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3 results on '"rapd pcr profiling"'

1. Phenotypic and genetic properties of susceptible and multidrug-resistant Pseudomonas aeruginosa isolates in Southern Serbia

Author

Milojković Marko, Nenadović Željka, Stanković Slaviša, Božić Dragana D., Nedeljković Nataša Stanković, Ćirković Ivana, Petrović Marija, and Dimkić Ivica

Subjects
clinical isolates, multidrug resistance, phenotypic characteristics, rapd pcr profiling, fenotipska obilježja, klinički izolati, rapd pcr profiliranje, višestruka otpornost, Toxicology. Poisons, RA1190-1270
Abstract

Drug resistance of Pseudomonas aeruginosa is a leading problem in hospital infections. The aim of this study was to determine the best molecular genetic discrimination method for Pseudomonas spp. isolates among 94 outpatients and inpatients and see their grouping by phenotype characteristics (biofilm formation, frequency of serotypes, pigmentation, production of different class of beta-lactamases, and susceptibility to different antibiotic classes) and genotype. The most common serotypes were P1, P6, and P11, while co-productions of pyoverdine and pyocyanin were observed in 70 % of isolates. A total of 77.66 % isolates were mostly weak and moderate biofilm producers. Isolates were susceptible to colistin (100 %), aztreonam (97.87 %), imipenem (91.49 %), doripenem (90.43 %), and meropenem (84.04 %). MICs values confirmed susceptibility to ceftazidime and cefepime and singled out meripenem as the most effective inhibitor. Most isolates were resistant to aminoglycosides and fluoroquinolones. Only two isolates produced ESBL, eight were carbapenemase producers, and five isolates produced MBLs. Twenty-nine isolates were multidrug-resistant; 82.8 % of which produced both pigments, 58.3 % were non-typeable, while the P6 and P11 serotypes were equally distributed (16.7 %). Thirteen MDR isolates were strong enzyme producers. RAPD PCR analysis using primer 272 proved the best at discriminatory fingerprinting for Pseudomonas isolates, as it allocated 12 clusters. A correlation between DNA patterns and antibiotic resistance, production of pigments, serotypes distribution, and biofilm formation was not observed, and only confirmed higher genetic heterogeneity among P. aeruginosa isolates, which suggests that other molecular methods are needed to reveal potential relations between genotypic patterns and phenotypic characteristics.

Published
2020
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2. Phenotypic and genetic properties of susceptible and multidrug-resistant Pseudomonas aeruginosa isolates in Southern Serbia.

Author

Milojković, Marko, Nenadović, Željka, Stanković, Slaviša, Božić, Dragana D., Nedeljković, Nataša Stanković, Ćirković, Ivana, Petrović, Marija, and Dimkić, Ivica

Subjects
PSEUDOMONAS aeruginosa, CEFTAZIDIME, DRUG resistance in bacteria, BETA lactamases, NOSOCOMIAL infections, DRUG resistance, RHAMNOLIPIDS, SEROTYPES
Abstract

Drug resistance of Pseudomonas aeruginosa is a leading problem in hospital infections. The aim of this study was to determine the best molecular genetic discrimination method for Pseudomonas spp. isolates among 94 outpatients and inpatients and see their grouping by phenotype characteristics (biofilm formation, frequency of serotypes, pigmentation, production of different class of beta-lactamases, and susceptibility to different antibiotic classes) and genotype. The most common serotypes were P1, P6, and P11, while co-productions of pyoverdine and pyocyanin were observed in 70 % of isolates. A total of 77.66 % isolates were mostly weak and moderate biofilm producers. Isolates were susceptible to colistin (100 %), aztreonam (97.87 %), imipenem (91.49 %), doripenem (90.43 %), and meropenem (84.04 %). MICs values confirmed susceptibility to ceftazidime and cefepime and singled out meripenem as the most effective inhibitor. Most isolates were resistant to aminoglycosides and fluoroquinolones. Only two isolates produced ESBL, eight were carbapenemase producers, and five isolates produced MBLs. Twenty-nine isolates were multidrug-resistant; 82.8 % of which produced both pigments, 58.3 % were non-typeable, while the P6 and P11 serotypes were equally distributed (16.7 %). Thirteen MDR isolates were strong enzyme producers. RAPD PCR analysis using primer 272 proved the best at discriminatory fingerprinting for Pseudomonas isolates, as it allocated 12 clusters. A correlation between DNA patterns and antibiotic resistance, production of pigments, serotypes distribution, and biofilm formation was not observed, and only confirmed higher genetic heterogeneity among P. aeruginosa isolates, which suggests that other molecular methods are needed to reveal potential relations between genotypic patterns and phenotypic characteristics. [ABSTRACT FROM AUTHOR]

Published
2020
Full Text
View/download PDF

3. Phenotypic and genetic properties of susceptible and multidrug-resistant Pseudomonas aeruginosa isolates in Southern Serbia

