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Parasitology > Cattle ticks/mites/lice > Flashcards

Cattle ticks/mites/lice Flashcards

1
Q

what are the main mites effecting cattle?

A

Chorioptes bovis

Psoroptes spp.

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2
Q

Is Chorioptes bovis a burrowing or non-burrowing mite?

A

non-burrowing

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3
Q

describe the morphology of Chorioptes bovis

A 
rounded head
short unjointed pedicels
cup shaped suckers on pedicels
setae on back legs
thumb print pattern
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4
Q

where on the host is Chorioptes bovis found?

A

neck
tail
udder

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5
Q

how long is the egg to adult lifecycle of Chorioptes bovis?

A

3 weeks

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6
Q

where are eggs of Chorioptes bovis laid?

A

on the skin

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7
Q

how many legs do the larvae of Chorioptes bovis have?

A

6

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8
Q

what do Chorioptes bovis larvae moult to before reaching the adult stage?

A

protonymph

tritonymph

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9
Q

what are the clinical signs of Chorioptes bovis?

A

pruritus
alopecia
scaling

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10
Q

describe the morphology of Psoroptes spp.

A

pointed head
obvious pedicels with 3 segments
trumpet shaped suckers on pedicels

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11
Q

where does Psoroptes spp. infect on the host first?

A

withers
neck
tail base

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12
Q

what are the clinical signs of Psoroptes spp.?

A

allergic dermatitis
severe pruritus
skin damage
weight loss

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13
Q

what are the ticks that effect cattle?

A

Ixodes ricinus
Rhipicephalus microplus
Rhipicephalus appendiculatus
Amblyomma spp.

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14
Q

describe the morphology of Ixodes ricinus

A

long palps either side of hypostome
scutum (dorsal hardened plate)
anal groove

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15
Q

how many hosts does Ixodes ricinus have?

A

3

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16
Q

what conditions does Ixodes ricinus need to quest?

A

about 7°C

damp and humid

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17
Q

what diseases does Ixodes ricinus transmit?

A

Babesia divergens (red water)

18
Q

what are the clinical signs of Babesia divergens?

A 
haemoglobinuria
haemolytic anaemia
pyrexia
dehydration
diarrhoea
19
Q

what disease does Rhipicephalus microplus transmit?

A

Babesia bovis

20
Q

how many hosts does Rhipicephalus microplus have?

A

1 (exclusively cattle)

21
Q

how long is larvae to adult lifecycle of Rhipicephalus microplus?

A

3 weeks

22
Q

what are the clinical signs of Babesia bovis?

A

pyrexia
neurological signs
haemoglobinuria (red water)
death in days

23
Q

what disease does Rhipicephalus appendiculatus transmit?

A

Thelieria parva (east coast fever)

24
Q

how many hosts does Rhipicephalus appendiculatus have?

A

3

25
Q

what are the clinical signs of East Coast Fever?

A

pyrexia
lymph node swelling
anorexia
death

26
Q

what disease does Amblyomma spp. transmit?

A

Ehrlichia ruminantium (heart water)

27
Q

what are the clinical signs of heart water?

A

pyrexia and then rapid death

28
Q

what are the lice that effect cattle? (4)

A

Haematopinus eurysternus
Linognathus vituli
Solenopotes spp.
Bovicola

29
Q

what are the groups of louse? (2)

A

Mallophaga - biting/chewing

Anoplura - sucking

30
Q

what are the sucking lice of cattle? (3)

A

Haematopinus eurysternus
Linognathus vituli
Solenopotes spp.

31
Q

what is the biting louse of cattle?

A

Bovicola

32
Q

what are the clinical signs of pediculosis?

A

pruritus
hair loss
anaemia (sucking)
weakness

33
Q

where on the host is Haematopinus eurysternus found?

A

horn base
eyes
nostril

34
Q

where on the host is Linognathus vituli found?

A

head
neck
dewlap

35
Q

where on the host is Solenopotes spp. found?

A

head
neck
dewlap

36
Q

where on the host is Bovicola found?

A

forehead
shoulders
back
rump

37
Q

what can be used to treat lice?

A

synthetic pyrethroids

macrocyclic lactones

38
Q

describe the morphology of Haematopinus eurysternus

A

yellow/brown
small pointed head
dark margins on abdominal segments

39
Q

describe the morphology of Linognathus vituli

A

blue/black

long nose

40
Q

describe the morphology of Bovicola

A

red/brown

rounded head

Parasitology (9 decks)

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