TAILIEUCHUNG - Ebook Medical parasitology: Part 2

(BQ) Part 2 book "Medical parasitology" presents the following contents: Taeniasis and cyticercosis, hydatid disease, african trypanosomiasis, cutaneous leishmaniasis, pneumocystis pneumonia, clinically relevant arthropods, cryptosporidiosis,. Invite you to consult. | Section III Cestodes Chapter 20 Taeniasis and Cyticercosis Hannah Cummings Luis I. Terrazas and Abhay R. Satoskar Background Taeniasis and cysticercosis are diseases resulting from infection with parasitic tapeworms belonging to Taenia species. Approximately 45 species of Taenia have been identified however the two most commonly responsible for human infection are the pork tapeworm Taenia solium and the beef tapeworm Taenia saginata. Parasitic tapeworm infections occur worldwide causing sickness malnutrition and often resulting in the death of their host. Infection with adult tapeworms of either T. solium or Tsaginata cause taeniasis in humans. The metacestode or larval stage of Taenia solium causes the tissue infection cysticercosis. Clinical manifestations associated with the tapeworm infection can vary greatly and may range from mild forms where patients exhibit little to no symptoms to severe life-threatening forms which are often fatal. Geographic Distribution and Transmission Taenia infections are estimated to affect 100 million people worldwide with major endemic areas located primarily in the developing countries of South America Africa India China and Southeast Asia. The ingestion of cysticerci from raw or undercooked meat facilitates the transmission of T. solium from pigs to humans and is presumably responsible for the high prevalence of human cysticerosis in these regions. It is estimated that anywhere between 5-40 of individuals carrying the adult tapeworm will develop cysticercosis. Taenia infections are less common in North America however neurocysticercosis has been recognized as an important health problem in California. Although this disease is mainly seen in migrant workers from Latin American it has also been reported in US residents who have not traveled to endemic countries. Life-Cycle The complete life-cycle of Taenia solium involves two hosts the pig and the human whereas that of Taenia saginata involves the cow and the human Fig. . .

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