Abstract:
:Ixodes scapularis is responsible for the transmission of a variety of pathogens in North America, including Borrelia burgdorferi sensu stricto, Anaplasma phagocytophilum and Babesia microti. Songbirds have previously been described as agents of tick dispersal, and a combination of empirical data and modeling efforts have implicated songbirds in the range expansion of I. scapularis northward into Canada during spring bird migration. The role of fall bird migration has received comparatively less attention, particularly at a continental scale. The aim of the current research was to use a novel individual-based modeling approach (IBM) to investigate the role of southward migrating songbirds in the dispersal of I. scapularis within the continental United States. The IBM used in this research explicitly models dispersal by two extensively studied migrating songbird species, wood thrush Hylocichla mustelina and ovenbird Seiurus aurocapillus. Our IBM predicts the annual dispersal of more than four million ticks by H. mustelina and S. aurocapillus, notably into areas as far west as the Dakotas, and as far south as Central Alabama. Predicted dispersal locations include areas where the southern phenotype of I. scapularis dominates, suggestive of a possible mechanism for previously described unidirectional gene flow from north to south. In addition, the model demonstrates that three species-specific songbird traits - breeding range, migration timing, and propensity for tick attachment - each play a major role in the relative magnitude of tick dispersal by different songbird species. The pattern of I. scapularis dispersal predicted by this model suggests that migrating songbirds may have contributed to the range expansion of the tick historically, and may continue to do so presently and into the future, particularly as climate changes the geographic areas that are suitable for I. scapularis. Ultimately, widespread tick dispersal by migrating songbirds likely increases the human risk of Lyme disease and other tick-borne diseases in the United States.
journal_name
Ticks Tick Borne Disjournal_title
Ticks and tick-borne diseasesauthors
Tonelli BA,Dearborn DCdoi
10.1016/j.ttbdis.2019.05.012subject
Has Abstractpub_date
2019-08-01 00:00:00pages
1096-1104issue
5eissn
1877-959Xissn
1877-9603pii
S1877-959X(18)30263-2journal_volume
10pub_type
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journal_title:Ticks and tick-borne diseases
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journal_title:Ticks and tick-borne diseases
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journal_title:Ticks and tick-borne diseases
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journal_title:Ticks and tick-borne diseases
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journal_title:Ticks and tick-borne diseases
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journal_title:Ticks and tick-borne diseases
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journal_title:Ticks and tick-borne diseases
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journal_title:Ticks and tick-borne diseases
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journal_title:Ticks and tick-borne diseases
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journal_title:Ticks and tick-borne diseases
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journal_title:Ticks and tick-borne diseases
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journal_title:Ticks and tick-borne diseases
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journal_title:Ticks and tick-borne diseases
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journal_title:Ticks and tick-borne diseases
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journal_title:Ticks and tick-borne diseases
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journal_title:Ticks and tick-borne diseases
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journal_title:Ticks and tick-borne diseases
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doi:10.1016/j.ttbdis.2019.01.008
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abstract::In this study, we examine the current pattern of tick diversity and host use in French Guiana, South America, from 97 sampling localities encompassing peri-urban, rural and natural habitats. We collected 3395 ticks, including 1485 specimens from 45 vertebrate species (humans, domestic and wild animals) and 1910 questi...
journal_title:Ticks and tick-borne diseases
pub_type: 杂志文章
doi:10.1016/j.ttbdis.2018.09.003
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