Chikungunya virus infection.

Area of Science:

• Virology
• Epidemiology
• Public Health

Background:

• Chikungunya virus (CHIKV), an alphavirus transmitted by Aedes mosquitoes, has recently emerged globally.
• Historically causing localized outbreaks, CHIKV now presents with large-scale epidemics and autochthonous transmission in new regions.

Purpose of the Study:

• To review the evolving epidemiology and clinical manifestations of Chikungunya virus.
• To highlight insights into CHIKV pathogenesis, including viral mutations and persistence.
• To discuss the long-term sequelae and public health implications of CHIKV emergence.

Main Methods:

• Literature review of CHIKV outbreaks, pathogenesis, and clinical outcomes.
• Analysis of epidemiological data and clinical case follow-ups.
• Examination of molecular factors influencing CHIKV transmission and persistence.

Main Results:

• The A226V mutation enhances CHIKV fitness in Aedes albopictus, facilitating spread.
• CHIKV can persist in deep tissue sanctuaries for months post-infection.
• Acute illness presents with high symptomatic rates, complications, and mother-to-child transmission.
• Long-term sequelae include chronic rheumatic disorders and mood changes, impacting quality of life.

Conclusions:

• The globalization of CHIKV poses a significant threat, leading to severe acute episodes and chronic debilitating conditions.
• Countries with Aedes mosquito populations are increasingly vulnerable to CHIKV outbreaks and endemic persistence.
• Effective mosquito control and enhanced public health surveillance are crucial for managing CHIKV.