RSV-associated hospitalizations in Alaska Native infants

Area of Science:

• Pediatric Infectious Diseases
• Epidemiology
• Public Health

Background:

• Previous retrospective data indicated high rates of respiratory syncytial virus (RSV)-associated hospitalizations in Alaska Native children.
• The precise epidemiology of RSV infections in this population remained poorly understood.

Purpose of the Study:

• To conduct a prospective hospital-based surveillance study to determine the rates of RSV-associated hospitalizations.
• To characterize RSV epidemiology in Alaska Native children under 36 months of age in the Yukon-Kuskokwim Delta.

Main Methods:

• Prospective hospital-based surveillance.
• Data collection on RSV cases in children under 36 months from October 1993 to September 1995.
• Analysis of hospitalization rates, age distribution, disease severity, and co-circulating viruses.

Main Results:

• RSV hospitalization rates varied dramatically between study years, increasing from 53/1,000 infants in 1993-1994 to 294/1,000 infants in 1994-1995.
• A significant proportion (12%) of RSV cases occurred in infants less than one month old.
• Disease severity was notably higher in premature infants and those with congenital heart or lung conditions (p = .001).
• RSV was the predominant virus identified, with co-circulation of influenza, adenovirus, and parainfluenza.

Conclusions:

• This study highlights extreme seasonal variation and exceptionally high RSV hospitalization rates in Alaska Native children.
• Younger age and pre-existing medical conditions are associated with increased disease severity.
• RSV co-circulates with other respiratory viruses, underscoring the need for comprehensive prevention strategies.