Psoroptic ear mites in dairy goats

Area of Science:

• Veterinary Parasitology
• Goat Health
• Mite Infestations

Background:

• Ear mites (Psoroptes cuniculi) are a known parasite of livestock.
• Subclinical infestations can impact animal welfare and productivity.
• Understanding mite prevalence and transmission is crucial for effective control.

Purpose of the Study:

• To investigate the prevalence of ear mites in dairy goats.
• To assess the correlation between mite infestation and clinical signs of ear scab.
• To determine the age of onset and transmission patterns in young goats.

Main Methods:

• Necropsy examination of 24 adult dairy goats.
• Clinical examination of approximately 200 live adult goats across 23 farms.
• Serial examination of goat kids on two farms to track infestation and clinical signs.

Main Results:

• High prevalence of ear mites (21/24) found at necropsy, with no gross signs of ear scab.
• Only one adult goat showed ear scabs, despite high rates of head shaking and ear scratching.
• Ear mite infestation was detected in young kids by 10 days of age, with clinical signs emerging by the third week of life.
• No cross-infestation observed between goats and sheep.

Conclusions:

• Dairy goats can carry significant ear mite burdens asymptomatically.
• Young kids are highly susceptible to ear mite infestation, developing clinical signs within weeks.
• Psoroptes cuniculi in goats does not appear to readily transmit to sheep.