Int J Health Geogr - Ecological niche modelling of Hemipteran insects in Cameroon; the paradox of a vector-borne transmission for Mycobacterium ulcerans, the causative agent of Buruli ulcer.

Tópicos

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Resumo

CKGROUND: The mode of transmission of the emerging neglected disease Buruli ulcer is unknown. Several potential transmission pathways have been proposed, such as amoebae, or transmission through food webs. Several lines of evidence have suggested that biting aquatic insects, Naucoridae and Belostomatidae, may act as vectors, however this proposal remains controversial.MATERIALS AND METHODS: Herein, based on sampling in Cameroon, we construct an ecological niche model of these insects to describe their spatial distribution. We predict their distribution across West Africa, describe important environmental drivers of their abundance, and examine the correlation between their abundance and Buruli ulcer prevalence in the context of the Bradford-Hill guidelines.RESULTS: We find a significant positive correlation between the abundance of the insects and the prevalence of Buruli ulcer. This correlation changes in space and time, it is significant in one Camerounese study region in (Akonolinga) and not other (Bankim). We discuss notable environmental differences between these regions.CONCLUSION: We interpret the presence of, and change in, this correlation as evidence (though not proof) that these insects may be locally important in the environmental persistence, or transmission, of Mycobacterium. ulcerans. This is consistent with the idea of M. ulcerans as a pathogen transmitted by multiple modes of infection, the importance of any one pathway changing from region to region, depending on the local environmental conditions.

Resumo Limpo

ckground mode transmiss emerg neglect diseas buruli ulcer unknown sever potenti transmiss pathway propos amoeba transmiss food web sever line evid suggest bite aquat insect naucorida belostomatida may act vector howev propos remain controversialmateri method herein base sampl cameroon construct ecolog nich model insect describ spatial distribut predict distribut across west africa describ import environment driver abund examin correl abund buruli ulcer preval context bradfordhil guidelinesresult find signific posit correl abund insect preval buruli ulcer correl chang space time signific one camerounes studi region akonolinga bankim discuss notabl environment differ regionsconclus interpret presenc chang correl evid though proof insect may local import environment persist transmiss mycobacterium ulceran consist idea m ulceran pathogen transmit multipl mode infect import one pathway chang region region depend local environment condit

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