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© Research
Publication : PLoS neglected tropical diseases

Adequate wound care and use of bed nets as protective factors against Buruli Ulcer: results from a case control study in Cameroon

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in PLoS neglected tropical diseases - 08 Nov 2011

Landier J, Boisier P, Fotso Piam F, Noumen-Djeunga B, Simé J, Wantong FG, Marsollier L, Fontanet A, Eyangoh S

Link to Pubmed [PMID] – 22087346

PLoS Negl Trop Dis 2011 Nov;5(11):e1392

BACKGROUND: Buruli ulcer is an infectious disease involving the skin, caused by Mycobacterium ulcerans. Its exact transmission mechanism remains unknown. Several arguments indicate a possible role for insects in its transmission. A previous case-control study in the Nyong valley region in central Cameroon showed an unexpected association between bed net use and protection against Buruli ulcer. We investigated whether this association persisted in a newly discovered endemic Buruli ulcer focus in Bankim, northwestern Cameroon.

METHODOLOGY/PRINCIPAL FINDINGS: We conducted a case-control study on 77 Buruli ulcer cases and 153 age-, gender- and village-matched controls. Participants were interviewed about their activities and habits. Multivariate conditional logistic regression analysis identified systematic use of a bed net (Odds-Ratio (OR) = 0.4, 95% Confidence Interval [95%CI] = [0.2-0.9], p-value (p) = 0.04), cleansing wounds with soap (OR [95%CI] = 0.1 [0.03-0.3], p<0.0001) and growing cassava (OR [95%CI] = 0.3 [0.2-0.7], p = 0.005) as independent protective factors. Independent risk factors were bathing in the Mbam River (OR [95%CI] = 6.9 [1.4-35], p = 0.02) and reporting scratch lesions after insect bites (OR [95%CI] = 2.7 [1.4-5.4], p = 0.004). The proportion of cases that could be prevented by systematic bed net use was 32%, and by adequate wound care was 34%.

CONCLUSIONS/SIGNIFICANCE: Our study confirms that two previously identified factors, adequate wound care and bed net use, significantly decreased the risk of Buruli ulcer. These associations withstand generalization to different geographic, climatic and epidemiologic settings. Involvement of insects in the household environment, and the relationship between wound hygiene and M. ulcerans infection should now be investigated.

http://www.ncbi.nlm.nih.gov/pubmed/22087346