Summary
In Trichogaster chuna (Ham.) the cysts of a newly reported species, Pallisentis basiri Farooqi (1958) have been recorded in the liver. No infection was seen in the alimentary canal of the fish. The cysts in the liver, which could be distinguished by the naked eye measure 0.5 to 1.5 mm in diameter and contain mature worms. — By the nature of the food of the fish which consists of cyclops and daphnids, it appears that the infection reaches through the agency of one of these organisms. — The encysted nature of the worms in the liver of T. chuna and the total absence of free stages from other organs, raises another possibility. The fish might be acting simply as a “reservoir host”. Parasitic adaptations of this kind have been referred to earlier in the Acanthocephala and in such cases the worm requires another “definitive host” to complete the rest of its life cycle.
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Hasan, R., Qasim, S.Z. The occurrence of Pallisentis Basiri farooqi (acanthocephala) in the liver of Trichogaster Chuna (Ham.). Z. F. Parasitenkunde 20, 152–156 (1960). https://doi.org/10.1007/BF00260207
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DOI: https://doi.org/10.1007/BF00260207