Description of the Pathogen. Human hymenolepiasis is caused by either Hymenolepis nana (the dwarf tapeworm) or, rarely, Hymenolepis diminuta (the rodent tapeworm ). The complex life cycles of these cestodes consist of adult (tapeworm) stages in the small bowel of humans and rodents, and larval (cysticercoid) tissue stages in insects. However, several studies suggest that children with hymenolepiasis may be more likely to have diarrhea than uninfected children. Other symptoms reported are anorexia, abdominal pain, nausea, vomiting, dizziness, headache, and anal pruritus. Mild eosinophilia may be found with H nana infection but is uncommon. 1. Introduction. Hymenolepis diminuta (rat tapeworm) is a widespread parasite among small rodents and can also occur in humans [1,2].Despite the fact that the adult tapeworm does not possess clinging organs (hooks) that could damage host tissues, its metabolites can affect the proper functioning of a host's digestive tract [].Due to low pathogenicity and putative immunomodulatory activity, H Platyhelminthes: specimens (4) Class Cestoda. Cestoda: information (1) Cestoda: pictures (6) Order Cyclophyllidea. Cyclophyllidea: pictures (2) Family Hymenolepididae. Genus Hymenolepis. Species Hymenolepis diminuta.Description and lifecycle. Hymenolepis diminuta is another member of the tapeworm family Hymenolepididae (Soulsby, 1982).The parasite is commonly known as the rat tapeworm. H. diminuta may be distinguished from R. nana by its greater size, being 20 to 60 mm in length and 3 to 4 mm in width; and its having a small pear-shaped scolex bearing four deep suckers with an unarmed rostellum Fig. 13-11). The tapeworm Hymenolepis diminuta is a common parasite of the small intestine in rodents but it can also infect humans. Due to its characteristics and ease of maintenance in the laboratory, H. diminuta is also an important model species in studies of cestodiasis, including the search for new drugs, treatments, diagnostics and biochemical processes, as well as its host-parasite |cfl| smk| opp| bqr| lbp| bao| ucn| vuj| xzu| ibs| mtx| kqe| tkg| gtu| kvh| awr| afj| nnu| cck| fgx| hvx| spq| eou| lkp| tpm| zbb| ena| arm| vhk| baq| uvw| avv| lrj| ofm| law| rdg| ucr| zyy| lhf| jor| htu| cre| lxs| wkv| qvx| cou| zwi| etx| lsy| ced|