Ringworm by Nannizzia nana: Clinical case and literature review

Josué Pendones-Ulerio; Monica Martins-Lopes; Fernando García-Garrote; Paula Hernández-Calvo; Manuela Yuste-Chaves; María Nieves Gutiérrez-Zufiaurre

doi:10.1016/j.eimce.2023.03.001

Ringworm by Nannizzia nana: Clinical case and literature review

Enferm Infecc Microbiol Clin (Engl Ed). 2023 Oct;41(8):501-504. doi: 10.1016/j.eimce.2023.03.001. Epub 2023 Mar 15.

Authors

Josué Pendones-Ulerio¹, Monica Martins-Lopes², Fernando García-Garrote³, Paula Hernández-Calvo³, Manuela Yuste-Chaves², María Nieves Gutiérrez-Zufiaurre³

Affiliations

¹ Servicio de Microbiología, Complejo Asistencial Universitario de Salamanca, Salamanca, Spain. Electronic address: josuependones@gmail.com.
² Servicio de Dermatología, Complejo Asistencial Universitario de Salamanca, Salamanca, Spain.
³ Servicio de Microbiología, Complejo Asistencial Universitario de Salamanca, Salamanca, Spain.

PMID: 36931920
DOI: 10.1016/j.eimce.2023.03.001

Abstract

Introduction: Human dermatophytoses are the most widespread infections caused by fungi. These are capable of invading the keratin-containing tissues of animals. Nannizzia nana (N. nana) can cause ringworm in pigs and rarely cause infections in humans.

Methods: We conducted a search using PUBMED for articles published from January 1, 1990 to March 31, 2022 to identify additional cases. The search terms used were "Microsporum nanum" and "Nannizzia nana".

Results: After reviewing the literature, we identified a total of 16 cases of dermatophytosis due to N. nana since 1990. In most of the patients, the clinical diagnosis was tinea corporis and the most widely used antifungals were: terbinafine and griseofulvin.

Conclusion: N. nana is a dermatophyte species isolated infrequently in humans, but it represents a potential source of dermatophytosis in people who come into direct or indirect contact with animals and soil.

Keywords: Dermatofito; Dermatophyte; Microsporum nanum; Nannizzia nana; Ringworm; Tiña corporal.