Cyniclomyces guttulatus EM CÃO – RELATO DE CASO

Abstract

The increasing number of laboratory diagnoses of Cyniclomyces guttulatus in dogs raises questions about its true clinical significance in gastrointestinal affections. This fungus, commensal in rodents and rabbits, is frequently identified in cases of intestinal dysbiosis and immunosuppression, acting as an opportunistic agent. The present study aims to report the case of a dog with chronic diarrhea, diagnosed with C. guttulatus, analyzing the clinical and laboratory aspects and the possible association of the agent with gastrointestinal disorders. An 11-year-old, mixed-breed female dog, rescued from an overcrowded shelter, was presented with pasty diarrhea accompanied by melena, apathy, and non-regenerative anemia. Diagnosis included coproparasitological examination (Willis-Mollay method) for C. guttulatus, a complete blood count, and abdominal ultrasonography, which indicated diffuse inflammation, leading to a presumptive diagnosis of Inflammatory Bowel Disease. Treatment consisted of fluconazole and probiotics administered for 5 days. The patient showed a favorable clinical recovery, with normalization of fecal consistency, resolution of melena, and progressive increase in hematocrit levels, with no relapses during the follow-up period. This case reinforces the opportunistic behavior of C. guttulatus, acting as a marker of intestinal disorder in environments of stress and systemic fragility. The improvement of anemia concomitant with the control of enteropathy highlights the interrelationship between chronic intestinal inflammation and hematological changes. It is concluded that the interpretation of the fungus's presence must be contextualized, and integrated clinical management is fundamental for therapeutic success.