Ticks and lice of cattle Flashcards Preview

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Flashcards in Ticks and lice of cattle Deck (23)
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1

What 2 ticks are found in cattle?

Ixodes ricinus
Rhipicephalus spp (tropical)
Abyomma spp (tropical)

2

What is the main vector of bovine babesiosis?

Ixodes ricinus

3

What habitat do Ixodes riicius require?

Wet habitat, under grazed pastures

4

How can Ixodes ricinus be distinguished?

Hypsotome
Palps
Spurs
Groove in front of anus

5

How many hosts do Ixodes ricinus require?

3

6

What pathogen does Rhipicephalus transmit?

Bovine babesiosis - warmer countries

7

What is Ambyomma tick a vector of? Describe Ambyomma morphology

Heart water in cattle (Ehrlichia rumination)
Hypsotome, camoflauge type pattern on dorsal shield (scutum) and legs

8

What are the symptoms of Bovine babesiosis?

High fever
Lethargy
Dehydration
D+

9

What pathogens cause Bovine babesiosis in cattle?

Babesia divergens (main one)
Babesia bovine

10

Describe the pathogenesis of Babesiosis

Feeding tick carries Babesia divergent
Develops in salivary gland
Causes progressive haemolytic anaemia and haemoglobinuria

11

How can cattle ticks be controlled?

Organophosphates, SPs, amitraz, prophylaxis
Regular dipping/spraying with acaricides
Vaccination

12

Which cattle tick is resistant to widespread acaricides?

Rhipicephalus microplus

13

What are the 2 mange mites in cattle?

Psoroptes ovis
Chorioptes bovis

14

Is psoroptic or chorioptic mange more severe? Which is more common?

Chrioptes more common, less severe
Psoroptes less common, more severe

15

Describe the morphology of chorioptes bovis

Round head
Short unjointed pedicles ending a cup

16

What does Chorioptic mange cause?

Alopecia
Pruritis
Scaling

17

What treatment is usually given for Chorioptes bovis?

Ivermectin

18

What does Psoroptes ovis cause in sheep? Does it affect cattle?

Sheep scab
Yes if housed in same area

19

What does Psoroptes ovis feed on?

Lymph
Pierces skin

20

What breed of cow has a high prevalence of Psoroptic mange?

Belgian blue

21

Descibe the morphology of Psoroptes ovis

Pointy head
Long pedicles ending in a2 part trumpet shape

22

What are the symptoms of Psoroptic mange?

Allergic dermatitis
Severe irritation
Scratching
Skin damage
Weight loss

23

Psoroptes ovis is very difficult to treat. Why is this?

Belgian blues resistant to MLs
Permethrin has low success rate