Outbreak of swine-origin influenza A (H1N1) virus infection - Mexico, March-April 2009

MMWR Morb Mortal Wkly Rep. 2009 May 8;58(17):467-70.

Abstract

In March and early April 2009, Mexico experienced outbreaks of respiratory illness and increased reports of patients with influenza-like illness (ILI) in several areas of the country. On April 12, the General Directorate of Epidemiology (DGE) reported an outbreak of ILI in a small community in the state of Veracruz to the Pan American Health Organization (PAHO) in accordance with International Health Regulations. On April 17, a case of atypical pneumonia in Oaxaca State prompted enhanced surveillance throughout Mexico. On April 23, several cases of severe respiratory illness laboratory confirmed as swine-origin influenza A (H1N1) virus (S-OIV) infection were communicated to the PAHO. Sequence analysis revealed that the patients were infected with the same S-OIV strain detected in two children residing in California. This report describes the initial and ongoing investigation of the S-OIV outbreak in Mexico.

MeSH terms

  • Adolescent
  • Adult
  • Child
  • Child, Preschool
  • Disease Outbreaks*
  • Female
  • Hospitals / statistics & numerical data
  • Humans
  • Infant
  • Infection Control / methods
  • Influenza A Virus, H1N1 Subtype*
  • Influenza, Human / complications
  • Influenza, Human / diagnosis
  • Influenza, Human / epidemiology*
  • Influenza, Human / prevention & control
  • Male
  • Mexico / epidemiology
  • Middle Aged
  • Population Surveillance / methods*