Graciela Völz Lopes
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View article: Salmonella enterica isolated from a Brazilian beef production chain: Prevalence, virulence genotypes, sanitizer and antimicrobial susceptibility, and biofilm formation ability
Salmonella enterica isolated from a Brazilian beef production chain: Prevalence, virulence genotypes, sanitizer and antimicrobial susceptibility, and biofilm formation ability Open
In Brazil, meat production holds significant economic importance for the domestic market and international exports. Ensuring the microbiological safety of meat products requires continuous monitoring through the production chain. In this c…
View article: The biofilm-forming ability of Salmonella enterica subsp. enterica isolated from swine-feed mills
The biofilm-forming ability of Salmonella enterica subsp. enterica isolated from swine-feed mills Open
Animal feed has been considered an important vehicle for introducing Salmonella enterica subsp. enterica in pig farms. Salmonella survival and persistence in feed mill environments have been associated with biofilm-forming ability. This st…
View article: Occurrence, genetic diversity and resistance profiles of Salmonella enterica from Brazilian sausages collected at production facilities
Occurrence, genetic diversity and resistance profiles of Salmonella enterica from Brazilian sausages collected at production facilities Open
View article: Genotypic identification and antimicrobial susceptibility profiles of coagulase-negative staphylococci isolated from sheep’s milk
Genotypic identification and antimicrobial susceptibility profiles of coagulase-negative staphylococci isolated from sheep’s milk Open
Mastitis affect milk production and dairy products in sheep farming. Its main etiological agents are coagulase-negative staphylococci (CoNS). Identification based on DNA sequencing is considered the gold-standard method for these organisms…
View article: Mechanisms of antimicrobial resistance in Salmonella
Mechanisms of antimicrobial resistance in Salmonella Open
Salmonella enterica subsp. enterica is considered one of the most common causes of foodborne illness (FOBD) and animal products are responsible for a significant number of human cases of salmonellosis. In addition to the risk posed by Salm…
View article: <i>Listeria monocytogenes</i>from food and food industry environments with reduced susceptibility to benzalkonium chloride, sodium hypochlorite, and peracetic acid
<i>Listeria monocytogenes</i>from food and food industry environments with reduced susceptibility to benzalkonium chloride, sodium hypochlorite, and peracetic acid Open
The growing number of Listeria monocytogenes strains displaying increased tolerance to sanitizers widely applied in the food industry is becoming a problem. The aims of this study were to evaluate the susceptibility of L. monocytogenes iso…
View article: Salmonella Derby from pig production chain over a 10-year period: antimicrobial resistance, biofilm formation, and genetic relatedness
Salmonella Derby from pig production chain over a 10-year period: antimicrobial resistance, biofilm formation, and genetic relatedness Open
View article: Qualidade microbiológica do leite cru refrigerado na região do Médio Alto Uruguai, Rio Grande do Sul / Microbiological quality of raw milk in the Médio Alto Uruguai region, Rio Grande do Sul
Qualidade microbiológica do leite cru refrigerado na região do Médio Alto Uruguai, Rio Grande do Sul / Microbiological quality of raw milk in the Médio Alto Uruguai region, Rio Grande do Sul Open
O objetivo desse trabalho foi avaliar a qualidade microbiológica do leite cru refrigerado de propriedades leiteiras que possuem tanques individuais de refrigeração localizadas em municípios da região do Médio Alto Uruguai, Rio Grande do Su…
View article: The effect of sodium chloride and temperature on the levels of transcriptional expression of staphylococcal enterotoxin genes in Staphylococcus aureus isolates from broiler carcasses
The effect of sodium chloride and temperature on the levels of transcriptional expression of staphylococcal enterotoxin genes in Staphylococcus aureus isolates from broiler carcasses Open
View article: Thermal stress alters the basal value of serum proteins in laying hens
Thermal stress alters the basal value of serum proteins in laying hens Open
This study aimed to evaluate the effect of thermal stress on the physiological and metabolic parameters in laying hens and the microbiological quality of eggs. The experiment was performed with 50 Rhode Island Red hens in the initial layin…
View article: Genetic diversity, antimicrobial resistance, and virulence genes of thermophilic Campylobacter isolated from broiler production chain
