Detection of Zoonotic Bartonella Pathogens in Rabbit Fleas, Colorado, USA.
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ABSTRACT:
SUBMITTER: Sato S
PROVIDER: S-EPMC7101129 | biostudies-literature |
REPOSITORIES: biostudies-literature
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| S-EPMC3294559 | biostudies-literature
Project description:BackgroundBartonellosis is an emerging vector-borne disease caused by different intracellular bacteria of the genus Bartonella (Rhizobiales: Bartonellaceae) that is transmitted primarily by blood-sucking arthropods such as sandflies, ticks and fleas. In Tunisia, there are no data available identifying the vectors of Bartonella spp. In our research, we used molecular methods to detect and characterize Bartonella species circulating in fleas collected from domestic animals in several of the country's bioclimatic areas.ResultsA total of 2178 fleas were collected from 5 cats, 27 dogs, 34 sheep, and 41 goats at 22 sites located in Tunisia's five bioclimatic zones. The fleas were identified as: 1803 Ctenocephalides felis (83%) (Siphonaptera: Pulicidae), 266 C. canis (12%) and 109 Pulex irritans (5%) (Siphonaptera: Pulicidae). Using conventional PCR, we screened the fleas for the presence of Bartonella spp., targeting the citrate synthase gene (gltA). Bartonella DNA was detected in 14% (121/866) of the tested flea pools [estimated infection rate (EIR) per 2 specimens: 0.072, 95% confidence interval (CI): 0.060-0.086]. The Bartonella infection rate per pool was broken down as follows: 55% (65/118; EIR per 2 specimens: 0.329, 95% CI: 0.262-0.402) in C. canis; 23.5% (8/34; EIR per 2 specimens: 0.125, 95% CI: 0.055-0.233) in P. irritans and 6.7% (48/714; EIR per 2 specimens: 0.032, 95% CI: 0.025-0.045) in C. felis. Infection rates, which varied significantly by bioclimatic zone (P < 0.0001), were highest in the humid areas. By sequencing, targeting the gltA gene and the 16S-23S rRNA Intergenic Spacer Regions (ITS), we identified three Bartonella zoonotic species: B. elizabethae, B. henselae, B. clarridgeiae, as well as uncharacterized Bartonella genotypes.ConclusionsTo the best of our knowledge, this is the first time that fleas in Tunisia have been shown to carry zoonotic species of Bartonella. The dog flea, Ctenocephalides canis, should be considered the main potential vector of Bartonella. Our study not only provides new information about this vector, but also offers a public health update: medical practitioners and farmers in Tunisia should be apprised of the presence of Bartonella in fleas and implement preventive measures.
| S-EPMC5606017 | biostudies-literature
Project description:BACKGROUND: Awareness for flea- and tick-borne infections has grown in recent years and the range of microorganisms associated with these ectoparasites is rising. Bartonella henselae, the causative agent of Cat Scratch Disease, and other Bartonella species have been reported in fleas and ticks. The role of Ixodes ricinus ticks in the natural cycle of Bartonella spp. and the transmission of these bacteria to humans is unclear. Rickettsia spp. have also been reported from as well ticks as also from fleas. However, to date no flea-borne Rickettsia spp. were reported from the Netherlands. Here, the presence of Bartonellaceae and Rickettsiae in ectoparasites was investigated using molecular detection and identification on part of the gltA- and 16S rRNA-genes. RESULTS: The zoonotic Bartonella clarridgeiae and Rickettsia felis were detected for the first time in Dutch cat fleas. B. henselae was found in cat fleas and B. schoenbuchensis in ticks and keds feeding on deer. Two Bartonella species, previously identified in rodents, were found in wild mice and their fleas. However, none of these microorganisms were found in 1719 questing Ixodes ricinus ticks. Notably, the gltA gene amplified from DNA lysates of approximately 10% of the questing nymph and adult ticks was similar to that of an uncultured Bartonella-related species found in other hard tick species. The gltA gene of this Bartonella-related species was also detected in questing larvae for which a 16S rRNA gene PCR also tested positive for "Candidatus Midichloria mitochondrii". The gltA-gene of the Bartonella-related species found in I. ricinus may therefore be from this endosymbiont. CONCLUSIONS: We conclude that the risk of acquiring Cat Scratch Disease or a related bartonellosis from questing ticks in the Netherlands is negligible. On the other hand fleas and deer keds are probable vectors for associated Bartonella species between animals and might also transmit Bartonella spp. to humans.
| S-EPMC3087693 | biostudies-literature
Project description:BackgroundBartonella alsatica has been formerly isolated from the blood of wild European rabbit (Oryctolagus cuniculus) and identified as causative agent of human endocarditis and lymphadenitis. Fleas are known biological vectors for Bartonella sp. This report details the specific detection of B. alsatica in three flea species commonly associated with the European wild rabbit in Southern Iberian Peninsula (Odontopsyllus quirosi, Spylopsyllus cuniculi and Xenopsylla cunicularis).MethodsIn the present study we have tested the presence of Bartonella alsatica in 26 European wild rabbit specimens and the fleas that they carrying at the moment of capture. Together to rabbits, captured from different localities of Andalusia (Jaen, Granada and Cordoba provinces), we evaluated three of fleas species that parasitize it usually using molecular techniques [PCR amplification and sequencing of intergenic transcribed spacer (ITS) 16S-23S rRNA].ResultsOver a sample of 26 wild rabbits carrying fleas, positive PCR amplicons for B. alsatica were obtained from 10 rabbits. All positive flea pools for B. alsatica were collected from positive rabbits [33.33% (8/24 pools) of S. cuniculi, 33.33% (5/15 pools) of X. cunicularis and 0% (0/7 pools) of O. quirosi]. In three positive rabbits, a pool of S. cuniculi and two pools of X. cunicularis respectively were negative. After sequencing, only B. alsatica (Genbank accession AF312506) was found in the rabbits sampled as well as in S. cuniculi and X. cunicularis within the respective fleas.ConclusionsThis research confirms the implication of two pulicidae flea species, S. cuniculi and X. cunicularis in the maintenance of infection by B. alsatica in wild rabbit populations throughout the year. The zoonotic character of this bartonellosis emphasizes the need to alert public health authorities and the veterinary community for the risk of infection.
