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Pertussis prevalence and its determinants among children with persistent cough in urban Uganda. | LitMetric

Background: We determined prevalence of pertussis infection and its associated host and environmental factors to generate information that would guide strategies for disease control.

Methods: In a cross-sectional study, 449 children aged 3 months to 12 years with persistent cough lasting ≥14 days were enrolled and evaluated for pertussis using DNA polymerase chain reaction (PCR) and ELISA serology tests.

Results: Pertussis prevalence was 67 (15% (95% Confidence Interval (CI): 12-18)) and 81 (20% (95% CI: 16-24)) by PCR and ELISA, respectively among 449 participating children. The prevalence was highest in children with >59 months of age despite high vaccination coverage of 94% in this age group. Study demographic and clinical characteristics were similar between pertussis and non-pertussis cases. Of the 449 children, 133 (30%) had a coughing household member and 316 (70%) did not. Among 133 children that had a coughing household member, sex of child, sharing bed with a coughing household member and having a coughing individual in the neighborhood were factors associated with pertussis. Children that had shared a bed with a coughing household individual had seven-fold likelihood of having pertussis compared to children that did not (odds ratio (OR) 7.16 (95% CI: 1.24-41.44)). Among the 316 children that did not have a coughing household member, age <23 months, having or contact with a coughing individual in neighborhood, a residence with one room, and having a caretaker with >40 years of age were the factors associated with pertussis. Age <23months was three times more likely to be associated with pertussis compared to age 24-59 months (OR 2.97 (95% CI: 1.07-8.28)).

Conclusion: Findings suggest high prevalence of pertussis among children with persistent cough at a health facility and it was marked in children >59 months of age, suggesting the possibility of waning immunity. The factors associated with pertussis varied by presence or absence of a coughing household member.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4398436PMC
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0123240PLOS

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