TITLE:
Parathyridaria percutanea, Subramaniula asteroides, and Albifimbria verrucaria as Uncommon Causes of Keratitis in Mexican Patients: A Challenge in Their Identification and Treatment
AUTHORS:
Virginia Vanzzini-Zago, Ethel Guindo, Emmanuel Cabrera, Erika Córdova-Martínez, Patricia Manzano-Gayosso, Dolores Ríos y Valles-Valles, Ivette Hernández-Ayuso, Francisca Hernández-Hernández
KEYWORDS:
Fungal Keratitis, Parathyridaria, Subramaniula, Albifimbria, Corneal Ulcers
JOURNAL NAME:
Advances in Microbiology,
Vol.16 No.8,
August
28,
2026
ABSTRACT: Fungal keratitis is most frequently associated with ocular trauma. Predisposing factors have also been observed in many cases. Treatment outcomes are not always successful owing to antifungal drug resistance or other patient conditions. Aspergillus and Fusarium are the most frequent fungal genera causing keratitis. However, there are many other uncommon genera or species that are difficult to identify by morphology or to select an effective treatment without in vitro antifungal drug susceptibility testing. One, two, and three cases of Parathyridaria percutanea, Subramaniula asteroides, and Albifimbria verrucaria, respectively, have been reported in the literature. Here, we report one case each diagnosed in Mexican patients by PCR-sequencing, with variable treatment results.