Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 7 de 7
Filtrar
Más filtros











Intervalo de año de publicación
1.
Braz J Microbiol ; 53(4): 2215-2222, 2022 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-36074251

RESUMEN

This research aimed to identify the diversity of bacterial species of the genus Staphylococcus spp. in subclinical mastitis in dairy herds in the state of Piauí, Northeastern Brazil, and to evaluate the phenotypic and genotypic resistance profile. Samples were obtained from a total of 17 dairy farms, amounting to 321 positive samples in the California Mastitis Test. Staphylococcus spp. were identified by matrix-assisted laser desorption ionization time-of-flight mass spectroscopy. Subsequently, an antibiogram was performed, and a polymerase chain reaction was carried out to screen for resistance genes in the isolates. Among all the isolates, 59.45% (110/185) belonged to the Staphylococcus genus. Moreover, the following Staphylococcus spp. were identified Staphylococcus aureus, 68.1% (75/110); Staphylococcus chromogenes, 12.7% (14/110); Staphylococcus epidermidis, 5.4% (6/110); Staphylococcus sciuri, 4.5% (5/110); Staphylococcus warneri, 2.7% (3/110); Staphylococcus haemolyticus, 1.8% (2/110); Staphylococcus hominis, 1.8% (2/110); Staphylococcus arlettae, 0.9% (1/110); Staphylococcus capitis, 0.9% (1/110); and Staphylococcus gallinarum, 0.9% (1/110). The antibiogram showed a high frequency of resistance to penicillin and ampicillin, 70.0% (77/110) and 61.8% (68/110), respectively, and a low frequency of resistance to gentamicin and vancomycin, 10.9% (12/110) and 11.8% (13/110), respectively. In the genotypic tests for the different species of Staphylococcus spp., the occurrence of the blaZ gene was observed in 60.9% (67/110) of the isolates, followed by tetL and tetM, both with 20.0% (22/110) each, and the mecA and vanB genes were detected in 0.9% (1/110) of the samples. The identification of all Staphylococcus species isolated from subclinical mastitis cases and the phenotypic and genotypic resistance characterization in these isolates is of great importance for dairy farming in the state of Piauí, as well as for public health.


Asunto(s)
Mastitis Bovina , Staphylococcus aureus Resistente a Meticilina , Infecciones Estafilocócicas , Bovinos , Animales , Femenino , Humanos , Mastitis Bovina/microbiología , Brasil/epidemiología , Staphylococcus/genética , Infecciones Estafilocócicas/epidemiología , Infecciones Estafilocócicas/veterinaria , Infecciones Estafilocócicas/microbiología , Pruebas de Sensibilidad Microbiana , Leche/microbiología , Antibacterianos/farmacología
2.
Comp Immunol Microbiol Infect Dis ; 85: 101802, 2022 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-35395518

RESUMEN

The aim of this study was to identify emergent pathogens associated with bovine mastitis in northeastern Brazil and to characterize them for phenotypic and genotypic resistance to antimicrobials. A total of 321 milk samples from cows with subclinical mastitis were collected, and the isolates obtained in culture were identified using matrix-associated laser desorption-ionization - time of flight mass spectrometry. Phenotypic and genotypic antimicrobial resistance tests were performed. We identified 72 bacteria considered emergent in the study region: Enterococcus faecalis (26.3%; 19/72), Streptococcus agalactiae (22.2%; 16/72), Enterococcus faecium (20.0%; 15/72), Escherichia coli (6.9%; 5/72), 6.9% (5/72) Lactococcus garvieae (6.9%; 5/72), Acinetobacter baumannii (5.5%; 4/72), Bacillus subtilis (1.3%; 1/72), Kocuria marina (1.3%; 1/72), Macrococcus caseolyticus (1.3%; 1/72), Microbacterium resistens (1.3%; 1/72), Micrococcus luteus (1.3%; 1/72), Streptococcus dysgalactiae (1.3%; 1/72), Streptococcus hyovaginalis (1.3%; 1/72) and Streptococcus pluranimalium (1.3%; 1/72). The antibiogram revealed the following resistance profiles: ampicillin (77.7%; 56/72), cefoxitin (69.4%; 50/72), erythromycin (61.1%; 44/72), oxacillin (63.8%; 46/72), penicillin (79.1%; 57/72), tetracycline (63.8%; 46/72), gentamicin (25.0%; 18/72), and vancomycin (20.8%; 15/72). Of the isolates, 83.4% (60/72) showed multiple resistance to antimicrobials. The tetM gene was identified in 43.0% (31/72) of the isolates, followed by tetL (31.9%; 23/72), and blaZ (26.3%; 19/72). 83.4% (60/72) of the isolates presented a multiple antimicrobial resistance index higher than 0,2. Emergent bacteria with zoonotic and multiresistant potential occur in cows with mastitis in northeastern Brazil. It is necessary to monitor the occurrence of these and other bacteria in livestock environments and develop control strategies to prevent their spread.


