"Candidatus Borrelia ibitipoquensis," a Borrelia valaisiana-Related Genospecies Characterized from Ixodes paranaensis in Brazil.

"Candidatus Borrelia ibitipoquensis," a Borrelia valaisiana-Related Genospecies Characterized from Ixodes paranaensis in Brazil. Microb Ecol. 2020 May 04;: Authors: Muñoz-Leal S, Ramirez DG, Luz HR, Faccini JLH, Labruna MB Abstract Borrelia burgdorferi sensu lato (Bbsl) spirochetes include the agents of Lyme borreliosis in temperate regions of the Northern Hemisphere, and merge their transmission cycles mainly with ticks of the Ixodes ricinus complex. Twenty genospecies compose Bbsl currently, and with the exception of Borrelia chilensis, and Borrelia garinii, all have been described only for North America, Europe, North Africa, and Asia. Here, we collected specimens of Ixodes paranaensis, a tick associated with swifts in a Brazilian natural park from the state of Minas Gerais, and performed a molecular characterization of 11 borrelial genes. Based on comparisons of inter and intraspecific genetic divergences, and Bayesian phylogenetic trees inferred for 16S rRNA, flaB, p66, and concatenated clpA, clpX, pepX, pyrG, recG, nifS rlpB, and uvrA genes, we demonstrate the occurrence of a new genospecies of Bbsl. "Candidatus Borrelia ibitipoquensis" Ip37 is closely related to Borrelia sp. Am501, and Borrelia valaisiana, a spirochete transmitted by ticks of the I. ricinus complex in Eurasia that uses birds as reservoirs. In a similar ecological scenario involving ticks and avian hosts, the migratory swift Streptoprocne biscutata is the...
Source: Microbial Ecology - Category: Microbiology Authors: Tags: Microb Ecol Source Type: research

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In this study, multilocus sequence typing (MLST) was employed to investigate the local population structure of B. garinii in Ixodes ricinus ticks. The study took place in a natural wetland in Slovakia, temporally encompassing spring and autumn bird migration periods as well as the breeding period of resident birds. In total, we examined 369 and 255 ticks collected from 78 birds and local vegetation, respectively. B. burgdorferi s.l. was detected in 43.4% (160/369) of ticks recovered from birds and in 26.3% (67/255) of questing ticks, respectively. Considering the ticks from bird hosts, the highest prevalence was found for ...
Source: International Journal of Environmental Research and Public Health - Category: Environmental Health Authors: Tags: Article Source Type: research
H, Heylen D Abstract Wild birds are frequently exposed to the zoonotic tick-borne bacteria Borrelia burgdorferi sensu lato (s.l.), and some bird species act as reservoirs for some Borrelia genospecies. Studying the tropism of Borrelia in the host, how it is sequestered in different organs, and whether it is maintained in circulation and/or in the host's skin is important to understand pathogenicity, infectivity to vector ticks and reservoir competency.We evaluated tissue dissemination of Borrelia in blackbirds (Turdus merula) and great tits (Parus major), naturally and experimentally infected with Borrelia genospe...
Source: Microbial Ecology - Category: Microbiology Authors: Tags: Microb Ecol Source Type: research
Publication date: Available online 10 November 2018Source: Molecular Phylogenetics and EvolutionAuthor(s): Gabriele Margos, Noémie S. Becker, Volker Fingerle, Andreas Sing, Jaime Albino Ramos, Isabel Lopes de Carvalho, Ana Claudia NorteAbstractBorrelia burgdorferi sensu lato comprises a species complex of tick-transmitted bacteria that includes the agents of human Lyme borreliosis. Borrelia turdi is a genospecies of this complex that exists in cryptic transmission cycles mainly between ornithophilic tick vectors and their avian hosts. The species has been originally discovered in avian transmission cycles in Asia bu...
Source: Molecular Phylogenetics and Evolution - Category: Molecular Biology Source Type: research
In this study, bird species migrating through Bulgaria were investigated as carriers of zoonotic pathogens. In total, 706 birds belonging to 46 species were checked for the presence of various bacterial pathogens (Campylobacter, Yersin ia, Salmonella, Listeria, Escherichia coli, Staphylococcus aureus, Francisella tularensis, Coxiella burnetii, Borrelia burgdorferi, and Brucella spp.). From 673 birds we investigated fecal samples, from the remaining 33, blood samples. We detected Campylobacter 16S rDNA gene in 1.3% of birds, but no ne were of pathogenic Campylobacter jejuni and Campylobacter coli species. Escherichia coli 1...
