Visceral Leishmaniasis in the Republic of North Macedonia: A Retrospective Cohort Study

Introduction: Visceral leishmaniasis (VL) is a systemic protozoan vector-borne disease and represents the most severe clinical form of leishmaniasis, with fatal outcomes if left untreated. This study aimed to evaluate the key epidemiological, clinical, and laboratory findings, treatment options, and outcomes in patients with VL. Materials and Methods: A retrospective analysis was conducted on the epidemiological and clinical characteristics of 84 patients diagnosed and treated for VL at the University Hospital for Infectious Diseases in Skopje, Republic of North Macedonia (RNM), between 2001 and 2023. Results: The median age of patients was 47 years (range 1-74), with 77.4% being male. Contact with dogs was reported in 41.7% of cases. Seven percent of patients were immunosuppressed, and all were Human Immunodeficiency Virus-negative. The median time from symptom onset to diagnosis was 30 days (range 4-330 days). The predominant clinical manifestations were splenomegaly (97.6%), fever (96.4%), hepatomegaly (90.5%), and weight loss (54.8%). On admission, anemia, leukopenia, thrombocytopenia, and hypergammaglobulinemia were detected in 75%, 73.8%, 70.2%, and 63.1% of patients, respectively. A favorable outcome was achieved in 91.7% of cases; therapeutic failure occurred in 1.2%, and 7.1% of patients died. Conclusion: VL should be considered a crucial differential diagnosis in patients from the RNM presenting with prolonged unexplained fever, splenomegaly, cytopenia, and hypergammaglobulinemia.