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KMID : 0383820150780030246
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Tuberculosis and Respiratory Diseases
2015 Volume.78 No. 3 p.246 ~ p.252
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Tuberculosis in Mexico and the USA, Comparison of Trends Over Time 1990?2010
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Eduardo Hernandez-Garduno
Fabiola Mendoza-Damian
Adriana Garduno-Alanis
Salvador Ayon-Garibaldo
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Abstract
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Background : The aim was to compare tuberculosis trends in Mexico and United States and to evaluate Mexican diagnostic methods and contact investigation.
Materials and Methods : Retrospective comparative study of tuberculosis cases and incidence rates between both countries (1990?2010). Diagnostic methods and contact investigations were also evaluated for Mexico. Estimates were obtained from official websites.
Results : In Mexico, no clear trend was found over time for cases. Pulmonary (PTB) and all forms of tuberculosis (AFTB) incidence decreased 2.0% annually. There was a negative correlation between the mean contacts examined per case and AFTB incidence (r2=?0.44, p=0.01) with a 33% reduction in AFTB incidence. In United States, PTB and AFTB cases have been decreasing 6.0% and 5.6% annually, respectively. The incidence decreased 7.3% and 6.8%, respectively.
Conclusion : The incidence of tuberculosis in Mexico is decreasing slightly over time at 2% annually. In the United States, cases and incidence rates have been decreasing at a higher rate (5% to 7% annually). The inverse association between number of contacts examined per state and incidence rates in Mexico underscore the importance of reinforcing and improving contact investigations with the likely translation of a decrease of TB incidence at a higher rate.
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KEYWORD
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Tuberculosis, Incidence, Trend
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