MEDICALLY IMPORTANT PHYLA OF PROTOZO1

MEDICALLY IMPORTANT PHYLA OF PROTOZO1 - cell ruptures, the...

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MEDICALLY IMPORTANT PHYLA OF PROTOZOA The life cycle is: 1) A mosquito carrying the infective state of  Plasmodium  (called a sporozoite) bites a human and  injects sporozoites into the bloodstream. They are carried to the liver.  2) In the liver they undergo schizogony and produce thousands of a form known as a merozoite.  This is asexual reproduction. 3) Merozoites enter the bloodstream and each infects a red blood cell. 4) Merozoites can be seen inside the red blood cell as a clear ring inside which the nucleus and cytoplasm are visible. This is called the ring stage.  5) The ring stage enlarges and divides repeatedly. (More asexual reproduction.)  6) Eventually the red blood cell ruptures and releases the merozoites into the blood. As the blood 
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Unformatted text preview: cell ruptures, the waste products of the merozoites also enter the blood, and cause chills and fever. Most of the merozoites invade new red blood cells and repeat the cycle. A few of the merozoites change and develop into male and female sexual forms (gametocytes). The gametocytes circulate in the blood and cause no further damage. 7) However, if gametocytes are picked up by an Anopheles mosquito feeding on the blood, they enter the intestine of the mosquito and begin the cycle of sexual reproduction. 8) Male and female gametocyte unite to form a zygote. The zygote forms an oocyst, in which cell division occurs and numbers of sporozoites are formed....
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This note was uploaded on 01/23/2012 for the course MCB MCB2010 taught by Professor Smith during the Fall '09 term at Broward College.

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