03 - Amoebae, Trichomonads, Histomonads

Question 1

(Entamoeba Invadens)

1. causative agent of amebiasis in what?
2. get anorexia, weight loss, blood

Answer 1

1. reptiles

(similar to E. histolytica)

Question 2

(Pathogenic Free-Living Amoeba)

(Naegleria and Acanthamoeba)

1. in soil, water, sewage
2. what kind of parasites?

(Acanthamoeba)

3. most common amoeba of freshwater and soil
4. can enter how?

(Naegleria)

5. also in water

resistant to heat

infect humans, dogs, sheep

CAN CAUSE WHAT?

Answer 2

2. facultative
3. via CNS if immunocompromised or broken skin (more often - contact lenses)
4. primary amoebic meningoencephalitis

(trophozoites enter nasal passages and get into brain)

figure out at autopsy

Question 3

Answer 3

Question 4

(Trichomonads)

give the animal for each

1. tritrichomonas foetus
2. tritrichomonas gallinae
3. tritrichomonas vaginalis
4. tetratrichomonas gallinarum

Answer 4

Question 5

(Tritrichomonas foetus)

1. in what animal?
2. hangs out where?
3. what has reduced incidence?

Answer 5

1. cattle
2. repro (sheath in male)
3. AI

Question 6

(Tritrichomonas Foetus)

1. multiply how?
2. tranmission?
3. what happens in bull?
4. in female?

Answer 6

1. binary fission (no cysts)
2. sex/ai

(bulls permanently infected)

(females can self cure or bcome carriers)

3. nothing
4. enodometritis/abortion (can lead to sterility if severe)

Question 9

Answer 9

NO ADEQUATE TREATMENT!!!

Question 10

1. tritrichomonas foetus has recently moved to what host?

Answer 10

1. Cats

Question 11

(tritrichomonas foetues in cats)

1. is it repsonsive to Rx?

Answer 11

1. no!

Question 12

(Trichomonas Gallinae)

1. parasite of what?
2. hosts?
3. do pigeons show evidence of infection?
4. passed via what?

Answer 12

1. mouth, esophagus, and crop of birds
2. pigeons, morning doves

raptors which feed on these

sometimes chickens and turkeys

3. no
4. pigeon milk

Question 13

Answer 13

Question 14

Answer 14

Question 15

(Tetratrichomonoas Gallinarum)

1. parasite of what?
2. where at?
3. transmission?

Answer 15

1. lower instestine of galliform (chicken family) birds
2. cosmopolitan
3. fecal/oral

Question 16

(Trichomonas Vaginalis)

1. infects what?
2. how transmitted?

Answer 16

1. humans
2. sexually

Question 17

do wee see trichomonads in reptiles?

Answer 17

yes (iguana for example)

Question 18

(Histomonas Meleagradis)

1. causative agent of what?

Answer 18

1. blackhead in turkeys/chickens (head becomes blue - cyanotic)

(very importatn to turkey industry)

Question 19

(Histomonas Meleagradis)

1. defeinitive Hosts?
2. intermediate?
3. transport?
4. distribution in worldwide
5. reproduce how?
6. turkeys may be infected by ingesting histomonads in fresh feces…. what is principal transmission?

Answer 19

1. gallinaceous birds

(turkeys, chukkar partridge, ruff grouse severely affected — chickens, peafowl, guinea hens, pheasants often asymptomatic)

3. cecal worm (Heterakis gallinarum)
4. earthworm, flies, grasshoppers, sowbugs, crickets
5. binary fission
6. ingesting histomonas infected eggs of heterakis gallinarum

Question 20

Answer 20

Question 21

(Pathogensis)

1. how do they get into liver?

Answer 21

1. invade wall of cecum, produce lesions and pass to liver via blood stream

Question 22

(clincial signs)

1. what colored droppings?
2. head becomes what?

(Diagnosis)

1. history, signs and lesions
2. microscopic identification of organisms

Answer 22

1. sulfur
2. cyanotic

Question 23