DENV-4

Overview

DENV-4 is one of the four dengue virus serotypes (DENV-1 through DENV-4). It caused the 2006 Cuban epidemic — the first DENV-4 outbreak in Cuba — following prior epidemics of DENV-1 (1977), DENV-2 (1981), and DENV-3 (2001). This serial introduction of serotypes means many Cuban adults infected in 2006 were experiencing a secondary, tertiary, or quaternary dengue infection.

Key Points from Literature

• The 2006 Cuban DENV-4 epidemic provided a cohort of hospitalized adults with known prior infection sequences, enabling follow-up studies on sequelae, immunological correlates, and genetic risk factors (see Garcia2009 - Long-term Clinical Symptoms Post-Dengue, Garcia2010 - Asymptomatic Dengue FcγRIIa Polymorphism).
• Among a symptomatic subset followed 2 years post-infection, 12/26 had tetravalent infection history (DENV-1→2→3→4); only 5/26 were experiencing primary DENV-4 infection. Accumulating infection history may be a trigger for post-dengue autoimmunity (see Garcia2009 - Long-term Clinical Symptoms Post-Dengue).
• The same 2006 DENV-4 cohort (97 symptomatic + 42 asymptomatic) was used to show FcγRIIa-HH as a strong risk factor for symptomatic disease (DF and DHF) vs asymptomatic infection, and RR as protective (see Garcia2010 - Asymptomatic Dengue FcγRIIa Polymorphism).

DENV-4 in the Cuban serial serotype introduction pattern

Guzman2016 describes DENV-4’s introduction as part of the larger pattern of sequential serotype introductions into Cuba — a country with strong vector control and no endemic dengue between epidemics. The sequence was: DENV-1 (1977) → DENV-2 Asian genotype (1981) → DENV-3 Asian genotype (2001) → DENV-4 (2006). Notably, the DENV-4 epidemic in Havana in 2006 was contained within months — attributed to the residual effectiveness of the Cuban vector control programme. In contrast, the 1981 DENV-2 epidemic was the first time DHF/DSS appeared on a large scale in the Americas, demonstrating the classical DENV-1 primary → DENV-2 secondary ADE-enhanced severity pattern (see Guzman2016 - Dengue Infection).

Contradictions & Debates

None yet recorded.

Related Pages

• Post-Dengue Syndrome
• Autoimmunity in Dengue
• Asymptomatic Dengue Infection
• Cuba
• FcγRIIa Receptor
• PRNT
• ELISA Inhibition Method
• Antibody-Dependent Enhancement

Sources

• Garcia2009 - Long-term Clinical Symptoms Post-Dengue
• Garcia2010 - Asymptomatic Dengue FcγRIIa Polymorphism
• Guzman2016 - Dengue Infection (serial serotype introduction; DENV-4 Havana 2006 containment; Cuban epidemic pattern)