First proposed in 2016,, phenotypic, phylogenetic, and genomic analyses have led researchers to formally propose the creation of Bartonella mastomydia sp.nov. that contains the strain 008 isolated from Senegalese M. erythroleucus (Guinea multimammate mouse) blood samples.

Bartonella Mastomydis Strain 008Bartonella mastomydis strain 008 (FEI Company, Limeil-Brévannes, France) 

Noncontiguous finished genome sequence and description of Bartonella mastomydis sp. nov.


Bartonella mastomydis sp. nov. strain 008 is the type strain of B. mastomydis sp. nov., a new species within the genus Bartonella. This strain was isolated from Mastomys erythroleucus rodents trapped in the Sine-Saloum region of Senegal. Here we describe the features of this organism, together with the complete genome sequence and its annotation. The 2 044 960 bp long genomes with 38.44% G + C content contains 1674 protein-coding and 42 RNA genes, including three rRNA genes.


Just over a century ago, the first historical record of the emerging Bartonella genus was made during World War I, when a million frontline troops were shown to be plagued by a disease later known as trench fever. This was caused by the louse-borne bacterium now known as Bartonella quintana [1]. Bartonella are small facultative intracellular, vector-transmitted, Gram-negative, haemotropic bacilli, classified within the class of α-proteobacteria [2]….The Bartonellaceae family (Gieszczykiewicz 1939) [4] contains 35 species and three subspecies ( as of 1 August 2017 [5]. Bartonellae usually exist in two specific habitats: the gut of the obligately blood-sucking arthropod vector and the bloodstream of the mammalian host [1]. Among the 38 recognized Bartonella species, 17 have been described as pathogenic in humans [6]. In humans, Bartonella bacteria are among the most described as being associated with endocarditis or cardiopathy. In animal hosts, a wide array of clinical syndromes, as well as asymptomatic infection and endocarditis, have been described [6], [7], [8].

New species and subspecies are constantly being proposed. Candidate species belonging to the genus Bartonella from a wide range of animal reservoirs have been described but not yet assigned new species designations [1]. Parasitism by bartonellae is widespread among small mammals. Potentially new Bartonella species infecting bat communities were reported in Madagascar [9], Kenya [10], Puerto Rico [11] and French Guiana [12]. Rodents and insectivores were showed to maintain bartonellae infections. Additionally, a large number of partially characterized Bartonella have been isolated from rodents in Southeast Asia [13], South Africa [14], [15], Europe, North and South America [16], Nigeria [17], the Republic of Congo and Tanzania [16]. In Senegal, West Africa, using the criteria proposed by La Scola et al. [18] based on the multilocus sequence analyses of four genes and the intergenic spacer (ITS) as a tool to the description of bartonellae, three new bartonellae were isolated and described: Bartonella senegalensis, Bartonella massiliensis from the soft tick Ornithodoros sonrai[13] and Bartonella davoustii from cattle [19].

We sought to describe an additional Bartonella species isolated from small mammals in the region of Sine-Saloum, in western Senegal [20]. In this rural region, the biotype is favourable to the spread of commensal mammals harbouring pathogenic microorganisms and is often found in close contact with humans. This situation increases the risk of human and animal transmission of infectious disease from rodent-associated tick-borne pathogens. This work describes the genome sequence of the proposed candidate Bartonella mastomydis strain 008 isolated from Mastomys erythroleucususing a polyphasic approach combining matrix-assisted desorption ionization–time of flight mass spectrometry (MALDI-TOF MS) and genomic properties, as well as next-generation sequencing technology to complete description of a potentially new species [21].

Bartonella mastomydis is sensitive to amoxicillin, amoxicillin/clavulanic acid, oxacillin, imipenem, rifampicin, nitrofurantoin, doxycycline, linezolid, tobramycin, gentamycin, trimethoprim/sulfamethoxazole, fosfomycin and ciprofloxacin. Bartonella mastomydis is resistant to metronidazole and colistin.



I once heard it said that every animal species probably has their own strain of Bartonella.  All I know is many Lyme/MSIDS patients struggle with it as it is extremely tenacious.  Here, we see a novel species in Senegalese mice.  While there are 17 known species of Bart that are pathogenic to humans, as this article points out, more are continually being discovered.

Known for causing heart issues in humans, it does oh so much more:

Normally thought of as a Lyme “co-infection,” some LLMD’s state that Bartonella can be more debilitating than Lyme.  This doctor says Bartonella is the “new Lyme”: