Biology Questions and Answers
agents that cause STDs (sexually
transmitted diseases).
- What are the etiological
agents of malaria?
The etiological agents oprotozoans of the genus Plasmodium.f malaria are (^)
There are four different types of
plasmodia that cause malaria:Plasmodium malariae, Plasmodium (^)
vivax, Plasmodium falciparum and
Plasmodium ovale.
- What are the human
tissues affected by malaria?
What are the main clinical
manifestations of the disease?
The plasmodium infects the human
blood causing cells and it also afdestruction fects the liveof red bloodr. Malaria (^)
characterizes by periodical episodes of
fever, chillsaccompanied by headache, and sweating that can benausea,
vomiting and jaundice. The destruction
of red blood cells may land hypoxemia. ead to anemia
The infection by if not treated can cause otPlasmodium falciparher um
complications and even death.
- What is the vector of
malaria? How different is its
behavior from the behavior of
the vector of dengue fever?
The vector othe genus Anof malaria ispheles, also called a mosquito of
anopheline. In opposition to thmosquito vector of the dengue fever,e (^)
the anopheline has nocturnal habits.
- What are the intermediate
and the definitive hosts of the
plasmodium?
In the life cycle ohumans are the intermediate hostsf the plasmodium (^)
(where asexual reproduction takesplace) and the vector mosquito is th (^) e
definitive host (where sexual
reproduction occurs).
- What is the life cycle of
Plasmodium vivax?
The vector moscontaminated pquito biterson and ingests femalees a (^)
and male gametocytes of the parasite.
Within the insect gudifferentiate into gametes at the gametocytesnd
fecundation occuEach plasmodium zyrs, forming zygotes.gote by mitosis
(sporogony) generates numerous
infective spsalivary glands of the mosquito. orozoites that migrate to tWhenhe
the mosquito bites a person the
sporozoites eand when in the liver thnter the human circulationey undergo the
first asexual reproduction (tissue
schizogony), merozoites into the blood. Thereleasing several (^)
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