Avian influenza in Mexico

Area of Science:

• Veterinary Medicine
• Epidemiology
• Animal Health

Background:

• The 1994 highly pathogenic avian influenza (HPAI) H5N2 outbreak in Mexico necessitated enhanced biosecurity and poultry production improvements.
• Previous control measures were insufficient to prevent widespread disease transmission.

Purpose of the Study:

• To outline the comprehensive control and eradication strategies implemented in response to the HPAI H5N2 outbreak in Mexico.
• To evaluate the effectiveness of integrated disease management approaches, including vaccination.

Main Methods:

• Active surveillance and disease detection protocols were established.
• Depopulation of infected farms and epidemiological investigations to prevent further spread.
• Implementation of stringent biosecurity measures and movement restrictions for poultry and related products.
• A large-scale vaccination program was introduced in affected commercial poultry areas.

Main Results:

• Eradication of highly pathogenic avian influenza (HPAI) was achieved in a relatively short period.
• The combined strategies of surveillance, biosecurity, and vaccination proved effective.
• Significant improvements in intensive poultry production systems and biosecurity were noted.

Conclusions:

• Integrated disease control strategies, particularly vaccination, are crucial for HPAI eradication in poultry.
• Enhanced biosecurity and surveillance are essential components of effective avian influenza management.
• Mexico's response demonstrated a successful model for controlling HPAI outbreaks in high-density poultry regions.