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Advisor(s)
Abstract(s)
As carraças são um dos vetores mais importantes de agentes patogénicos
para o Homem, com impacto crescente em saúde pública em todo o mundo.
Os agentes infeciosos transmitidos por carraças incluem vírus, como o vírus
da encefalite transmitida por carraças e da febre hemorrágica Crimeia-Congo,
bactérias, tais como os agentes etiológicos da borreliose de Lyme, febre
escaro nodular, outras rickettsioses e anaplasmose humana e parasitas protozoários
que causam a babesiose. As doenças associadas a carraças estão
a emergir e reemergir sendo um dos principais fatores, identificado particularmente
no hemisfério norte, o alargamento da distribuição geográfica destes
artrópodes que funcionam como vetores. Em Portugal, a vigilância das
carraças e dos agentes infeciosos transmitidos é assegurada pela Rede de
Vigilância de Vetores (REVIVE). Neste artigo apresentam-se, de forma resumida,
os resultados das carraças colhidas em humanos e dos agentes etiológicos
detetados durante o ano de 2023. Nos 430 ixodídeos colhidos em
humanos não foram identificadas espécies exóticas. A pesquisa de borrélia,
rickettsia e CCHV por métodos moleculares foi efetuada em todos os
espécimes de carraça colhidos e identificados, tendo sido observada respetivamente
a prevalência anual de 6,7%, 32,8% e 0%. O REVIVE-carraças
contribui para o conhecimento da fauna de ixodídeos de Portugal e do seu
papel de vetor, representando a componente entomológica indispensável à
avaliação do risco de transmissão de doenças potencialmente graves dos
programas de vigilância epidemiológica.
Ticks are one of the most important vectors of pathogenic agents to humans, with a growing impact on public health worldwide. The infectious agents transmitted by ticks include viruses, such as the tick-borne encephalitis virus and the Crimean-Congo hemorrhagic fever virus, bacteria, such as the causative agents of Lyme borreliosis, Mediterranean spotted fever, other rickettsioses, and human anaplasmosis, and protozoan parasites that cause babesiosis. Tick-borne diseases are emerging and re-emerging, with one of the main factors, particularly identified in the northern hemisphere, being the expansion of the geographical distribution of these arthropod vectors. In Portugal, tick surveillance and monitoring of the infectious agents they transmit are ensured by the Vector Surveillance Network (REVIVE). This article briefly presents the results of ticks collected from humans and the etiological agents detected during the year 2023. No exotic species were identified among the 430 ticks collected from humans. The analysis for Borrelia, Rickettsia, and CCHV using molecular methods was carried out on all collected and identified tick specimens, with an annual prevalence of 6.7%, 32.8%, and 0%, respectively. REVIVE-ticks contribute to the knowledge of the ixodid fauna of Portugal and their role as vectors, representing the essential entomological component for assessing the risk of transmission of potentially serious diseases in epidemiological surveillance programs.
Ticks are one of the most important vectors of pathogenic agents to humans, with a growing impact on public health worldwide. The infectious agents transmitted by ticks include viruses, such as the tick-borne encephalitis virus and the Crimean-Congo hemorrhagic fever virus, bacteria, such as the causative agents of Lyme borreliosis, Mediterranean spotted fever, other rickettsioses, and human anaplasmosis, and protozoan parasites that cause babesiosis. Tick-borne diseases are emerging and re-emerging, with one of the main factors, particularly identified in the northern hemisphere, being the expansion of the geographical distribution of these arthropod vectors. In Portugal, tick surveillance and monitoring of the infectious agents they transmit are ensured by the Vector Surveillance Network (REVIVE). This article briefly presents the results of ticks collected from humans and the etiological agents detected during the year 2023. No exotic species were identified among the 430 ticks collected from humans. The analysis for Borrelia, Rickettsia, and CCHV using molecular methods was carried out on all collected and identified tick specimens, with an annual prevalence of 6.7%, 32.8%, and 0%, respectively. REVIVE-ticks contribute to the knowledge of the ixodid fauna of Portugal and their role as vectors, representing the essential entomological component for assessing the risk of transmission of potentially serious diseases in epidemiological surveillance programs.
Description
Keywords
REVIVE Rede de Vigilância de Vetores Ixodídeos Carraças Agentes Zoonóticos Doenças Transmitidas por Vectores Doenças Infecciosas Saúde Pública Portugal
Pedagogical Context
Citation
Boletim Epidemiológico Observações. 2023 mai-ago;12(34):5-9
Publisher
Instituto Nacional de Saúde Doutor Ricardo Jorge, IP
