The symptoms of malaria occur at regular intervals because Blank______.Multiple choice question.destruction of immune cell factors occurs every 48-72 hoursrupturing of red blood cells occurs every 48-72 hoursthe pathogen is dormant for 48-72 hours before replicatingthe vector transmits the pathogen every night

Red blood cells in which the malarial-fever parasite resides are eliminated from a person's body after 120 days. Because the parasite cannot travel to a new generation of red blood cells, any fever that develops in a person more than 120 days after that person has moved to a malaria-free region is not due to the malarial parasite. Which is the following, if true, most seriously weakens the conclusion above?Choices:- The fever caused by the malarial parasite may resemble the fever caused by flu viruses. The anopheles mosquito, which is the principal insect carrier of the malarial parasite, has been eradicated in many parts of the world. Many malarial symptoms other than the fever, which can be suppressed with anti-malarial medication, can reappear within 120 days after the medication is discontinued. In some cases, the parasite that causes malarial fever travels to cells of the spleen, which are less frequently eliminated from a person's body than are red blood cells.

Select all correct descriptions of malaria.Multiple select question.It is always fatal.Severe anemia is possible.Illness occurs within one week after being bitten by an infected mosquito.Cyclical pattern of symptoms corresponds with bursting of red blood cells.It can be diagnosed by viewing parasites in blood.

Malaria has the highest death rate during the Blank______ phase.Multiple choice question.acutechroniclatentprodromal

The key factor that determines the distribution of malaria throughout the world is the Blank______.Multiple choice question.availability of susceptible hostsaccess to the malaria vaccinesexual behavior of the human populationpresence of the mosquito vector

Parasites of the genus Plasmodium, which cause malaria, are transmitted Blank______.Multiple choice question.through the bite of a mosquitoby eating contaminated foodthrough the airby sexual contact