Publications by authors named "Nathita Phumthanakorn"

Article Synopsis
  • Methicillin-resistant Staphylococcus haemolyticus (MRSH) is a major cause of bovine mastitis, particularly in dairy cows, with sequence types ST3 and ST42 being most significant.
  • This study analyzed two clinical isolates, MRSH-ST3 strain M62.3 and MRSH-ST42 strain M81.1, from milk in Thailand, focusing on their unique SCCmec structures using advanced sequencing techniques.
  • Results revealed that both strains shared a class C1 mec complex but lacked the ccr gene complex, with M81.1 showing a novel variant and showcasing how variations in SCCmec can indicate the evolutionary adaptations of MRSH.
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The aim of this study was to investigate and characterize the microbiome in bile samples obtained from dogs with gallbladder mucocele (6), cats with suspected cholangitis/cholangiohepatitis (4), as well as from healthy dogs (6) and cats (4). Our goal was to compare the microbiome patterns with clinical findings and bacterial culture results in diseases of the gallbladder and to identify a potential microbial biomarker of diseased groups. The microbial taxa composition revealed that Proteobacteria were the most dominant phylum in healthy and diseased individuals in all groups.

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  • Carbapenem and colistin-resistant bacteria are becoming a serious public health concern globally, with limited genetic information about strains affecting humans and dogs in Thailand.* -
  • The study analyzed six resistant isolates (three from humans and three from dogs) using advanced methods like MALDI-TOF MS and whole-genome sequencing to identify their resistance genes.* -
  • Results showed all isolates produced carbapenemase and possessed multiple virulence genes, with varied genetic backgrounds indicating potential for widespread resistance spread among humans and animals.*
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  • * Researchers isolated 49 strains of P. aeruginosa from pets, discovering a variety of sequence types (STs), including some classified as high-risk, while most strains showed low resistance to antibiotics.
  • * The findings indicate the presence of concerning carbapenem-resistant strains, emphasizing the need for ongoing monitoring to prevent potential transfer of resistant bacteria from pets to humans.
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Staphylococcus haemolyticus and Staphylococcus hominis subsp. are common coagulase-negative staphylococcus opportunistic pathogens. In Thailand, the clinical strains 1864 and 48 and S.

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This study aimed to investigate sites for colonization and molecular epidemiology of antimicrobial-resistant Pseudomonas aeruginosa in a veterinary teaching hospital. Bacterial specimens from surface and liquid samples (n = 165) located in five rooms were collected three times every 2 months, and antimicrobial susceptibility was subsequently determined by minimum inhibitory concentrations. The genomes of resistant strains were further analyzed using whole-genome sequencing.

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This study aimed to investigate the frequency, distribution, and antimicrobial resistance of coagulase-negative staphylococci (CoNS) obtained from clinical samples from dogs and cats and to classify any methicillin-resistant CoNS (MRCoNS). The samples were collected in 2017-2018, and species identification and antimicrobial susceptibility testing were routinely performed using the Vitek2 system. Among 1,056 staphylococci, 185 CoNS (17.

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  • Methicillin-resistant Staphylococcus pseudintermedius (MRSP) is a bacterium that commonly affects dogs and can also infect humans, but its ability to adapt to humans is not fully understood.
  • A study analyzed the genomes of MRSP isolates from both dogs and humans to compare their similarities, focusing on three major clones found in Thailand (ST45, ST112, and ST181).
  • The research discovered specific genetic features linked to pathogenicity and significant genetic diversity within the ST45 strains, indicating that some MRSP strains may be better at adapting to different host environments.
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belongs to the normal bacterial flora of dairy cows and does not usually cause disease. However, methicillin-resistant strains were isolated from bovine mastitis milk. These bacteria had acquired a chromosomal island (McRI -1 or McRI -2) carrying the methicillin resistance gene To gain insight into the distribution of McRI types in from cattle, 33 -containing strains from Switzerland were characterized using molecular techniques, including multilocus sequence typing, antibiotic resistance gene identification, and PCR-based McRI typing.

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Assays were done to assess the ability of 5 methicillin-resistant (MRSP) isolates from difference sources to adhere to canine and human corneocytes. Cell wall-associated (CWA) protein gene profiles were examined to look for associations with adherence. Five MRSP strains were studied: 3 with the same CWA protein gene profile (14 genes) and belonging to sequence type (ST) 45 were isolated from a dog, a human, and the environment.

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Purpose: This study aimed to detect and identify staphylococcal enterotoxin (SE) genes in methicillin-resistant Staphylococcus pseudintermedius (MRSP) strains from different sources, and to investigate the relationship between their sequence types (STs) and SE gene patterns.

Methodology: The profiles of 17 SE genes in 93 MRSP strains isolated from dogs (n=43), humans (n=18) and the environment (n=32) were detected by PCR. Multilocus sequence typing (MLST), SCCmec typing and pulsed-field gel electrophoresis (PFGE) were used to analyse the clonal relatedness between the molecular type and SE gene profiles.

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Staphylococcus pseudintermedius commonly colonizes the skin of dogs, whilst nasal carriage may occur in humans who are in contact with dogs or the environment of veterinary hospitals. Genes encoding cell wall-associated (CWA) proteins have been described in Staphylococcus aureus but knowledge of their occurrence in S. pseudintermedius is still limited.

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This study aimed to investigate the nasal carriage of methicillin-resistant (MRSP) in dogs treated with oral cephalexin monohydrate. Ten dogs with superficial pyoderma were monitored longitudinally for carriage of MRSP for up to 1 year after treatment; the strains were typed and antibiograms were determined. Methicillin-susceptible (MSSP) was recovered prior to treatment in all dogs and could be isolated after 12 months in 1 dog.

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