What is Herpangina
Herpangina is a common, highly infectious childhood disease caused by enteroviruses—primarily Coxsackievirus A serotypes—characterized by acute onset of fever and distinctive painful vesicular or ulcerative lesions on the posterior pharynx, soft palate, and tonsillar pillars. 1
Etiology and Pathogenic Agents
- The main causative agents include Coxsackievirus A serotypes (particularly CV-A2, CV-A4, CV-A5, CV-A6, CV-A10), Enterovirus-A, and Echovirus. 1
- Multiple serotypes can circulate simultaneously, with CV-A2, CV-A4, and CV-A6 frequently identified as predominant strains in outbreak settings. 2
- At least 17 different enterovirus serotypes have been isolated from herpangina cases, demonstrating significant viral diversity. 3
Clinical Presentation
- Fever is the hallmark symptom, with herpangina patients demonstrating significantly higher body temperatures and fever incidence compared to hand-foot-and-mouth disease (HFMD) patients. 3
- Characteristic pharyngeal lesions appear as small vesicles (1-2mm) that rapidly ulcerate, located specifically on the posterior pharynx, soft palate, uvula, and tonsillar pillars—not on the anterior mouth or lips, which distinguishes it from HFMD. 1
- Painful swallowing (odynophagia) and sore throat accompany the lesions. 1
Epidemiology and Transmission
- Herpangina predominantly affects preschool children, with peak incidence in children aged 1-2 years. 4, 5
- Summer months (June-July) represent the primary epidemic season, with occasional secondary peaks in winter months. 4, 3
- Transmission occurs through fecal-oral route and respiratory droplet dissemination. 2
- The disease is highly contagious during active infection, requiring isolation measures in outbreak settings. 4
Diagnosis
- Clinical diagnosis is rendered based on the combination of epidemiological history, typical symptoms, and characteristic pharyngeal damage pattern. 1
- Virological confirmation can be obtained through real-time RT-PCR testing of throat swabs, with positive detection rates reaching 71.5% in outbreak settings. 2
- VP1 gene or 5'UTR region sequencing allows for specific enterovirus serotype identification. 4, 2
Clinical Course and Prognosis
- The disease course is generally self-limited, lasting 4-6 days with excellent prognosis. 1
- Most cases are asymptomatic or mild, resolving without complications. 2
Treatment Approach
- Management is primarily symptomatic, as the infection is self-resolving. 1
- Topical oral spray with antiviral agents may be incorporated for symptom relief. 1
- Supportive care includes adequate hydration, pain management, and fever control. 1