Molecular characteristic of Pasteurella multocida isolates from Sumba Island at East Nusa Tenggara Province, Indonesia

Narcana, I K; Suardana, I Wayan; Besung, I Nengah Kerta

doi:10.14202/vetworld.2020.104-109

Cited by 4 publications

(2 citation statements)

References 24 publications

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“…Furthermore, several scientists have employed molecular techniques, such as using the 16S ribosomal RNA (rRNA) gene as a target to classify and characterize bacteria. This method has also been successfully used in the analysis of Pasteurella multocida [11] and as an accurate and specific technique in the identification of S. equi subspp. zooepidemicus [12], in the analysis of Escherichia coli O157:H7 [13].…”

Section: Introductionmentioning

confidence: 99%

Biochemical and molecular identification of Gram-positive isolates with β-hemolysis activity isolated from the nasal swab of pigs during the human meningitis outbreak in Badung Regency, Bali-Indonesia

et al. 2022

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Background and Aim: The nasal cavity of a pig serves as an entry point and a habitat for the colonization of commensal microbes and pathogenic bacteria. Based on biochemical and serological tests, Streptococcus β-hemolytic Group C was identified as the Gram-positive bacteria, which resulted in the 1994 outbreak and death of thousands of pigs in Bali. Furthermore, this agent is zoonotic and frequently results in the development of meningitis lesions in the infected pig. Recently, a meningitis outbreak in humans was also reported after the consumption of pig-derived foods at Sibang Kaja, Badung-Bali. This study aimed to identify and characterize Gram-positive β-hemolytic organisms collected from nasal swab of pigs from the outbreak area, as well as to compare API Kit and 16S rRNA gene analysis methods. Materials and Methods: This study commenced with the cultivation of two isolates, Punggul Swab Nasal (PSN) 2 and PSN 19, which were characterized by β-hemolysis activity. These samples were then conventionally and molecularly identified using Kit API 20 Strep and 16S ribosomal RNA (rRNA) gene primers, respectively. Results: Using the Kit API 20 Strep, both isolates were identified as Enterococcus faecium, which was previously classified as Group D Streptococci. Based on the 16S rRNA gene sequencing, PSN 2 and PSN 19 were molecularly confirmed to have 99 and 98.1% similarities with E. faecium (NR042054), respectively. Furthermore, both isolates share the same clade in the phylogenetic tree analysis. Conclusion: Using Kit API 20 Strep and 16S rRNA gene analysis, the PSN 2 and PSN 9 Gram-positive isolates with β-hemolysis activity from pig nasal swabs were identified as E. faecium.

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Section: Introductionmentioning

confidence: 99%

Biochemical and molecular identification of Gram-positive isolates with β-hemolysis activity isolated from the nasal swab of pigs during the human meningitis outbreak in Badung Regency, Bali-Indonesia

et al. 2022

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“…It can classify and characterize bacteria specifically. 6 Many organisms have been analyzed successfully using this method, like Streptococcus equi subspecies, Zooepidemicus, 7 Escherichia coli O157:H7, 8,9 Pasteurella multocida, 10 and others. Based on this fact, a study on identifying PST 10 isolate with β hemolytic characteristics originated from the pig's tonsil interest to serve.…”

Section: Introductionmentioning

confidence: 99%

Identification of PST 10 bacterial isolate with ?-hemolysis characteristic isolated from pig's tonsil

2022

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Background: Pig's tonsil is one of the entry points and habitat of commensal microbes and pathogenic bacteria, both Gram-positive and Gram-negative bacteria. Recently, a human meningitis outbreak has reported at Sibang Kaja, Badung-Bali. The cause of this outbreak has been suspected due to the consumption of pig-derived foods. The outbreak was known to be caused by Gram-positive ?-hemolytic bacteria. Based on this fact, PST 10 bacterial isolate with similar characteristics to the outbreak caused interesting identification.Method: PST 10 isolate was cultivated in a specific medium 5% defibrinated sheep blood agar plate. Subsequently, Gram staining, catalase, oxidase, salt tolerance (6% NaCl), and hemolysis test. This presumptive isolation was then conventionally identified by KIT API 20 STREP and molecularly using the 16S rRNA gene.Results: PST 10 isolate was identified as Enterococcus faecium using KIT API 20 STREP. Furthermore, the 16S rRNA gene sequencing analysis shows that the isolate has 99.6% similarities with Enterococcus faecalis (MG543832). The isolate shares the same clade in the phylogenetic tree analysis with a 100% bootstrap value.Conclusion: The high sensitivity in molecular identification mainly to distinguish close species using phenotypic approaches, PST 10 isolate was concluded as Enterococcus faecalis.

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Characterization of antibiotic resistance genes and bacteria in a municipal water resource recovery facility

Rajabi

Farajzadeh

Dehghanzadeh

et al. 2022

Water Environment Research

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Municipal water resource recovery facilities (WRRFs) are important sources of antibiotic‐resistant bacteria and genes (ARB and ARGs). In this study, antibiotic‐resistant total heterotrophic bacteria (THBR) counts (CFU/ml) cultivated from influent, effluent of activated sludge process, and outflow of disinfection unit of an urban WRRF were investigated for the presence of 16, 32, 64, and 128 μg/ml of nine antibiotics. The isolates of Pseudomonas spp., Acinetobacter spp., and Escherichia coli obtained from effluent of activated sludge process were subjected for molecular identification by detecting the 16S rRNA gene sequences. Additionally, using the polymerase chain reaction method (PCR), the isolates were investigated for the presence of blaSHV, blaTEM, blaCTX‐M, blaVIM, sul1, and qnrS genes. According to the results, the abundance of THBR counts was not significantly reduced by the biological treatment except for cefixime and sulfamethoxazole; it also increased for some antibiotics after disinfection unit. The average removal efficiency of THBR resistant to ciprofloxacin, sulfamethoxazole, and ceftazidime were 7.9 ± 1.7%, 41.8 ± 2.1%, and 14.4 ± 6.2%, respectively. Also, all the tested isolates were resistant to at least four antibiotics. For all antibiotics, the resistance ratio (THBR/THB) significantly increased in the effluent and after chlorination unit. Among 12 resistant isolates, blaTEM and sul1 genes were the most frequently detected ones involved in 92% and 83% of the isolates, respectively. Both blaTEM and sul1 genes were found in 100% of E. coli, and 83% and 67% of Pseudomonas spp. isolates, respectively. Further efforts are necessary to limit the transmission of ARB and ARGs from WRRFs into the environment and prevent human health threats. Practitioner Points The ratio of resistance significantly increased after biological treatment. Up to 40% of heterotrophic bacteria in the effluent was antibiotic resistant. blaTEM and sul1 genes were more prevalent (92%) in all isolates of bacteria. Both blaTEM and sul1 genes were found in 100% of E. coli isolates. Pseudomonas spp. holds blaTEM and sul1 genes in 83% and 67% of isolates, respectively.

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Molecular characteristic of Pasteurella multocida isolates from Sumba Island at East Nusa Tenggara Province, Indonesia

Cited by 4 publications

References 24 publications

Biochemical and molecular identification of Gram-positive isolates with β-hemolysis activity isolated from the nasal swab of pigs during the human meningitis outbreak in Badung Regency, Bali-Indonesia

Biochemical and molecular identification of Gram-positive isolates with β-hemolysis activity isolated from the nasal swab of pigs during the human meningitis outbreak in Badung Regency, Bali-Indonesia

Identification of PST 10 bacterial isolate with ?-hemolysis characteristic isolated from pig's tonsil

Characterization of antibiotic resistance genes and bacteria in a municipal water resource recovery facility

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