Ticks and lice of cattle Flashcards
What 2 ticks are found in cattle?
Ixodes ricinus Rhipicephalus spp (tropical) Ablyomma spp (tropical)
What is the main vector of bovine babesiosis?
Ixodes ricinus
What habitat do Ixodes riicius require?
Wet habitat, under grazed pastures
How can Ixodes ricinus be distinguished?
Hypsotome
Palps
Spurs
Groove in front of anus
How many hosts do Ixodes ricinus require?
3
What pathogen does Rhipicephalus transmit?
Bovine babesiosis - warmer countries
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
What are the symptoms of Bovine babesiosis?
High fever
Lethargy
Dehydration
D+
What pathogens cause Bovine babesiosis in cattle?
Babesia divergens (main one) Babesia bovine
Describe the pathogenesis of Babesiosis
Feeding tick carries Babesia divergent
Develops in salivary gland
Causes progressive haemolytic anaemia and haemoglobinuria
How can cattle ticks be controlled?
Organophosphates, SPs, amitraz, prophylaxis
Regular dipping/spraying with acaricides
Vaccination
Which cattle tick is resistant to widespread acaricides?
Rhipicephalus microplus
What are the 2 mange mites in cattle?
Psoroptes ovis
Chorioptes bovis
Is psoroptic or chorioptic mange more severe? Which is more common?
Chrioptes more common, less severe
Psoroptes less common, more severe
Describe the morphology of chorioptes bovis
Round head
Short unjointed pedicles ending a cup
What does Chorioptic mange cause?
Alopecia
Pruritis
Scaling
What treatment is usually given for Chorioptes bovis?
Ivermectin
What does Psoroptes ovis cause in sheep? Does it affect cattle?
Sheep scab
Yes if housed in same area
What does Psoroptes ovis feed on?
Lymph
Pierces skin
What breed of cow has a high prevalence of Psoroptic mange?
Belgian blue
Descibe the morphology of Psoroptes ovis
Pointy head
Long pedicles ending in a2 part trumpet shape
What are the symptoms of Psoroptic mange?
Allergic dermatitis Severe irritation Scratching Skin damage Weight loss
Psoroptes ovis is very difficult to treat. Why is this?
Belgian blues resistant to MLs
Permethrin has low success rate
