First Molecular Identification of Rickettsia aeschlimannii and Rickettsia africae in Ticks from Ghana.
Am J Trop Med Hyg
; 110(3): 491-496, 2024 Mar 06.
Article
em En
| MEDLINE
| ID: mdl-38295420
ABSTRACT
The threats from vector-borne pathogens transmitted by ticks place people (including deployed troops) at increased risk for infection, frequently contributing to undifferentiated febrile illness syndromes. Wild and domesticated animals are critical to the transmission cycle of many tick-borne diseases. Livestock can be infected by ticks, and serve as hosts to tick-borne diseases such as rickettsiosis. Thus, it is necessary to identify the tick species and determine their potential to transmit pathogens. A total of 1,493 adult ticks from three genera-Amblyomma, Hyalomma, and Rhipicephalus-were identified using available morphological keys and were pooled (n = 541) by sex and species. Rickettsia species were detected in 308 of 541 (56.9%) pools by genus-specific quantitative polymerase chain reaction assay (Rick17b). Furthermore, sequencing of the outer membrane protein A and B genes (ompA and ompB) of random samples of Rickettsia-positive samples led to the identification of Rickettsia aeschlimannii and Rickettsia africae with most R. africae DNA (80.2%) detected in pools of Amblyomma variegatum. We report the first molecular detection and identification of the rickettsial pathogens R. africae and R. aeschlimannii in ticks from Ghana. Our findings suggest there is a need to use control measures to prevent infections from occurring among human populations in endemic areas in Ghana. This study underscores the importance of determining which vector-borne pathogens are in circulation in Ghana. Further clinical and prevalence studies are needed to understand more comprehensively the clinical impact of these rickettsial pathogens contributing to human disease and morbidity in Ghana.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Rickettsia
/
Carrapatos
/
Doenças Transmitidas por Carrapatos
/
Ixodidae
Tipo de estudo:
Diagnostic_studies
/
Prognostic_studies
/
Risk_factors_studies
Limite:
Adult
/
Animals
/
Humans
País/Região como assunto:
Africa
Idioma:
En
Revista:
Am J Trop Med Hyg
Ano de publicação:
2024
Tipo de documento:
Article
País de afiliação:
Gana