Asunto(s)
Antiinfecciosos , Enfermedades de los Bovinos , Mastitis Bovina , Animales , Antibacterianos/farmacología , Bacterias/genética , Brasil/epidemiología , Bovinos , Farmacorresistencia Bacteriana/genética , Femenino , Mastitis Bovina/epidemiología , Mastitis Bovina/microbiología , Pruebas de Sensibilidad Microbiana/veterinaria , Leche/microbiología
3.
Comp Immunol Microbiol Infect Dis ; 84: 101785, 2022 May.
Artículo en Inglés | MEDLINE | ID: mdl-35276464

RESUMEN

Sanitary-hygienic failures in cheese making can pose health risks to consumers. This study aimed to identify multiresistant pathogens in different production stages of artisanal goat coalho cheese in Brazil and characterize their phenotypic and genotypic resistance. Eleven properties in the state of Pernambuco, Brazil, participated in the study. Samples were obtained from different stages of production and the humans involved. The samples obtained were submitted to microbiological culture, then all the isolated microorganisms were submitted to the Matrix Associated Laser Desorption-Ionization - Time of Flight technique for the microbiological identification of the species. Subsequently, Staphylococcus spp., Enterococcus spp. and Macrococcus caseolyticus were subjected to polymerase chain reaction to search for resistance genes and disc diffusion technique to evaluate the resistance profile. A total of 111 isolates were obtained and 31 species were identified, with the frequency of Staphylococcus spp. (62.20%; 69/111), Enterococcus spp. (11.60%; 13/111), Macrococcus caseolyticus (10%; 11/111), Bacillus spp. (3.60%; 4/111), Enterobacter spp. (3.60%; 4/111), Aureobasidium pullulans (1.80%; 2/111), Corynebacterium camporealensis (1.80%; 2/111), Issatchenkia occidentalis (1.80%; 2/111), Kocuria kristinae (1.80%; 2/111), Aerococcus viridans (0.90%; 1/111) and Filifactor villosus (0.90%; 1/111). Phenotypic and genotypic resistance was also detected with the occurrence of 15.90% (7/44) of the mecA gene, 4% (1/25) vanA, and 4% (1/25) vanB in Staphylococcus spp. and 20% (2/10) vanB in and Enterococcus spp. Emerging multiresistant pathogens are present in the production chain of artisanal goat cheese and humans, who exert an important role in disseminating these bacteria with imminent risks to human health.


