This is caused by a parasite called Plasmodium, which is transmitted via the bites of infected mosquitoes. In the human body, the parasites multiply in the liver and then infect red blood cells.
Symptoms of malaria include:
Fever, headache, and vomiting, and usually appear between 10 and 15 days after the mosquito bite. If not treated, malaria can quickly become life-threatening by disrupting the blood supply to vital organs. In many parts of the world, the parasites have developed resistance to a number of malaria medicines.
This is a bacterial infection that can spread throughout the body, affecting many organs. Without prompt treatment, it can cause serious complications and can be fatal.
It is caused by a bacterium called Salmonella typhi, which is related to the bacteria that cause salmonella food poisoning.
Typhoid fever is highly contagious. An infected person can pass the bacteria out of their body in their stools (feces) or, less commonly, in their urine.
If someone else eats food or drinks water that has been contaminated with a small number of infected feces or urine, they can become infected with the bacteria and develop typhoid fever.
This is passing looser or more frequent stools than is normal for you.
It affects most people from time to time and is usually nothing to worry about. However, it can be distressing and unpleasant until it passes, which normally takes a few days to a week.
What causes Diarrhea?
There are many different causes of diarrhea, but a bowel infection (gastroenteritis) is a common cause in both adults and children.
Gastroenteritis can be caused by:
a virus – such as a norovirus or a rotavirus
bacteria – such as Campylobacter and Escherichia coli (E. coli), which are often picked up from contaminated food
a parasite – such as a parasite that causes giardiasis, which is spread in contaminated water