Background: Frequent outbreaks of dengue, malaria, typhoid, and influenza are very common in India, especially during the monsoon season. This study aimed at analyzing the cause and outcome of such febrile cases admitted in a tertiary care private hospital of Kolkata, India. Methods: An audit of patients (N=840) admitted to the hospital with fever was carried out from June to November, 2017 and were studied for diagnosis and clinical outcome. Data were collected, analyzed and documented using Microsoft Office Excel 2007 version. Results: Dengue was the most common infection accounting for 78.3% of all cases, followed by Influenza (8.2%) and Scrub typhus (6.5%). A total of 14 deaths occurred during the outbreak; mortality was higher among females (57.1%) and in patients with scrub typhus (8.3%). Discussion: This study confirms the need of including scrub typhus screening test in the fever panel. Studies assessing the prevalence and outcomes of scrub typhus must be done in Indian hospitals to understand the morbidity and mortality patterns better.