Genetic diversity, antimicrobial resistance, and virulence genes of thermophilic Campylobacter isolated from broiler production chain Open
View article: Thermal stress alters the basal value of serum proteins in laying hens
Thermal stress alters the basal value of serum proteins in laying hens Open
This study aimed to evaluate the effect of thermal stress on the physiological and metabolic parameters in laying hens and the microbiological quality of eggs. The experiment was performed with 50 Rhode Island Red hens in the initial layin…
View article: <i>Listeria monocytogenes</i> in sliced cheese and ham from retail markets in southern Brazil
<i>Listeria monocytogenes</i> in sliced cheese and ham from retail markets in southern Brazil Open
The aims of this study were to evaluate the occurrence of Listeria monocytogenes and Salmonella spp. in sliced cheese and ham from retail markets in southern Brazil, as well as to perform molecular characterization and to assess the antimi…
View article: Microbiological quality of colonial cheese sold in Porto Alegre-RS
Microbiological quality of colonial cheese sold in Porto Alegre-RS Open
Colonial cheese is a traditional dairy product in southern Brazil and is commonly purchased by the citizens of Porto Alegre. However, there is still a lack of technical regulation of colonial cheese, and there is little information about t…
View article: Occurrence and characterization of Listeria monocytogenes from beef jerky processing line
Occurrence and characterization of Listeria monocytogenes from beef jerky processing line Open
View article: Genetic diversity of Campylobacter jejuni and Campylobacter coli isolated from poultry meat products sold on the retail market in Southern Brazil
Genetic diversity of Campylobacter jejuni and Campylobacter coli isolated from poultry meat products sold on the retail market in Southern Brazil Open
Campylobacter is regarded as the most common bacterial cause of gastroenteritis throughout the world and most cases of human campylobacteriosis can be traced back to the consumption of poultry meat. In Brazil, few studies evaluated the gen…
View article: Microbiological quality and safety assessment in the production of moderate and high humidity cheeses
Microbiological quality and safety assessment in the production of moderate and high humidity cheeses Open
Moderate and high humidity cheeses are described as important vehicles of pathogens in many foodborne diseases outbreaks. Microbial contamination can occur in raw material or in the different steps of the product processing due to inadequa…
View article: Antimicrobial resistance profiles of Staphylococcus aureus clusters on small dairy farms in southern Brazil
Antimicrobial resistance profiles of Staphylococcus aureus clusters on small dairy farms in southern Brazil Open
In intensive dairy farming, persistent intramammary infection has been associated with specific Staphylococcus (S.) aureus strains, and these strains may be resistant to antimicrobials. The objective of this study was to evaluate the antim…
View article: Methicillin-resistant Staphylococcus pseudintermedius clonal groups isolated from canine pyoderma in Brazil.
Methicillin-resistant Staphylococcus pseudintermedius clonal groups isolated from canine pyoderma in Brazil. Open
Background : Since the early reports of mecA -positive Staphylococcus ( S .) pseudintermedius isolates in the United States and in Europe were published, the frequency of methicillin-resistant S. pseudintermedius (MRSP) has incre…
View article: Antimicrobial resistance of Enterococcus isolated from pre-chill swine carcasses
Antimicrobial resistance of Enterococcus isolated from pre-chill swine carcasses Open
"Background: As a result of the extensive use of antimicrobials in agriculture, animals have been implicated as possible reservoirs of resistant strains of bacteria. Enterococci are members of the normal flora of the gastrointestinal tract…
View article: <i>Listeria monocytogenes</i>isolates from food and food environment harbouring<i>tetM</i>and<i>ermB</i>resistance genes
<i>Listeria monocytogenes</i>isolates from food and food environment harbouring<i>tetM</i>and<i>ermB</i>resistance genes Open
Listeria monocytogenes is an important agent of foodborne diseases. The results of this study suggest a potential capacity of L. monocytogenes isolates from food and food environment to cause human infections. Antimicrobial multi-resistanc…
View article: Biofilm formation by Salmonella enterica strains isolated from feed mills
Biofilm formation by Salmonella enterica strains isolated from feed mills Open
Feed supplied to pigs is considered an important vehicle for Salmonella enterica subsp. enterica introduction on farm. Salmonella can be able to form biofilm on several abiotic surfaces, which may contribute to environmental persistence. T…