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Centro de Investigaciones Regionales Dr. Hideyo Noguchi, Universidad Autónoma de Yucatán

2012, Number 2

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Rev Biomed 2012; 23 (2)

Epidemiologic study of human influenza A(H1N1)pdm09 virus in Yucatan, Southern Mexico

Ayora-Talavera G, Betancourt-Cravioto M, Gómez-Carballo J, Conde-Ferráez L, González-Losa R, Manrique-Saide P, Sánchez EC, Quijano-Vivas Á

Language: English
References: 15
Page: 39-46
PDF size: 502.20 Kb.


ABSTRACT

Objective. To describe the seasonal pattern and regional distribution of influenza A(H1N1)pdm09 virus within this subtropical region of Mexico.
Materials and Methods. Clinical and epidemiological data were analyzed from a database provided by the Ministry of Health. Influenza virus A(H1N1)pdm09 detections were performed according to CDC protocols.
Results. The A(H1N1)pdm09 virus was detected in 53% of suspected cases. Young individuals between 5-29 years old were the most affected, with 76 % positives. At the regional level, most of the cases (83%) were confined to two municipalities, Merida the state capital, and Valladolid. In the Yucatan outbreak, the A(H1N1) pdm09 virus was the predominant strain, however, influenza A H3 remained in circulation
Conclusion. We described the epidemiological analyses of Influenza A(H1N1)pdm09 in the subtropical region of Yucatan. Our study shows that the influenza A(H1N1)pdm09 virus behaved in a distinct pattern from that observed in the rest of the Mexican territory. No differences in clinical manifestations were observed according to reports from all other locations. We found that fatal outcomes were more common in the age range of 25-29 year olds, differing from the national case-fatality ratio.


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