Table 1. Cat-transmitted sporotrichosis case definitions used in study of human cases in Curitiba, Brazil, 2011–2022*.

Definition	Epidemiology	Clinical	Laboratory
Proven	History of trauma or contact with a cat with sporotrichosis	Lesions compatible with sporotrichosis	Positive culture and/or histopathology (microbiological evidence)
Probable	History of trauma or contact with a cat with sporotrichosis	Lesions compatible with sporotrichosis	Human: Negative culture and/or histopathology.† Sick cat: A) sporotrichosis diagnosed by culture and/or histopathology in a veterinarian laboratory; B) cat resident in a region with confirmed presence of cats with sporotrichosis (data verified by public health authorities)
Possible	History of trauma or contact with a cat with sporotrichosis	Lesions compatible with sporotrichosis	Absent
Non-CTS	History of trauma or contact with a cat with sporotrichosis	Lesions compatible with sporotrichosis	Negative culture and/or histopathology for Sporothrix spp.† Definition of other case of disease (infectious or noninfectious)

*Adapted from Guide to Health Surveillance, 5th ed (23–25). CTS, cat-transmitted sporotrichosis. †Negative culture for Sporothrix spp. alone does not rule out diagnosis (limitation of the culture).