# Avian Mite Dermatitis Caused by Microlichus sp. in the Great Kiskadee (Pitangus sulphuratus)

## TL;DR

A juvenile Great Kiskadee bird in Brazil showed skin lesions caused by Microlichus mites, and treatment with ivermectin led to recovery.

## Contribution

First clinical report of Microlichus sp. causing dermatitis in Pitangus sulphuratus in Brazil.

## Key findings

- Microlichus sp. mites were identified in crust samples from the bird's lesions.
- Treatment with ivermectin led to resolution of lesions and feather regrowth.
- This case expands knowledge on epidermoptid mites in Neotropical birds.

## Abstract

To report a case of avian dermatitis associated with Microlichus sp. (Acari: Epidermoptidae) in a free-ranging Pitangus sulphuratus (Great Kiskadee) from southern Brazil, emphasizing the clinical presentation and parasitological diagnosis.

A juvenile P. sulphuratus was rescued and admitted to a wildlife rehabilitation center presenting feather loss and cutaneous lesions. Crust samples were collected from affected areas and examined microscopically after clarification in lactophenol. Mites were identified morphologically using classical and contemporary taxonomic keys. Topical ivermectin (0.4 mg/kg) was administered once daily for 10 consecutive days, and clinical evolution was monitored during rehabilitation.

Numerous mites morphologically consistent with Microlichus sp. were observed, supporting the diagnosis of epidermoptid infestation. Progressive resolution of dermatological lesions and complete feather regrowth were observed following treatment; however, no post-treatment parasitological reassessment was performed. To our knowledge, this represents the first clinical report of Microlichus sp. associated with dermatitis in P. sulphuratus in Brazil.

This case highlights the relevance of integrating clinical and parasitological investigations in wildlife rehabilitation settings and contributes to expanding current knowledge on the host range and potential health impacts of epidermoptid mites in free-ranging Neotropical birds.