Family-Wide Infection with Microsporum canis Following Exposure to a Domestic Cat
Tinea capitis is a superficial dermatophyte infection affecting the hair and scalp. The zoophilic dermatophyte Microsporum canis is one of the most frequent causes of both tinea capitis and tinea corporis in humans, particularly in children.
We present a case report involving whole-family transmission of M. canis due to close contact with a neighbor’s cat. All five children in the household developed scaly scalp lesions consistent with tinea capitis, while the parents exhibited only mild cutaneous involvement. Skin scrapings and hair samples from all family members were collected and analyzed using PCR, confirming M. canis in all family members.
The children were successfully treated with oral griseofulvin, while the parents responded well to topical ketoconazole shampoo.
This case highlights the importance of clinical awareness of tinea capitis, as early diagnosis and treatment are essential to prevent chronic hair changes and limit further transmission. Additionally, treatment of the infected animal under veterinary supervision is crucial to avoid reinfection.
DOI: 10.29245/2767-5092/2025/3.1202 View / Download Pdf