BIOL 4105 Chapter : Protozoa
Document Summary
General characteristics of protozoa: single celled, eukaryotic, 1 nuclues (almost always, motile (most of them, only a small fraction are parasitic to man, gain entry 3 ways, 1) orally, 2) vector, 3) sexual transmission (std) Reproduction: general rule for protozoa: asexual in host, types of asexual, binary fission: one becomes two, multiple fission: one becomes many, schizogony, merogony, gametogony gametes (sexual stages, sexual reproduction, fusion of gametes (syngamy) zygote. To infect: to enter, inhabit, and reproduce with in another organism. Phylum sarcodina: order amoebida, family entamoebidae, genus (found in humans) Infective stage: resistant to environment, survive weeks in moist environment, chlorination will not kill cyst, dry heat or freezing can kill, host niche: large intestine and rectum, transmission direct. Ingestion of cyst: fecal contamination of food and/or h2o. Feet of flies, cockroaches, etc: sexually transmitted- anal sex, life cycle on moodle, severity of parasitic disease depends on .
