RESUMO
Here, we report the full-genome sequence of an NAD-hemin-independent Avibacterium paragallinarum serovar C-2 strain, FARPER-174, isolated from layer hens in Peru. This genome contained 12 potential genomic islands that include ribosomal protein-coding genes, a nadR gene, hemocin-coding genes, sequences of fagos, an rtx operon, and drug resistance genes.
RESUMO
The bacterium Ornithobacterium rhinotracheale is associated with respiratory disease in wild birds and poultry. In this study, the phylogenetic analysis of nine reference strains of O. rhinotracheale belonging to serovars A to I, and eight Mexican isolates belonging to serovar A, was performed. The analysis was extended to include sequences from another 23 strains available in the public domain. The analysis showed that the 40 sequences formed six clusters, I to VI. All eight Mexican field isolates were placed in cluster I. One of the reference strains appears to present genetic diversity not previously recognized and was placed in a new genetic cluster. In conclusion, the phylogenetic analysis of O. rhinotracheale strains, based on the 16S rRNA gene, is a suitable tool for epidemiologic studies.
Assuntos
Ornithobacterium/classificação , México , Tipagem Molecular , Ornithobacterium/isolamento & purificação , Filogenia , RNA Bacteriano , RNA Ribossômico 16SRESUMO
The pathogenic bacteria of Corynebacterium pseudotuberculosis caused a chronic contagious infectious disease of the caseous lymphadenitis or pseudotuberculosis. Globally, isolates obtained from different injuries that affect sheep and goats, have been identified by fully or partially gene sequencing. However, in Mexico there is no complete study to identify by molecular and phylogenetic techniques the circulating isolates as well as its virulence factors. Therefore, in the present study we reported the identification of 57 isolates of C. pseudotuberculosis by bacteriological tests and the amplification of 16S rRNA, rpoB and pld genes, as well as, genes involved in virulence and pathogenicity: Fag A, Fag B, Fag C, Fag D and hsp60. Phylogenetic analysis was performed based on the partial sequence of the rpoB gene. Genes involved in virulence and pathogenicity were identified in the 98.2% of the isolates. Regarding the phylogenetic analysis, were identified the species and subspecies to which they belong of all the tested isolates. The phenotypic and genotypic characterization will allow to establish preventive and prophylactic measures aimed to the creation of effective immunogens against Corynebacterium pseudotuberculosis.
Assuntos
Corynebacterium pseudotuberculosis/classificação , Corynebacterium pseudotuberculosis/genética , Corynebacterium pseudotuberculosis/isolamento & purificação , Cabras/microbiologia , Filogenia , Ovinos/microbiologia , Abscesso/microbiologia , Abscesso/veterinária , Animais , Proteínas de Bactérias/genética , Chaperonina 60/genética , Infecções por Corynebacterium/microbiologia , Infecções por Corynebacterium/veterinária , Corynebacterium pseudotuberculosis/patogenicidade , RNA Polimerases Dirigidas por DNA/genética , Genes Bacterianos/genética , Doenças das Cabras/microbiologia , Linfadenite/microbiologia , Linfadenite/veterinária , México , RNA Ribossômico 16S/genética , Doenças dos Ovinos/microbiologia , Virulência , Fatores de Virulência/genéticaRESUMO
The bacterium Ornithobacterium rhinotracheale is associated with respiratory disease and septicemia in poultry. In this study, 9 reference strains and a total of 23 isolates of O. rhinotracheale from respiratory diseased poultry from Mexico were serotyped and genotyped. Furthermore, the antimicrobial susceptibility of isolates and reference strains of O. rhinotracheale were determined. All isolates belong to serotype A and showed a clonal relationship. All reference strains and isolates were resistant to colistin, fosfomycin, gentamicin, kanamycin, streptomycin, and trimethoprim-sulfamethoxazole. These results should eventually be helpful in planning strategies for the control of O. rhinotracheale infections in poultry in Mexico.
Assuntos
Antibacterianos/farmacologia , Galinhas , Farmacorresistência Bacteriana , Infecções por Flavobacteriaceae/veterinária , Ornithobacterium/efeitos dos fármacos , Ornithobacterium/genética , Doenças das Aves Domésticas/microbiologia , Animais , Infecções por Flavobacteriaceae/microbiologia , Genótipo , México , SorotipagemRESUMO
The isolation of V-factor (NAD)-independent, serovar C-1 of Avibacterium paragallinarum from growing layer hens with infectious coryza, is reported for the first time. Av. paragallinarum serovar C-1 isolates were PCR confirmed and shared a unique genetic profile. Isolation of Av. paragallinarum NAD-independent biovar, serotyping and genotyping of isolates at the avian diagnostic laboratories are discussed.
Se informa por primera ocasión el aislamiento de Avibacterium paragallinarum, serovariedad C-1, independiente del factor V de crecimiento (NAD), a partir de gallinas de reemplazo con coriza infecciosa. Los aislamientos de Av. paragallinarum serovariedad C-1 incluidos en el estudio fueron confirmados por PCR y compartieron un perfil genético único. Se discute considerar en los laboratorios de diagnóstico aviar el aislamiento de Av. paragallinarum de la biovariedad independiente de NAD, así como la necesidad de serotipificación y tipificación genética de los aislamientos.
RESUMO
Avibacterium paragallinarum is the causative agent of infectious coryza, an acute respiratory disease of chickens. In this study, a total of 28 isolates of A. paragallinarum from Ecuador were serotyped by the hemagglutinin scheme which recognizes nine serovars. Out of 28 isolates, 17 isolates belonged to serovar A-3, and five isolates to each serovars B-1 and C-1, whereas one isolate was non-typeable. This is the first report of A. paragallinarum serovar A-3 outside Brazil and serovar C-1 outside Japan.