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Host associations, biogeography, and phylogenetics of avian malaria in southern African waterfowl

Published online by Cambridge University Press:  12 October 2012

GRAEME S. CUMMING ,
ERIC SHEPARD ,
SHARON OKANGA ,
ALEXANDRE CARON ,
MDUDUZI NDLOVU  and
JEFFREY L. PETERS
GRAEME S. CUMMING*
Affiliation:
Percy FitzPatrick Institute, DST/NRF Centre of Excellence, University of Cape Town, Rondebosch, Cape Town 7701, South Africa
ERIC SHEPARD
Affiliation:
Department of Biological Sciences, 3640 Colonel Glenn Highway, Wright State University, Dayton, OH 45435, USA
SHARON OKANGA
Affiliation:
Percy FitzPatrick Institute, DST/NRF Centre of Excellence, University of Cape Town, Rondebosch, Cape Town 7701, South Africa
ALEXANDRE CARON
Affiliation:
Cirad, UPR AGIRs, Harare, Zimbabwe Cirad, UPR AGIRs, Montpellier, France
MDUDUZI NDLOVU
Affiliation:
Percy FitzPatrick Institute, DST/NRF Centre of Excellence, University of Cape Town, Rondebosch, Cape Town 7701, South Africa
JEFFREY L. PETERS
Affiliation:
Department of Biological Sciences, 3640 Colonel Glenn Highway, Wright State University, Dayton, OH 45435, USA
*
*Corresponding author: Percy FitzPatrick Institute, DST/NRF Centre of Excellence, University of Cape Town, Rondebosch, Cape Town 7701, South Africa. E-mail: [email protected]
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Summary

The relevance of spatial variation in the environment and host communities for parasite community composition is poorly documented, creating a need for additional case studies from which general principles can be developed. Avian malaria in southern African waterfowl has not previously been studied. As a first step towards documenting and understanding its biogeography, we used PCR and molecular sequencing techniques to analyse 454 blood samples from Afrotropical ducks from 5 different locations (spread around the subregion) for avian malaria. Fifty-five blood samples were positive for one or more genera of haematozoa. The regional infection rate across all sites and sampling periods was 12·1%. Nine individuals carried dual infections containing multiple haematozoa. Fifteen different cytochrome b haplotypes among 52 positives (3 samples failed to sequence) and 61 total sequences were found. Eleven haplotypes closely matched Plasmodium, whereas 4 were more similar to Haemoproteus. Five distinct haematozoan clades were identified. Haemoproteus parasites appeared to be more host-specific than Plasmodium, which occurred at every sampling location and in every host species examined. There were no significant differences in overall parasite prevalence attributable to either site or species, although Plasmodium and Haemoproteus occurrences differed by site-species combination and the borderline significance of our test for between-site variation (P < 0·06) implied that with a larger sample size, differences in parasite prevalence among locations might be detectable.

Keywords

malariawaterfowlsouthern Africaparasitepathogenevolutionbiogeographyecology
Type
Research Article
Information
Parasitology , Volume 140 , Issue 2 , February 2013 , pp. 193 - 201
Copyright
Copyright © Cambridge University Press 2012

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