Emerging Bartonella spp. infection can result in clinical symptoms such as endocarditis in humans and animals. This study analyzed the genetic phylogeny of the Bartonella spp. circulating in Iranian dogs. Also, this is first study on the relationship of Bartonella spp. and haematological factors from dogs in Fars. Ninety-eight blood samples were collected from the dogs of Fars province, Iran. Two different PCRs targeting rpoB gene and ITS sequence of Bartonella spp., followed by sequencing were performed. In addition, CBC and the differential count of WBC were determined. The “prevalence” of Bartonella spp. was 12.2 % (95 % CI: 5.72–18.68 %) in this population and the sequences matched with a newly proposed species; ‘Candidatus Bartonella merieuxii’. A significant increase in WBC due to neutrophilia and decreased RBC, Hct, and Hb concentrations were detected in Bartonella spp. infected dogs. The close contact between humans and dogs, and the zoonosis potential of Candidatus Bartonella merieuxii, emphasize on the need for more studies on ‘Candidatus Bartonella merieuxii’.

新兴的巴尔通体属。感染可导致临床症状，例如人和动物的心内膜炎。这项研究分析了Bartonella spp的遗传系统发育。在伊朗狗中流传。另外，这是对巴尔通体属的关系的首次研究。和法尔斯犬的血液学因素。从伊朗法尔斯省的狗中收集了98份血液样本。进行了两种针对rpoB基因和Bartonella spp。的ITS序列的PCR ，然后进行测序。另外，确定CBC和WBC的差异计数。巴尔通体的“流行”spp。在该种群中为12.2％（95％CI：5.72–18.68％），且该序列与新提出的物种匹配；“暂定巴尔merieuxii”。由于嗜中性粒细胞增多，WBC显着增加，而Bartonella spp中检测到RBC，Hct和Hb浓度降低。被感染的狗。的人畜共患病潜在的人类和狗之间的密切联系，并暂定巴尔merieuxii，强调需要对“更多的研究，暂定巴尔merieuxii”。