Patterns of Midichloria infection in avian-borne African ticks and their trans-Saharan migratory hosts

Parasites & Vectors
Irene Di LecceDiego Rubolini

Abstract

Ticks are obligate haematophagous ectoparasites of vertebrates and frequently parasitize avian species that can carry them across continents during their long-distance migrations. Ticks may have detrimental effects on the health state of their avian hosts, which can be either directly caused by blood-draining or mediated by microbial pathogens transmitted during the blood meal. Indeed, ticks host complex microbial communities, including bacterial pathogens and symbionts. Midichloria bacteria (Rickettsiales) are widespread tick endosymbionts that can be transmitted to vertebrate hosts during the tick bite, inducing an antibody response. Their actual role as infectious/pathogenic agents is, however, unclear. We screened for Midichloria DNA African ticks and blood samples collected from trans-Saharan migratory songbirds at their arrival in Europe during spring migration. Tick infestation rate was 5.7%, with most ticks belonging to the Hyalomma marginatum species complex. Over 90% of Hyalomma ticks harboured DNA of Midichloria bacteria belonging to the monophylum associated with ticks. Midichloria DNA was detected in 43% of blood samples of avian hosts. Tick-infested adult birds were significantly more likely to test positive to th...Continue Reading

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Citations

Mar 19, 2020·Cellular Microbiology·Fabrizia StavruDavide Sassera
May 3, 2020·Proceedings of the National Academy of Sciences of the United States of America·Stephanie J PeacockPéter K Molnár

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Datasets Mentioned

BETA
KY674395.1
AM181354.1
LT898326.1

Methods Mentioned

BETA
PCR

Software Mentioned

REML
MUSCLE
BLAST
SAS®
PhyML

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