Rickettsia rickettsii Co-feeding Transmission among Amblyomma aureolatum Ticks
Amblyomma aureolatum ticks are vectors of Rickettsia rickettsii, the etiologic agent of Rocky Mountain spotted fever in Brazil. Maintenance of R. rickettsii in nature depends on horizontal transmission along tick generations. Although such transmission is known to occur when uninfected and infected...
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Centers for Disease Control and Prevention
2018-11-01
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doaj-4d4d913ed1a94a1d95ddc3d539080a512020-11-25T00:31:04ZengCenters for Disease Control and PreventionEmerging Infectious Diseases1080-60401080-60592018-11-0124112041204810.3201/eid2411.180451Rickettsia rickettsii Co-feeding Transmission among Amblyomma aureolatum TicksJonas Moraes-FilhoFrancisco B. CostaMonize GerardiHerbert S. SoaresMarcelo B. LabrunaAmblyomma aureolatum ticks are vectors of Rickettsia rickettsii, the etiologic agent of Rocky Mountain spotted fever in Brazil. Maintenance of R. rickettsii in nature depends on horizontal transmission along tick generations. Although such transmission is known to occur when uninfected and infected ticks feed simultaneously on susceptible animals (co-feeding systemic transmission), we investigated co-feeding nonsystemic transmission, which was based on R. rickettsii–infected and –uninfected A. aureolatum ticks feeding simultaneously on guinea pigs immune to R. rickettsii. Our acquisition and transmission infestations demonstrated that horizontal transmission of R. rickettsii by co-feeding ticks on immune hosts with no systemic infection did not occur when uninfected larvae fed distantly from infected nymphs but did occur in a few cases when uninfected larvae fed side-by-side with infected nymphs, suggesting that they shared the same feeding site. The co-feeding nonsystemic transmission type might have no epidemiologic importance for Rocky Mountain spotted fever.https://wwwnc.cdc.gov/eid/article/24/11/18-0451_articleRickettsia rickettsiiAmblyomma aureolatumRocky Mountain spotted fevercofeedingBrazilvector-borne infections |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jonas Moraes-Filho Francisco B. Costa Monize Gerardi Herbert S. Soares Marcelo B. Labruna |
spellingShingle |
Jonas Moraes-Filho Francisco B. Costa Monize Gerardi Herbert S. Soares Marcelo B. Labruna Rickettsia rickettsii Co-feeding Transmission among Amblyomma aureolatum Ticks Emerging Infectious Diseases Rickettsia rickettsii Amblyomma aureolatum Rocky Mountain spotted fever cofeeding Brazil vector-borne infections |
author_facet |
Jonas Moraes-Filho Francisco B. Costa Monize Gerardi Herbert S. Soares Marcelo B. Labruna |
author_sort |
Jonas Moraes-Filho |
title |
Rickettsia rickettsii Co-feeding Transmission among Amblyomma aureolatum Ticks |
title_short |
Rickettsia rickettsii Co-feeding Transmission among Amblyomma aureolatum Ticks |
title_full |
Rickettsia rickettsii Co-feeding Transmission among Amblyomma aureolatum Ticks |
title_fullStr |
Rickettsia rickettsii Co-feeding Transmission among Amblyomma aureolatum Ticks |
title_full_unstemmed |
Rickettsia rickettsii Co-feeding Transmission among Amblyomma aureolatum Ticks |
title_sort |
rickettsia rickettsii co-feeding transmission among amblyomma aureolatum ticks |
publisher |
Centers for Disease Control and Prevention |
series |
Emerging Infectious Diseases |
issn |
1080-6040 1080-6059 |
publishDate |
2018-11-01 |
description |
Amblyomma aureolatum ticks are vectors of Rickettsia rickettsii, the etiologic agent of Rocky Mountain spotted fever in Brazil. Maintenance of R. rickettsii in nature depends on horizontal transmission along tick generations. Although such transmission is known to occur when uninfected and infected ticks feed simultaneously on susceptible animals (co-feeding systemic transmission), we investigated co-feeding nonsystemic transmission, which was based on R. rickettsii–infected and –uninfected A. aureolatum ticks feeding simultaneously on guinea pigs immune to R. rickettsii. Our acquisition and transmission infestations demonstrated that horizontal transmission of R. rickettsii by co-feeding ticks on immune hosts with no systemic infection did not occur when uninfected larvae fed distantly from infected nymphs but did occur in a few cases when uninfected larvae fed side-by-side with infected nymphs, suggesting that they shared the same feeding site. The co-feeding nonsystemic transmission type might have no epidemiologic importance for Rocky Mountain spotted fever. |
topic |
Rickettsia rickettsii Amblyomma aureolatum Rocky Mountain spotted fever cofeeding Brazil vector-borne infections |
url |
https://wwwnc.cdc.gov/eid/article/24/11/18-0451_article |
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