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Anatomy of the Ear

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Auditory sensation, commonly called hearing, involves the transformation of sonic waves into neural impulses facilitated by the structures of the auditory organ. The prominent, flesh-like structure on the side of the head, called the auricle, directs sound waves towards the auditory canal. The auricle is often mislabeled as the pinna, a term more aligned with mobile structures like a feline's external ear. The auditory canal penetrates the cranium via the external auditory meatus of the...

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In Vivo Methods to Assess Retinal Ganglion Cell and Optic Nerve Function and Structure in Large Animals

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Gotch ear in a goat: a case report.

Kristine T Edwards¹, Andrea S Varela-Stokes, Christopher D Paddock

¹Department of Entomology and Plant Pathology, College of Veterinary Medicine, Mississippi State University, Mississippi State, Mississippi 39762, USA. kt20@msstate.edu

Vector Borne and Zoonotic Diseases (Larchmont, N.Y.)

|March 15, 2011

Summary

This study reports the first case of gotch ear in a goat, caused by Gulf Coast ticks (Amblyomma maculatum). The condition resolved after tick removal, suggesting it

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Published on: February 27, 2018

Area of Science:

Veterinary Medicine
Parasitology
Rickettsial Diseases

Background:

Gotch ear, characterized by ear deformity, is commonly associated with tick bites in cattle.
The etiology of gotch ear, particularly the role of rickettsial infections, requires further investigation.

Observation:

A 1-year-old Saanen goat presented with unilateral ear drooping and edema, consistent with gotch ear.
Three engorged Gulf Coast ticks (Amblyomma maculatum) were found attached within the affected ear.

Findings:

Tick removal and topical betadine treatment led to complete resolution of ear edema within 3 days.
Polymerase chain reaction analysis confirmed Rickettsia parkeri in the ticks but not in the ear tissue.
Immunohistochemical analysis of ear samples showed no evidence of spotted fever group rickettsia.

Implications:

This case suggests that gotch ear in goats is likely a direct result of tick infestation rather than a rickettsial infection.
Further research is needed to understand the pathogenesis of tick-induced ear deformities in various animal species.
This finding expands the known host range for Gulf Coast ticks and associated conditions.