Moreira Rafaela, Moreira Guilherme, Hemnani Mahima, do Nascimento Carlos Augusto Rodrigues, Gianizella Sergio Luís, Mesquita João Rodrigo, Barradas Patrícia Ferreira
ICBAS-School of Medicine and Biomedical Sciences, Porto University, 4050-313 Porto, Portugal.
Laboratório de Biologia Celular e Helmintologia 'Profa Dra Reinalda Marisa Lanfredi', Instituto de Ciências Biológicas, Universidade Federal do Pará, Guamá, Belém 66075-110, PA, Brazil.
Animals (Basel). 2025 Sep 9;15(18):2645. doi: 10.3390/ani15182645.
In the Brazilian Amazon biome, there has been a rise in human spotted fever cases, but still significant knowledge gaps regarding the diversity and epidemiology of the tick-host- relationship. In the herein study, rickettsiae were investigated in ticks from captured live wild hosts in the Amazon biome by PCR targeting a partial sequence of B and A genes. All 343 ticks were morphologically identified as belonging to five species of the genus . ( = 24, 7%) were collected from a and a . ( = 51, 15%) were collected from two . ( = 116, 34%) were collected from three . ( = 131, 38%) were collected from two . ( = 21, 6%) were collected from a spp. Four ticks (one female and three males) collected from a three-toed sloth () in 2015 were found to be positive for strain Atlantic Rainforest. The molecular findings herein have confirmed that spotted fever may occur in the Amazon Rainforest associated with , expanding the geographical distribution of the strain to the Central Amazon Rainforest.
在巴西亚马逊生物群落中，人类斑点热病例有所增加，但关于蜱-宿主关系的多样性和流行病学仍存在重大知识空白。在本研究中，通过针对B和A基因部分序列的PCR，对从亚马逊生物群落中捕获的野生宿主身上采集的蜱中的立克次氏体进行了调查。所有343只蜱在形态上被鉴定为属于该属的五个物种。（=24，7%）是从一只 和一只 身上采集的。（=51，15%）是从两只 身上采集的。（=116，34%）是从三只 身上采集的。（=131，38%）是从两只 身上采集的。（=21，6%）是从一只 属物种身上采集的。2015年从一只三趾树懒（ ）身上采集的四只蜱（一只雌性和三只雄性）被发现对大西洋雨林菌株呈阳性。本文的分子研究结果证实，斑点热可能发生在与 相关的亚马逊雨林中，将该菌株的地理分布扩展到了亚马逊中部雨林。