| S-EPMC4311413 | biostudies-literature
Project description:Bartonellae are bacteria associated with mammals and their ectoparasites. Rodents often host different species of Bartonella. The aim of this study was to investigate the presence of Bartonella spp. in African giant pouched rats (Cricetomys gambianus) and their ectoparasites in Dakar, Senegal. In 2012, 20 rats were caught, and their fleas were identified. DNA was extracted from 170 selected fleas and qPCR was carried out to detect Bartonella spp. Subsequently, a Bartonella culture was performed from the rat blood samples and the isolated strains (16S rRNA, rpoB, ftsZ and ITS3) were genotyped. A total of 1117 fleas were collected from 19 rats and identified as Xenopsylla cheopis, the tropical rat flea. Bartonella DNA was detected in 148 of 170 selected fleas (87.1%). In addition, Bartonella strains were isolated from the blood of 17 rats (85%). According to Bartonella gene-sequence-based criteria for species definition, the isolated strains were identified as B. massiliensis (four strains) and two potential new species related to the zoonotic B. elizabethae. In this paper, these potentially new species are provisionally called Candidatus Bartonella militaris (11 strains) and Candidatus Bartonella affinis (two strains) until their description has been completed. Cricetomys gambianus and its fleas could constitute a public health risk in Dakar due to the high prevalence of Bartonella infection reported.
| S-EPMC8953472 | biostudies-literature
Project description:Spleen samples from 292 wild carnivores from Colorado, US were screened for Bartonella infection. Bartonella DNA was detected in coyotes ( Canis latrans ) (28%), striped skunks ( Mephitis mephitis ) (23%), red foxes ( Vulpes vulpes ) (27%), and raccoons ( Procyon lotor ) (8%) but not in black bears ( Ursus americanus ), gray foxes ( Urocyon cinereoargenteus ), and mountain lions ( Puma concolor ). Two Bartonella species, B. vinsonii subsp. berkhoffii and B. rochalimae, were identified. All 10 infected striped skunks exclusively carried B. rochalimae while coyotes, red foxes, and raccoons could be infected with both Bartonella species. Five of seven infected coyotes carried B. v. berkhoffii whereas five of seven infected red foxes and 11 of 14 infected raccoons carried B. rochalimae. Further studies are needed to understand relationships between Bartonella species, wild carnivores, and their ectoparasites.
| S-EPMC7075493 | biostudies-literature
Project description:Coinfections within hosts present opportunities for horizontal gene transfer between strains and competitive interactions between genotypes and thus can be a critical element of the lifestyles of pathogens. Bartonella spp. are Alphaproteobacteria that parasitize mammalian erythrocytes and endothelial cells. Their vectors are thought to be various biting arthropods, such as fleas, ticks, mites, and lice, and they are commonly cited as agents of various emerging diseases. Coinfections by different Bartonella strains and species can be common in mammals, but little is known about specificity and coinfections in arthropod vectors. We surveyed the rate of mixed infections of Bartonella in flea vectors (Polygenis gwyni) parasitizing cotton rats (Sigmodon hispidus) in which previous surveys indicated high rates of infection. We found that nearly all fleas (20 of 21) harbored one or more strains of Bartonella, with rates of coinfection approaching 90%. A strain previously identified as common in cotton rats was also common in their fleas. However, another common strain in cotton rats was absent from P. gwyni, while a rare cotton rat strain was quite common in P. gwyni. Surprisingly, some samples were also coinfected with a strain phylogenetically related to Bartonella clarridgeiae, which is typically associated with felids and ruminants. Finally, a locus (pap31) that is characteristically borne on phage in Bartonella was successfully sequenced from most samples. However, sequence diversity in pap31 was novel in the P. gwyni samples, relative to other Bartonella previously typed with pap31, emphasizing the likelihood of large reservoirs of cryptic diversity in natural populations of the pathogen.
| S-EPMC2075021 | biostudies-literature
Project description: Not available
| S-EPMC2744255 | biostudies-literature
Project description:The presence of Bartonella species in Xenopsylla cheopis fleas collected from Rattus spp. (R. exulans, R. norvegicus, and R. rattus) in Khon Kaen Province, Thailand was investigated. One hundred ninety-three fleas obtained from 62 rats, were screened by polymerase chain reaction using primers specific for the 16S-23S intergenic spacer region, and the presence of Bartonella DNA was confirmed by using the citrate synthase gene. Bartonella DNA was detected in 59.1% (114 of 193) of fleas examined. Sequencing demonstrated the presence of Bartonella spp. similar to B. elizabethae, B. rattimassiliensis, B. rochalimae, and B. tribocorum in the samples tested with a cutoff for sequence similarity ≥ 96% and 4 clustered together with the closest match with B. grahamii (95.5% identity). If X. cheopis proves to be a competent vector of these species, our results suggest that humans and animals residing in this area may be at risk for infection by several zoonotic Bartonella species.
| S-EPMC3771282 | biostudies-literature
Project description: Not available
| S-EPMC3322077 | biostudies-literature