Flashcards: micro 10

The word protozoa came from the Greek word called

Unicellular, eukaryotes that lack cell wall • Mostly heterotrophic and mostly free-living -scavenge on dead plants and animals and even feed on live bacteria and algae • Afew are parasitic/pathogenic feed directly on host fluids or can actively feed on tissue

Main limiting factor for survival is

motile feeding stage example

can survive adverse environmental conditions (an important factor in the spread of diseases like amoebic dysentery)

–move by flagella or tail- like structure

move by pseudopodia or false feet

move through cilia (fine hair- like structure attached to their body

non-motile form

•motility primarily by flagella • with a single nucleus

fusion of two cells, or of their nuclei, in reproduction

Asexual reproduction of Mastigophora

a blood sucking fly found only in some parts of Africa that transmits African sleeping sickness

cause African sleeping sickness

Gambian (West African strain)

Rhodesian (East African strain)

Also called American trypanosomiasis (blood infection

cause of Chagas disease

chagas disease is spreaded by

Leishmaniasis is caused by

Leishmaniasis is transmitted by

• Symptoms include Itching, burning, redness or soreness of the genitals; • Discomfort with urination; • Achange in genital discharge

trichomoniasis is caused by

• Single celled eukaryotic organisms that possess pseudopodia (“false feet”) • Asexual reproduction by binary fission • May come as naked in the vegetative stage (amoeba) or shelled (foraminifera)

causes amoebic dysentery. It attacks the intestinal wall with enzymes causing severe and often fatal diarrhea

transmission of Amoebiasis

brain-eating amoeba"

• Infects when water with amoeba enters through the nose during swimming or diving in warm freshwater places. •

The amoeba then travels up the nose to the brain where it destroys the brain tissue

a freshwater amoeba feed on algae, protozoa, rotifers, etc. by phagocytosis.

presence of hair-like organelles called cilia, shorter and present in much larger numbers than flagella-

common almost anywhere there is water — in lakes, ponds, oceans, rivers, and soils

which is concerned with inheritance

involved in RNA production or other aspects of cell growth or function

pathogenic, causes intestinal dysentery

free living protozoan

unicellular organism with a shape the sole of a shoe or slipper. • 50to300um in size depending on species. • • It is mostly found in a freshwater environment

sexuall reproduction of paramecium

asexual reproduction of paramecium

The only member of the ciliate phylum known to be pathogenic to humans

Also called the sporozoans or sporozoites

Form spores called ______ which function in the transmission into new host

movement of mature sporozites

possess a unique form of organelle that comprises a type of plastid

•Symptoms include high fever and shaking chills

Malaria is caused by

Malaria is transmitted by

normally a disease of cattle other livestock and pets, transmitted by the bite of ticks. •It affects the red blood cells and causes the passing of red or blackish urine. • Rare but life-threatening infection that may affect human

an intestinal illness caused by the microscopic parasite

cyclosporiasis is caused by

• Infection usually occurs by eating undercooked contaminated meat, exposure from infected cat feces • cause flu-like symptoms in some people

Toxoplasmosis is caused by

• coccidian parasite that affects the intestinal and respiratory epithelium of vertebrates.

• live in the intestines of humans and other animals and are shed through the stool.

Cryptosporidiosis is caused by