00:00Hello. Thank you for watching today.
00:15Today's topic is the top 10 most dangerous parasites.
00:21Now, let's move on to number 10.
00:26Coming in at number 10 is Forlanegurria.
00:29These parasites are called zombies and they survive by eating brains.
00:35They usually live in freshwater at around 30 degrees Celsius, and in humans, they enter the ear or other parts of the body while swimming, then enter the brain and attack the nerves.
00:48As the central nervous system is attacked, the senses of smell and taste become numb, followed by severe nausea, vomiting, fever, headache, and other symptoms, rapidly leading to coma and death.
01:04That is why this parasite is also called murder and masterpiece.
01:10Fortunately, such fatal cases are rare worldwide, with only one fatal case occurring in Japan in 1996.
01:22In 9th place is Hizen tick.
01:29Once this parasite infects humans, it quickly causes a skin infection called thrombus.
01:38In other words, red inversions appear on the hands and feet, causing redness and swelling, while also causing intense itching.
01:47This means you keep scratching your skin until it bleeds.
01:53In severe cases, the mites can penetrate the hair follicles, causing intense pain.
02:02These symptoms can only be treated with medications such as antibiotics.
02:12In eighth place is Sparganum.
02:14This parasite likes to infest the human brain, where it can remain for up to 20 years.
02:26When it first infects the brain, it only causes a mild headache, but as it grows, it kills the host, that is, the person it has infected.
02:37Therefore, even if the victim is completely healthy for around 20 years after being infected, their brain will suddenly be eaten and they will die.
02:48This parasite is found mainly in Asia and is transmitted through water and meat.
03:00Number seven is underwater.
03:03In Japan, this parasite was commonly heard of several decades ago, but recently, there are fewer people who are infected with it.
03:12However, it is still a type of parasite that is feared in some areas.
03:21The tricky thing about this parasite is that even if you are infected, there are almost no symptoms, so it is difficult to detect.
03:30However, it is only when it penetrates deep into the body that it causes symptoms.
03:37Symptoms include headache, chills, nausea, and diarrhea.
03:45This parasite is more likely to infect children than adults, so care must be taken with children.
03:54In sixth place is Kandil.
03:57This parasite lives in the Amazon River in Brazil.
04:01This parasite usually infects fish and other animals, but it can also infect humans in an unexpected way.
04:11The way it does this is when a person urinates into a river, it detects the smell of ammonia and passes through the urine into the penis.
04:23It then passes through the urethra and further into the body, tearing flesh away.
04:29Some people cannot bear the intense pain and faint.
04:35Once inside the body, the only way to remove it is through surgery.
04:43In fifth place is the heartworm.
04:46It is also known as the elephant worm.
04:50This is because when infected with this parasite, parts of the human body become enlarged, like an elephant's.
05:00After entering the human body, they temporarily cease activity, and after a few years, they become adults and move around the body in search of lymph nodes, and if they find any, they stop or inhibit them.
05:15As a result, certain areas of the lymph nodes become abnormally enlarged due to fluid and toxins.
05:23In humans, enlargement of the feet is common.
05:28If it is too late, the affected area may have to be amputated.
05:34In fourth place is Botfly.
05:40Adult flies burrow into human skin and implant their larvae.
05:46By the time you notice it, it has often already penetrated deep into the infestation, in which case countless fly larvae will be wriggling about.
05:56And when the larvae start to eat the flesh, they make large holes in the skin.
06:01And what's even more disgusting is that you can vaguely feel the movement of the larvae in the hole through your skin.
06:12To remove them, infrarenal surgery is required, painstakingly removing them one by one from under the skin.
06:23In third place is Oncocerpa volvulus.
06:26This parasite is causing blindness in many people in developing countries.
06:33The host is primarily humans, and the time it takes for symptoms to appear, from infection to blindness, is extremely short.
06:44It often spreads when you get wet with skin, and once infected, the cornea of the eye quickly begins to harden.
06:53In other words, by the time you notice that your vision is becoming a little difficult, the insects have already invaded.
07:02What's worse, the human immune system is unable to recognize this parasite as a foreign enemy, allowing infection to easily occur.
07:14In second place is the Guinea worm.
07:19It is found mainly in Africa and enters the body through polluted water.
07:25Also, if you swallow the parasite along with water, it will grow in the stomach without being digested.
07:35There are no particular symptoms for about a year after infection, but after a few years, when the worm grows to about 60 centimeters to 1 meter, it wanders through the skin and makes holes all over the body.
07:49The pain felt at that time is said to be like burning skin.
07:55So they try to put their feet in water to cool them down.
08:00The parasite then releases larvae into the water.
08:05In other words, it's all part of this parasite's plan.
08:12Now, finally, number one.
08:15Number one is Loaloa.
08:18This parasite infects humans by biting them.
08:24Once inside the body, they immediately become active and begin wandering around the body.
08:31As they travel, they leave behind traces of the battlefield, which become red and swollen.
08:38Unlike the third-placed, Onchocerpa volvulus, it does not just target the eyes but travels throughout the body.
08:48However, when it moves to the eye, the infected person can see the movement of the parasite inside the eye.
08:56They will not cause immediate blindness, but they can live for several decades, so it is probably best to remove them.
09:03What did you think?
09:08Parasites themselves are not heard of much anymore in Japan, but in developing countries they are still killing many people.
09:18Even Japanese people, especially those traveling to countries like these, may be wise to research in advance what diseases and parasites they should be careful of.
09:32Well, that's all for now. See you next time. Bye.
09:39Thank you for watching.
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