Title
We are connected : fleahost association networks in the plague outbreak focus in the Rift Valley, northern Tanzania We are connected : fleahost association networks in the plague outbreak focus in the Rift Valley, northern Tanzania
Author
Faculty/Department
Faculty of Sciences. Biology
Publication type
article
Publication
Melbourne ,
Subject
Chemistry
Biology
Source (journal)
Wildlife research. - Melbourne
Volume/pages
42(2015) :2 , p. 196-206
ISSN
1035-3712
ISI
000361185800013
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Context: Plague is a serious health problem in northern Tanzania, with outbreaks since 2008 in two districts located in Rift Valley. There is dearth of knowledge on diversity of small mammal and flea fauna occurring in this plague focus. Knowledge on interactions between fleas and rodent species that harbour the plague bacterium, Yersinia pestis, is important for developing strategies for control and prevention of plague. Aims: This study aims to show how rodents and fleas are associated with each other in the plague focus. Methods: Animals were trapped bimonthly from 2009 to 2012 in different habitats. The fur of animals was brushed to collect fleas, which were identified and quantified. Network analysis methods, randomisation and rarefaction curves were used to show how hosts and fleas are associated. Key results: Thirteen species of rodents were associated with 26 species of fleas of which Dinopsyllus lypusus, Xenopsylla brasiliensis and X. cheopis are confirmed efficient vectors of Y. pestis. Randomisation and rarefaction curves established that Lophuromys flavopunctatus had significantly higher flea species richness (n = 9) than did all other hosts, whereas Xenopsylla cheopis and Dinopsyllus spp. showed greater host species richness than did other species of fleas. There was no significant correlation between host sex and flea abundance (χ2 = 0.8, d.f. = 6, P = 0.371), but significant differences between reproductive states (adults had more fleas than did subadults) were observed, which probably reflected typical positive correlation between size and flea abundance (χ2 = 4.1955, d.f. = 1, P = 0.040). Conclusions: The plague outbreak focus in northern Tanzania has a diverse fauna of rodents and fleas with multiple patterns of association and connectivity. Implications: Existence of diverse populations of rodents associated with a large number of flea species, some of which are efficient plague vectors, increases the potential for persistence and transmission of plague to humans in northern Tanzania.
Full text (open access)
https://repository.uantwerpen.be/docman/irua/2fa313/10442.pdf
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