Pharyngoconjunctival fever

Pharyngoconjunctival fever (PCF) is a viral syndrome defined by the concurrent presence of sore throat (pharyngitis), red and painful eyes (conjunctivitis), and fever, typically resulting from infection with adenoviruses—particularly types B, C, E, and F. The condition is recognized as a distinct clinical pattern within the broader spectrum of adenovirus infections, which are known to affect multiple organ systems including respiratory, ocular, gastrointestinal, and central nervous systems. PCF is not a formal ICD-10/11 diagnosis but is used epidemiologically to describe this specific presentation in sentinel surveillance contexts.

The syndrome presents with sudden onset of fever, pharyngitis, and bilateral or unilateral conjunctival injection, often accompanied by rhinitis and cervical lymphadenopathy. In some cases, it may be associated with mild eye pain, photophobia, and discharge; more severe adenoviral keratoconjunctivitis can involve corneal involvement and prolonged resolution. Respiratory symptoms such as cough or nasal congestion may coexist, while gastrointestinal manifestations—including vomiting, diarrhea, and abdominal pain—can occur independently or concurrently. Onset typically occurs two to fourteen days after exposure, and although most cases resolve without sequelae, immunocompromised individuals may develop serious complications such as myocarditis, meningoencephalitis, or hepatitis.

PCF is observed globally and is commonly reported in pediatric populations, especially in settings with high interpersonal contact such as schools and daycare centers. Adenovirus types B, C, E, and F are the primary etiologic agents implicated in human disease, with type B being frequently associated with PCF. Transmission occurs through direct person-to-person contact, airborne droplets, or fomites, and outbreaks have been documented in swimming pools, military barracks, and institutional care facilities. While no formal ICD code exists for PCF, it is captured under broader adenovirus infection surveillance in many national systems, particularly where sentinel monitoring includes symptom-based syndromic reporting.

Adenovirus transmission occurs primarily via respiratory droplets, direct contact with infected secretions (e.g., saliva, tears), or contaminated surfaces. The virus may also spread through the fecal–oral route, though this is less common in PCF-specific cases. Incubation periods range from two to fourteen days, with infectiousness peaking during the acute phase of illness. Environmental persistence of adenovirus on surfaces has been demonstrated, supporting the role of fomite-mediated spread in communal settings.

Children, particularly those aged 2–10 years, are the most commonly affected group due to limited prior immunity and high exposure in group settings. Immunocompromised individuals—including those with HIV/AIDS, hematologic malignancies, or post-transplant status—are at increased risk for severe or disseminated disease, including meningoencephalitis, myocarditis, or hepatitis. Infants may present with atypical features such as earache or gastroenteritis, and may be more vulnerable to respiratory complications like bronchiolitis.

Preventive measures focus on standard infection control practices: hand hygiene, avoidance of sharing personal items, and environmental disinfection of high-touch surfaces. There is currently no licensed vaccine for adenovirus types associated with PCF, though vaccines exist for certain serotypes (e.g., types 4 and 7) in military populations. Public health interventions during outbreaks include isolation of symptomatic individuals, cohorting in institutional settings, and enhanced surveillance to detect clusters early.

In surveillance contexts, PCF should be identified through syndromic reporting of fever with pharyngitis and conjunctivitis, particularly in children aged 2–10 years. Case definitions should include temporal clustering, absence of other common causes (e.g., influenza, streptococcal pharyngitis), and confirmation via laboratory testing when feasible. Given the lack of specific ICD coding, PCF remains a descriptive term used for epidemiological tracking rather than a diagnostic entity. Source-backed detail on geographic variation, seasonality, or long-term outcomes is not available in the provided snippets.

1. 1 Wikidata. pharyngoconjunctival fever.
2. 2 Wikipedia. Adenovirus infection - Wikipedia.

ICD-10

ICD-11

Total cases

973K

Peak month

2023-12

Coverage

1 reporting countries · 2012-09-15 → 2026-05-02