What causes herpangina?

Herpangina Cause

Herpangina is caused by enteroviruses, most commonly Coxsackievirus A serotypes (particularly A2, A4, A6, A10, and A16), as well as Enterovirus A71 and occasionally Echovirus. 1, 2

Primary Causative Agents

The main pathogenic serotypes include:

• Coxsackievirus A (most frequent cause)

  • CV-A2 has been identified as highly prevalent, accounting for 33% of cases in recent epidemiological studies 3
  • CV-A4 represents approximately 16% of cases 3

• Enterovirus A71 - a significant cause that can also lead to hand, foot, and mouth disease 2

• Echovirus - less common but documented cause 1

• Enterovirus B - documented in outbreak settings 4

Transmission Mechanism

The virus spreads through:

• Fecal-oral route (primary)
• Respiratory droplets from infected individuals
• Direct contact with oral secretions

The incubation period typically ranges from 2-10 days, with most cases occurring in children under 10 years of age 1.

Clinical Context

The disease is self-limited with a typical course of 4-6 days and generally carries an excellent prognosis 1. The characteristic pharyngeal lesions (vesicles and ulcers on the soft palate, tonsils, and uvula) distinguish it from other viral pharyngitides, though the underlying enteroviral etiology remains consistent across presentations.

The predominant serotypes can vary by geographic region and year, as demonstrated by the CV-A2 predominance in Thailand (2015) 3 and Enterovirus B outbreak in the Brazilian Amazon (2009) 4, emphasizing the importance of local epidemiological surveillance for outbreak management.