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Published on Mar 17, 2016
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PRESENTATION OUTLINE
HISTORY OF DISCOVERY
Tapeworm infections have been recorded in history from 1500 B.C. and have been recognized as one of the earliest human parasites. Taenia saginata was differentiated from Taenia solium infection by the late 1700s. However, the exact life cycle of T. saginata was discovered around 1863 when the cattle was identified as the immediate host.
Life Cycle
The life cycle begins with the ingestion of raw or undercooked beef containing T. saginata larvae. The larvae gets digested out of the beef in the human intestinal system.
The worm then attaches on the intestinal mucosa of the upper small intestine. The tapeworm will digest food and grow longer.
Mature tapeworms will release 10 single gravid proglottids daily via the feces or will spontaneous be released from the anus.
The worm then attaches on the intestinal mucosa of the upper small intestine. The tapeworm will digest food and grow longer.
Mature tapeworms will release 10 single gravid proglottids daily via the feces or will spontaneous be released from the anus.
Unique Structures
At the anterior end of the tapeworm is a knob-shaped organ called the scolex, which has hooks and suckers that enable the worm to attach to its host.
As the tapeworm grows, it adds proglottids just behind the neck pushing the older ones toward the rear.
A single tape-worm may have 2,000 proglottids and exceed 10m (33ft) in length
As the tapeworm grows, it adds proglottids just behind the neck pushing the older ones toward the rear.
A single tape-worm may have 2,000 proglottids and exceed 10m (33ft) in length
CHARACTERISTICS
The excretory system and nervous system are similar to this of flatworms. However, tapeworms lack eyespots and other light sensitive structures, and they have no mouth, gastrovascular cavity, or other digestive organs.
Photo by kat m research
SYMPTOMS
For humans in good health, there are few serious symptoms associated with tapeworm infection. Patients have had diarrhea, constipation, flatulence, hunger pain, weight loss, and appendicitis. The most common complaint has been the embarrassment and discomfort of the proglottids crawling out of the rear.
MANAGEMENT
Taenia Saginataare treated with oral medication, usually in a single dose of the drug niclosamide. Therapy is usually very successful and most cases are completely eradicated. However, if the proglottids reappear, retreatment is administered.
Photo by jrmyst
INTERMEDIATE & DEFINITIVE HOSTS
Cattle acquire the embryonated eggs, when they eat contaminated food, therefore making them the intermediate hosts. Humans contract it by eating raw or undercooked meat, therefore making them the definitive host.
COMMONLY OCCURS IN...
Now, Taeniasis has a world wide distribution because it is found where beef is eaten and in places of poor sanitation. This would include the United States as a possible area to have infestation. Public Health laws have been passed that requires all meat to be inspected before it is allowed to be used for human consumption. The grazing of cattle is also checked routinely of marketed cattle to make sure that they are not eating in contaminated areas. Also, to prevent vegetation contamination, the disposal of human fecal matter must be dealt with properly.
Photo by archiemcphee
