Scarlet Fever in India: Re-Emergence, Clinical Profile, and Public Health Implications

Background: Scarlet fever, a toxin-mediated infectious disease caused by Streptococcus pyogenes (Group A Streptococcus, GAS), was historically a significant cause of childhood morbidity and mortality. After the advent of antibiotics, its incidence declined dramatically. However, over the past decade, global re-emergence has been documented, particularly in East Asia, the United Kingdom, and Europe. In India, sporadic outbreaks and rising notifications suggest a similar re-emergence pattern. Objective: This study aims to analyze the re-emergence of scarlet fever in India, describe its clinical characteristics, evaluate diagnostic and treatment approaches, and examine public health implications. Methods: A narrative review of peer-reviewed articles, outbreak reports, Integrated Disease Surveillance Programme (IDSP) data, National Centre for Disease Control (NCDC) bulletins, and WHO guidelines was conducted. Literature published between 2010 and 2025 was included. Data were extracted on epidemiology, clinical profile, diagnostics, management, and public health strategies, and analyzed thematically. Results: Scarlet fever cases in India have been increasingly reported in Kerala, Maharashtra, Karnataka, Uttar Pradesh, and select urban centers. Most cases occurred in children aged 5–15 years, with classical features including fever, pharyngitis, strawberry tongue, and a diffuse sandpaper-like rash. Pastia’s lines and circumoral pallor were frequently noted. Complications were rare but included acute otitis media, glomerulonephritis, and, in delayed or untreated cases, rheumatic fever. Diagnostic capacity remains limited, with most cases clinically diagnosed due to restricted access to throat cultures and RADT. Penicillin remains the first-line treatment; macrolides are increasingly used in penicillin-allergic individuals. Surveillance gaps, under-reporting, and inconsistent outbreak documentation limit the accurate assessment of national burden. Conclusion: Scarlet fever is re-emerging in India with typical clinical features but inadequate surveillance and diagnostic infrastructure. Strengthened laboratory capacity, early recognition by clinicians, school-based outbreak monitoring, and standardized national management guidelines are essential to prevent wider transmission.