Asunto(s)
Queso , Animales , Brasil/epidemiología , Queso/análisis , Queso/microbiología , Enterococcus/genética , Cabras , Staphylococcaceae , Staphylococcus
4.
Actual. psicol. (Impr.) ; 35(131)dic. 2021.
Artículo en Portugués | LILACS, SaludCR, PsiArg | ID: biblio-1383503

RESUMEN

Resumo A comportamento corrupto deve ser investigado a partir de diferentes níveis de análise. A nível intraindividual, a personalidade é uma variável relevante para sua compreensão. Objetivo. Na presente pesquisa, buscou-se analisar a influência dos traços de personalidade na intenção de comportamento corrupto a partir do modelo dos cinco grandes fatores da personalidade. Método. Participaram da pesquisa 286 indivíduos com idades entre 18 e 76 anos. Para coleta, foram utilizadas a Escala Reduzida dos cinco grandes fatores da personalidade, a Medida de Intenção de Corrupção e um questionário sociodemográfico. Resultados. Se encontraram correlações positivas entre a intenção de corrupção com as dimensões amabilidade, conscienciosidade e abertura à experiência. Porém, por meio de uma regressão linear múltipla, apenas a conscienciosidade teve efeito significativo. Implicações são discutidas.


Abstract Corruption must be investigated from different levels of analysis. At the intra-individual level, personality is a relevant variable for its understanding. Objective. In the present research, we sought to analyze the influence of personality traits on the intention of corrupt behavior based on the Big Five model of personality. Method. This study included 286 individuals between the ages of 18 and 76. A Reduced Scale of the Big Five personality factors, and a Corruption Intention Measurement scale, along general sociodemographic data were part of the data collection process. Results. Data showed positive correlations between corruption intention and the dimensions of agreeableness, conscientiousness, and openness. However, using multiple linear regression, only conscientiousness had a significant effect. Implications are discussed.


Asunto(s)
Humanos , Masculino , Femenino , Adolescente , Adulto , Persona de Mediana Edad , Anciano , Desarrollo de la Personalidad , Bioética , Corrupción , Brasil , Mala Conducta Profesional , Complicidad
5.
Comp Immunol Microbiol Infect Dis ; 79: 101701, 2021 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-34455153

RESUMEN

Dairy goats play a significant role in socio-economic, cultural, and nutritional development in many countries. This study aimed to identify multiresistant zoonotic pathogens causing mastitis in goats, in addition to characterizing them for the presence of resistance genes and phenotypic resistance. A total of 714 milk samples from 357 lactating goats in 12 farms in the Northeast region of Brazil were analyzed. The isolates were submitted to Matrix Associated Laser Desorption-Ionization - Time of Flight to identify bacterial species, Polymerase Chain Reaction (PCR) to search for resistance genes, and an antibiogram to evaluate the phenotypic profile of antimicrobial resistance. A total of 214 pathogens were identified and bacterial prevalence was 83.29 % (178/214) Staphylococcus spp.; 6.50 % (14/214) Micrococcus luteus; 3.73 % (8/214) Corynebacterium spp.; 2.80 % (6/214) Bacillus spp.; 1.38 % (3/214) Escherichia coli; 0.92 % (2/214) Enterobacter cloacae; 0.46 % (1/214) Aerococcus viridans; 0.46 % (1/214) Morganella morganii; and 0.46 % (1/214) Turicella otitidis. As for gene frequency, 64.60 % (115/178) of the isolates carried the blaZ gene; 37.07 % (66/178) norA; 22.47 % (40/178) tet(L); 16.85 % (30/178) tet(M); 14.04 % (25/178) norB; 8.42 % (15/178) vanA; 7.30 % (13/178) msrA; 6.41 % (5/178) tet-38; 4.49 % (8/178) norC; 2.25 % (4/178) mecA; and 0.56 % (1/178) vanB. Emerging multiresistant zoonotic pathogens are present in the goat milk production chain, especially the coagulase-negative Staphylococcus species that pose a risk to human and animal health.


Asunto(s)
Enfermedades de los Bovinos , Enfermedades de las Cabras , Mastitis Bovina , Infecciones Estafilocócicas , Animales , Antibacterianos/farmacología , Brasil/epidemiología , Bovinos , Femenino , Enfermedades de las Cabras/epidemiología , Cabras , Lactancia , Pruebas de Sensibilidad Microbiana/veterinaria , Leche , Infecciones Estafilocócicas/veterinaria , Staphylococcus
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA