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Entries - Entry Category: Pathology - Starting with C


aka: Tapeworms
Cestodes (tapeworms) include flatworms belonging to the phylum Platyhelminthes, class Cestoidea, subclasses Cestodaria (two orders) and Eucestoda (sixteen orders), and about fifty-nine families. The subclass Cestodaria includes monozoic (unsegmented) tapeworms containing only a single set of male and female reproductive organs; these are parasitic in the intestinal tract and body cavity of fishes and turtles. The subclass Eucestoda is made up of polyzoic (segmented) or monozoic cestodes of varying structure and parasitic in the intestines of vertebrates. To date, there are more than 5,000 described species that, as endoparasites, infect all vertebrate classes. The classification of tapeworms remains ambiguous using classical morphological studies alone, and, although some studies have been done recently using molecular tools, further attention is needed to …


Cholera, a deadly, infectious gastrointestinal disease that usually spreads through contaminated water, is an acute infection of the small intestine caused by the toxin released by the Vibrio cholerae bacteria, leading to severe diarrhea and dehydration. Left untreated, cholera can be fatal in a matter of hours. The first cholera pandemic of 1817–1823 spread from India to Southeast Asia, Central Asia, the Middle East, Russia, and Europe, especially England. Cholera was prevalent in the 1800s in America beginning in New York City. Due to increased traveling, the use of steamboats, and more navigable waterways, cholera made its way to the Mississippi Delta region. In October 1832, cholera reached Arkansas. An infected passenger boarded the steamboat Volant, captained by Charles Kelley. …


Coccidians are microorganisms belonging to the Phylum Apicomplexa and Suborder Eimeriorina, which includes eight to thirteen families, about 39 genera, and well over 2,000 species. These protists are intracellular (meaning they function inside the cell) parasites of medical and veterinary importance, including those in the genera Caryospora, Cryptosporidium, Cyclospora, Eimeria, Isospora, Sarcocystis, and Toxoplasma. Most are considered intestinal parasites that infect both invertebrates as well those animals in all vertebrate classes. These parasites cannot complete their life cycle without exploiting a host. Coccidiosis is a general term for the disease they can cause, and it is recognized as a major health concern in wild animal populations, domestic animals, and zoo animals. However, some infections appear not to cause any pathology …