Parasites

Question 1

Internal (tape worm)

Answer 1

Live naturally in GIT, liver, lungs, brain etc

Anemia, swelling under the jaw, digestion disturbed, GIT abcesses, diarrhea

Benzimidazole, organophasphates, fence danger areas, rest pasture, breed for resistance,

Question 2

Tonia multiceps

“Turning disease”

Answer 2

Jackal has tapeworm, segments in faeces infect veld. Sheep consume, grow in intestines, coenuris bact enter blood, watery cysts press on the brain, dies, eaten by jackal

Sheep walk in a circle, rest head against pole, appear blind

Drench, surgically removed, urn brains, de worm dogs, fences against jackals

Question 3

Sheep scab

Answer 3

Barely visible mites lay eggs in fleece

Rubbing, biting, ooze serum through hard crusty skin

Quarantine dip inject fence off from other farms

Question 4

Itch mite

Answer 4

Psorergate mite active in winter

Untidy discolored fleece, thick crusted skin, not as itchy as sheep scab

Regular treatment with registered injectable drugs

Question 5

Blowflies

Green, copper, striped green, blue

Answer 5

Attracted by afterbirth. Behind head, hind legs, around horns, genital areas

Restless, anxious, bite itchy areas, maggots visible

Diazinone, inject endectocides, shear wool, antiseptics, cull excessive pleated wool animals

Question 6

Paralysis ticks

Answer 6

Karoo ticks adults, spring lamb paralysis tick

Material clots around bites, parlayed, starve to death

Remove by hand, manage veld, dips

Question 7

Black flies/river midge

Answer 7

Blood sucking, irritants hundreds of bites, running butting itching stamping. Condition and milk prod deteriorate

Around eyes and ears mainly

Pyrethroid drugs, remove crusts

Question 8

Heart water

Answer 8

Not and heart water ticks

Fever, appetite loss, walk in circles, light sensitive, death
PM: dark purple lungs, straw colored body fluids, enlarged spleen, foamy trachea

Vacc, Tetracycline, dip