Protozoa (原虫)
Protozoa (原虫)
General Account One-cell animal- monocellular or unicellular organisms with full vital fur nctions Species total named species: 65,000 parasitic: around 10,000 Entamoeba histolytica Entamoeba histolytica oIO immature cyst
General Account • One-cell animal – monocellular or unicellular organisms with full vital functions • Species – total named species:65,000; parasitic: around 10,000
Classification of protozoa Amoebae Flagellates Sporozoa d Ciliates
Classification of protozoa Amoebae Flagellates Ciliates Sporozoa
Life cycle patterns One-host form 1. One stage form -Trophozoite 2. Two stage form Trophozoite cyst TWo-host form 1 Mammals mammals 2. Mammals<> insect vectors
Life cycle patterns One-host form 1. One stage form – Trophozoite 2. Two stage form – Trophozoite & Cyst Two-host form 1. Mammals mammals 2. Mammals insect vectors
Mode of Reproduction Asexual Reproduction Binary fission result in 2 daughter cells Schizogony multiple fission result in multiple cells Budding Exogenous budding- by external budding result in multi- cells Endodyogony by internal budding result in 2 cells Sexual Reproduction Conjugation - exchange of nuclear material of 2 Gametogony sexually differentiated cells unite--zygote
Mode of Reproduction • Asexual Reproduction ▪ Binary fission – result in 2 daughter cells ▪ Schizogony – multiple fission result in multiple cells ▪ Budding ▪ Exogenous budding - by external budding result in multi- cells ▪ Endodyogony - by internal budding result in 2 cells • Sexual Reproduction ▪ Conjugation – exchange of nuclear material of 2 ▪ Gametogony – sexually differentiated cells unite -- zygote