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brain worms

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  • brain worms

    hello everybody,ramadan mubarak... my subject is about some worms that can invade the brain

    Taenia solium , Naegleria fowleri

    Taenia solium
    The pork tapeworm is one of the most common disease-causing brain
    parasites. is the leading cause of brain seizures. It is usually contracted from eating undercooked pork, and once in the gut, it attaches to the intestine, and then grows to be several feet long. Under certain circumstances, these worms can also invade the brain,.
    In its larval stage, the worm will hook onto the intestine; however, if eggs are swallowed, they hatch in the stomach. From there the larvae can enter the bloodstream and eventually travel to the brain. Many scientists think that the larvae can release enzymes that are able to dissolve a small portion of the blood-brain barrier to allow the parasite to get through into the brain.
    in brain it causes neurocysticercosis.Once attached, the larvae develop into cyst-like structure.

    Naegleria fowleri
    N. fowleri has only infected about 175 people in the world, causing a disease called primary amoebic meningo-cephalitis. But out of those 175 people, only six have survived, giving a mortality rate of 97 percent. .

    It lives mostly in warm freshwater lakes and ponds, but can even live in heated swimming pools. Furthermore, N. fowleri is actually a free-living organism, which means that it can survive without a host. This explains why N. fowleri attacks are so rapidly fatal—since hosts are not necessary to its survival,

    invasion:
    the amoeba attaches to the inside of its host’s nose ----> travels up the nose ------>brain. The amoeba follows the path laid out by the olfactory nerve. Several enzymes released by the amoeba are able to dissolve the host’s tissues, giving access to the brain. Once in the brain, the amoeba causes damage by actually eating the nerve cells. As you can imagine, this is very harmful to the host, and is the main reason why infection by N. fowleri causes such rapid death
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