Delineating Anaplasma phagocytophilum Ecotypes in Coexisting, Discrete Enzootic Cycles

The emerging tick-borne pathogen Anaplasma phagocytophilum is under increasing scrutiny for the existence of subpopulations that are adapted to different natural cycles. Here, we characterized the diversity of A. phagocytophilum genotypes circulating in a natural system that includes multiple hosts...

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Main Authors: Kevin J. Bown, Xavier Lambin, Nicholas H. Ogden, Michael Begon, Gill Telford, Zerai Woldehiwet, Richard J. Birtles
Format: Article
Language:English
Published: Centers for Disease Control and Prevention 2009-12-01
Series:Emerging Infectious Diseases
Subjects:
Online Access:https://wwwnc.cdc.gov/eid/article/15/12/09-0178_article
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author Kevin J. Bown
Xavier Lambin
Nicholas H. Ogden
Michael Begon
Gill Telford
Zerai Woldehiwet
Richard J. Birtles
author_facet Kevin J. Bown
Xavier Lambin
Nicholas H. Ogden
Michael Begon
Gill Telford
Zerai Woldehiwet
Richard J. Birtles
author_sort Kevin J. Bown
collection DOAJ
description The emerging tick-borne pathogen Anaplasma phagocytophilum is under increasing scrutiny for the existence of subpopulations that are adapted to different natural cycles. Here, we characterized the diversity of A. phagocytophilum genotypes circulating in a natural system that includes multiple hosts and at least 2 tick species, Ixodes ricinus and the small mammal specialist I. trianguliceps. We encountered numerous genotypes, but only 1 in rodents, with the remainder limited to deer and host-seeking I. ricinus ticks. The absence of the rodent-associated genotype from host-seeking I. ricinus ticks was notable because we demonstrated that rodents fed a large proportion of the I. ricinus larval population and that these larvae were abundant when infections caused by the rodent-associated genotype were prevalent. These observations are consistent with the conclusion that genotypically distinct subpopulations of A. phagocytophilum are restricted to coexisting but separate enzootic cycles and suggest that this restriction may result from specific vector compatibility.
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spelling doaj.art-a25cb784406642ad975b1db664d35dc72022-12-22T03:09:08ZengCenters for Disease Control and PreventionEmerging Infectious Diseases1080-60401080-60592009-12-0115121948195410.3201/eid1512.090178Delineating Anaplasma phagocytophilum Ecotypes in Coexisting, Discrete Enzootic CyclesKevin J. BownXavier LambinNicholas H. OgdenMichael BegonGill TelfordZerai WoldehiwetRichard J. BirtlesThe emerging tick-borne pathogen Anaplasma phagocytophilum is under increasing scrutiny for the existence of subpopulations that are adapted to different natural cycles. Here, we characterized the diversity of A. phagocytophilum genotypes circulating in a natural system that includes multiple hosts and at least 2 tick species, Ixodes ricinus and the small mammal specialist I. trianguliceps. We encountered numerous genotypes, but only 1 in rodents, with the remainder limited to deer and host-seeking I. ricinus ticks. The absence of the rodent-associated genotype from host-seeking I. ricinus ticks was notable because we demonstrated that rodents fed a large proportion of the I. ricinus larval population and that these larvae were abundant when infections caused by the rodent-associated genotype were prevalent. These observations are consistent with the conclusion that genotypically distinct subpopulations of A. phagocytophilum are restricted to coexisting but separate enzootic cycles and suggest that this restriction may result from specific vector compatibility.https://wwwnc.cdc.gov/eid/article/15/12/09-0178_articleBacteriaanaplasmavector-borne infectionsticksarthropod vectorsinfectious disease reservoirs
spellingShingle Kevin J. Bown
Xavier Lambin
Nicholas H. Ogden
Michael Begon
Gill Telford
Zerai Woldehiwet
Richard J. Birtles
Delineating Anaplasma phagocytophilum Ecotypes in Coexisting, Discrete Enzootic Cycles
Emerging Infectious Diseases
Bacteria
anaplasma
vector-borne infections
ticks
arthropod vectors
infectious disease reservoirs
title Delineating Anaplasma phagocytophilum Ecotypes in Coexisting, Discrete Enzootic Cycles
title_full Delineating Anaplasma phagocytophilum Ecotypes in Coexisting, Discrete Enzootic Cycles
title_fullStr Delineating Anaplasma phagocytophilum Ecotypes in Coexisting, Discrete Enzootic Cycles
title_full_unstemmed Delineating Anaplasma phagocytophilum Ecotypes in Coexisting, Discrete Enzootic Cycles
title_short Delineating Anaplasma phagocytophilum Ecotypes in Coexisting, Discrete Enzootic Cycles
title_sort delineating anaplasma phagocytophilum ecotypes in coexisting discrete enzootic cycles
topic Bacteria
anaplasma
vector-borne infections
ticks
arthropod vectors
infectious disease reservoirs
url https://wwwnc.cdc.gov/eid/article/15/12/09-0178_article
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