales in mm).

Tables


	Table 1 Hepatic and extrahepatic destribution of Asian Taenia saginata metacestodes according to size of the host tissue capsules in 8 experimental pigs (microscopically examined only)


	Table 2 Infected organs of Asian T. saginata and classical Asian T. saginata metacestodes in pigs and calves

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