Source: Canadian Journal of Microbiology - Category: Microbiology Authors: Source Type: research
In this study, we used this chamber model and showed that I. scapularis ticks will not only acquire bovine blood but human and quail blood as well. The latter two are the incidental host and an avian host of Lyme borreliae, respectively. We also investigated the roles that BBA52 and Lp6.6 play in promoting spirochete survival in nymphal ticks fed on human or quail blood. After feeding on human blood, spirochete burdens in ticks infected with an lp6.6-deficient B. burgdorferi were significantly reduced, while bba52-deficient spirochete burdens in ticks remained unchanged, similar to the wild-type strain. No strain showed a ...
Source: Ticks and Tick borne Diseases - Category: Zoology Source Type: research
Publication date: Available online 16 February 2018 Source:Ticks and Tick-borne Diseases Author(s): Ana Cláudia Norte, David Costantini, Pedro Miguel Araújo, Marcel Eens, Jaime Albino Ramos, Dieter Heylen By draining resources, microparasites can negatively affect the host fitness, which in turn can result in reduced transmission when virulence leads to reductions in host population size. Therefore, for a microparasite to persist in nature, the level of harm it can do to its host is expected to be limited. We tested this hypothesis for tick-borne Borrelia burgdorferi sensu lato (s.l.) infections in the black...
Source: Ticks and Tick borne Diseases - Category: Zoology Source Type: research
CONCLUSIONS: The obtained results show that the pheasants had developed antibodies to the investigated tick-borne agents. For this reason, they seem to be involved in the epidemiology of the studied tick-borne bacteria. PMID: 28378988 [PubMed - in process]
Source: Annals of Agricultural and Environmental Medicine : AAEM - Category: Environmental Health Authors: Tags: Ann Agric Environ Med Source Type: research
Mepron, a thick liquid antimicrobial drug used to treat Babesia and malaria, as well as a fungal infection called Pneumocystitis carinii. In 2011, the United Kingdom stopped requiring that dogs brought into the country be inspected for ticks. Earlier this year, several dogs tested positive for babesia, a malaria-like disease transmitted to ticks that previously had only been found in foreign. These dogs had never left the U.K. While babesiosis is a new worry to U.K. dog owners, it's been a threat to human beings for years -- it just hasn't become a health-scare-of-the-week like Zika, West Nile, avian and swine flu. Most...
Source: Healthy Living - The Huffington Post - Category: Consumer Health News Source Type: news
This study presents evidence of I. affinis parasitizing five new host passerine species. During 2012–2014, 1,888 birds were captured and examined for ticks, and 18 immature I. affinis were collected from 12 birds—six Carolina Wrens (Thyrothorus ludovicianus); two Brown Thrashers (Toxostoma rufum); and one American Robin (Turdus migratorius), Eastern Towhee (Pipilo erythrophthalmus), Northern Cardinal (Cardinalis cardinalis), and White-throated Sparrow (Zonotrichia albicollis). Of 15 larvae and 3 nymphs collected, one nymph tested positive for B. burgdorferi DNA. I. affinis was found co-feeding on birds with imm...
Source: Journal of Medical Entomology - Category: Biology Authors: Tags: Short Communication Source Type: research
In this study, we isolated B. turdi from five I. frontalis feeding on Turdus merula, Turdus philomelos, Parus major and Troglodytes troglodytes, and one Ixodes ricinus feeding on a T. merula in Portugal. These isolates were genetically characterised according to their 5S-23S rRNA intergenic spacer, 16S rRNA and through typing of seven housekeeping genes (multilocus sequence typing). Multilocus sequence analyses revealed that the strains isolated in our study, although belonging to B. turdi genospecies, are not identical to the B. turdi reference strain Ya501. Instead, our strains are separated into a clear defined group, s...
Source: Microbial Ecology - Category: Microbiology Authors: Tags: Microb Ecol Source Type: research
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