Abstract
We conducted a retrospective review of California tuberculosis (TB) registry and genotyping data to evaluate trends, analyze epidemiologic differences between adult and child case-patients with Mycobacterium bovis disease, and identify risk factors for M. bovis disease. The percentage of TB cases attributable to M. bovis increased from 3.4% (80/2,384) in 2003 to 5.4% (98/1,808) in 2011 (p = 0.002). All (6/6) child case-patients with M. bovis disease during 2010-2011 had >1 parent/guardian who was born in Mexico, compared with 38% (22/58) of child case-patients with M. tuberculosis disease (p = 0.005). Multivariate analysis of TB case-patients showed Hispanic ethnicity, extrapulmonary disease, diabetes, and immunosuppressive conditions, excluding HIV co-infection, were independently associated with M. bovis disease. Prevention efforts should focus on Hispanic binational families and adults with immunosuppressive conditions. Collection of additional risk factors in the national TB surveillance system and expansion of whole-genome sequencing should be considered.
Highlights
This activity has been planned and implemented in accordance with the Essential Areas and policies of the Accreditation Council for Continuing Medical Education through the joint providership of Medscape, LLC and Emerging Infectious Diseases
The highest cumulative incidence of human M. bovis disease occurred in lower southern California (Figure 2)
In the non-Hispanic Asian population, 92% (61/66) of pyrazinamide-monoresistant isolates were genotyped as M. tuberculosis. In this large population-based epidemiologic study of M. bovis disease in California, we observed an increase in the annual percentage of TB cases attributable to M. bovis from 2003 through 2011
Summary
This activity has been planned and implemented in accordance with the Essential Areas and policies of the Accreditation Council for Continuing Medical Education through the joint providership of Medscape, LLC and Emerging Infectious Diseases. LLC is accredited by the ACCME to provide continuing medical education for physicians. LLC designates this Journal-based CME activity for a maximum of 1.0 AMA PRA Category 1 Credit(s)TM. All other clinicians completing this activity will be issued a certificate of participation. To participate in this journal CME activity: (1) review the learning objectives and author disclosures; (2) study the education content; (3) take the post-test with a 75% minimum passing score and complete the evaluation at http://www.medscape.org/journal/eid; (4) view/print certificate. CME Editor Claudia Chesley, Technical Writer/Editor, Emerging Infectious Diseases.
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