Tan-awa ang tapeworm sulod sa tijan...
Intestinal Tapeworms
Among the oldest known parasites is the tapeworm. They vary in size, from 6 inches to 26 feet long depending on the type of tapeworm infection. Described as flat and ribbon-like, tapeworms have three parts to their bodies: head, neck and body segments called proglottids.
The head has hooks that allow it to attach itself to the intestinal walls. As long as the head remains attached to the intestinal mucosa, it can survive and develop a new tapeworm. The proglottids contain eggs that can break off and travel throughout the body.
Tapeworms do not have intestinal tracts: they absorb partially digested substances from their host through their skin. Adult tapeworms can live in the digestive tracts of a variety of hosts such as humans, pigs, cows, dogs, cats and fish. Most tapeworms have both male and female reproductive organs, and reproduce and fertilize their own eggs.
Common Tapeworms
In North America the beef tapeworm (taenia saginata) is most common, although it is relatively well controlled. In Latin America the pork tapeworm (taenia solium) infects millions. The fish tapeworm (diphyllobothrium latum) and pork tapeworm are common in Asia.
Once a tapeworm is born, it plays a sinister role. Eggs develop quickly into adventurous embryos. They leave the host's digestive system through bowel movements and then find the nearest water supply. Both animals and humans ingest baby tapeworms regularly.
The tapeworms' embryos are ingested either by drinking contaminated water or through direct contact with feces (another good reason to always wash your hands after using the toilet). For people infected with tapeworms, the embryo stage is when the parasite poses the most danger; it can develop into an insidious infection known as cysticercosis.
Estimates are that cysticercosis affects up to 50 million people worldwide, but most cases go unnoticed. Cysts are not typically noticed until an autopsy is performed. In a minority of cases, the tapeworms infect the central nervous system causing a potentially deadly condition called neurocysticercosis. Signs of neurocysticercosis are neurological damage and seizures.
Tapeworm Assumptions
It's an easy assumption that embryos develop into fully grown tapeworms, but they typically do not. The undeveloped tapeworms drill through their host's abdominal lining and dive into the blood stream. Veins and arteries act as highways directing and transporting the tapeworms to any and all major organs and muscles.
Once the embryo finds its home – in a large muscle or the liver – it encloses itself into a fluid sac called a cyst. The embryo doesn't leave the sac until the flesh of its host (a cow for example) is eaten by another animal (you, for instance). In fact, this is most often how people contract tapeworms.
If you have a tapeworm in your stomach or gut, odds are you won't even know it. If you do experience signs, they'll barely be noticeable and will more than likely be misdiagnosed and attributed to stress, irritable bowel syndrome (IBS), upset stomach or some other common ailment. In fact, the only time people seem to realize they have a tapeworm is, after defecation, upon noticing the headless worm bodies in their stool.www.puristat.comLinkback:
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Topic: Beware: you can have tapeworms and not know it! (Read 14434 times)