Publications by authors named "Geraldo Marcio Da Costa"
Article Synopsis
- Staphylococcus aureus is a major cause of bovine mastitis, posing significant challenges in control due to its complex ability to persist in the mammary gland and cause health issues and economic losses.
- Researchers evaluated Galleria mellonella larvae as a model for studying the virulence of various S. aureus strains isolated from bovine mastitis and found that this model effectively highlighted differences in pathogenicity among the strains.
- The study determined that certain S. aureus strains (16S-717, 19C-828, and 31S-1443) exhibited high virulence, making G. mellonella a promising, cost-effective model for further research aimed at developing strategies to control bovine mastitis.
Objectives: This review summarizes the literature on the role of virulence and antimicrobial resistance genes of Staphylococcus aureus in bovine mastitis, focusing on the association between these characteristics and their implications for public and animal health.
Conclusions: There is the possibility of antimicrobial resistance gene exchange among different bacteria, which is of serious concern in livestock husbandry, as well as in the treatment of human staphylococcal infections.
Prototheca blaschkeae subsp. brasiliensis subsp. nov., isolated from cow milk.
Int J Syst Evol Microbiol
October 2017
A strain of an achlorophyllic alga, named PR24, was isolated from cow milk samples from the state of Minas Gerais, Brazil. Based on 18S rDNA, 28S rRNA, D1/D2 region of the LSU rDNA and SSU rRNA gene sequence similarities, this strain was found to be a member of the genus Prototheca and closely related to Protothecablaschkeae SAG2064. However, the novel strain could easily be distinguished from recognized Prototheca species by internal transcribed spacer, species-specific PCR, single-strand conformation polymorphism-PCR analysis and phenotypic characteristics.
View Article and Find Full Text PDFThe aim of this work was to evaluate the viabilitity of Tritrichomonas foetus cryopreservated with glycerol and dimethilsulphosyde (DMSO) at -196 degrees C. Samples of the protozoa were thaw two days and 6, 12, 18, and 26 months after freezing to be evaluated. In the time analyzed, the freezing was viable in 60% and 90% of freeze samples with glycerol at 10% and DMSO at 12%, respectively.
View Article and Find Full Text PDFThe aim of this study was to evaluate the parasitological contamination in samples of lettuce (Lactuca sativa) commercialized in Lavras city, Minas Gerais. The samples of lettuce showed low hygienic conditions, indicated by the presence of parasites of animal or human origin and high concentration of fecal coliforms.
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