Author

Dragana Božić, Željka Nenadović, Marija Petrović, Slaviša Stanković, Marko Milojković, Nataša Stanković Nedeljković, Ivica Dimkić, and Ivana Cirkovic

Subjects
Imipenem, fenotipska obilježja, clinical isolates, Ceftazidime, Aztreonam, Microbial Sensitivity Tests, Toxicology, medicine.disease_cause, phenotypic characteristics, RAPD PCR profiling, Microbiology, 03 medical and health sciences, chemistry.chemical_compound, Antibiotic resistance, multidrug resistance, medicine, Humans, Pseudomonas Infections, 030304 developmental biology, 2. Zero hunger, 0303 health sciences, biology, 030306 microbiology, Pseudomonas aeruginosa, Pseudomonas, Public Health, Environmental and Occupational Health, biology.organism_classification, 3. Good health, Anti-Bacterial Agents, Random Amplified Polymorphic DNA Technique, RAPD PCR profiliranje, višestruka otpornost, Phenotype, chemistry, Doripenem, Colistin, Original Article, klinički izolati, Serbia, medicine.drug
Abstract

Drug resistance of Pseudomonas aeruginosa is a leading problem in hospital infections. The aim of this study was to determine the best molecular genetic discrimination method for Pseudomonas spp. isolates among 94 outpatients and inpatients and see their grouping by phenotype characteristics (biofilm formation, frequency of serotypes, pigmentation, production of different class of beta-lactamases, and susceptibility to different antibiotic classes) and genotype. The most common serotypes were P1, P6, and P11, while co-productions of pyoverdine and pyocyanin were observed in 70 % of isolates. A total of 77.66 % isolates were mostly weak and moderate biofilm producers. Isolates were susceptible to colistin (100 %), aztreonam (97.87 %), imipenem (91.49 %), doripenem (90.43 %), and meropenem (84.04 %). MICs values confirmed susceptibility to ceftazidime and cefepime and singled out meripenem as the most effective inhibitor. Most isolates were resistant to aminoglycosides and fluoroquinolones. Only two isolates produced ESBL, eight were carbapenemase producers, and five isolates produced MBLs. Twenty-nine isolates were multidrug-resistant; 82.8 % of which produced both pigments, 58.3 % were non-typeable, while the P6 and P11 serotypes were equally distributed (16.7 %). Thirteen MDR isolates were strong enzyme producers. RAPD PCR analysis using primer 272 proved the best at discriminatory fingerprinting for Pseudomonas isolates, as it allocated 12 clusters. A correlation between DNA patterns and antibiotic resistance, production of pigments, serotypes distribution, and biofilm formation was not observed, and only confirmed higher genetic heterogeneity among P. aeruginosa isolates, which suggests that other molecular methods are needed to reveal potential relations between genotypic patterns and phenotypic characteristics., Antibiotska rezistencija Pseudomonas aeruginosa vodeći je problem u bolničkim infekcijama. Cilj ovoga istraživanja bio je utvrditi najbolju diskriminatorno molekularno-genetičku metodu među 94 ambulantna i bolnička Pseudomonas spp. izolata kako bi se uvidjelo njihovo grupiranje u smislu različitih fenotipskih obilježja (stvaranje biofilma, učestalost serotipova, pigmentacija, proizvodnja različitih klasa beta-laktamaza i osjetljivost na različite skupine antibiotika) u skladu s genotipom. Najčešći serotipovi bili su P1, P6 i P11, a proizvodnja i pioverdina i piocijanina primijećena je kod 70 % izolata. Ukupno 77,66 % izolata uglavnom je iskazalo slabu i umjerenu proizvodnju biofilma. Izolati su bili osjetljivi na kolistin (100 %), aztreonam (97,87 %), imipenem (91,49 %), doripenem (90,43 %) i meropenem (84,04 %). Vrijednosti MIC-ova potvrdile su podložnost izolata ceftazidimu i cefepimu, a izdvojile su meropenem kao najučinkovitiji inhibitor. Većina izolata bila je otporna na aminoglikozid i fluorokinolon. Samo dva izolata proizvela su ESBL, osam izolata sintetiziralo je karbapenemaze, a pet izolata imalo je sposobnost proizvodnje MBL-a. Dvadeset devet izolata bilo je višestruko rezistentno na antibiotike, od kojih je 82,8 % proizvodilo oba pigmenta, 58,3 % bili su netipabilni, a serotipovi P6 i P11 bili su podjednako zastupljeni među njima (16,7 %). Trinaest MDR izolata bili su snažni proizvođači enzima. RAPD PCR analiza korištenjem 272 početnica pokazala se kao najbolja diskriminatorna metoda otiskom prsta (fingerprinting) za Pseudomonas izolate, izdvajajući čak 12 različitih klastera. U ovom istraživanju nije zabilježena povezanost između DNA obrazaca i otpornosti na antibiotike, proizvodnje pigmenata, distribucije serotipova i stvaranja biofilma, što potvrđuje puno veću genetičku heterogenost unutar samih izolata P. aeruginosa, pod čim se podrazumijeva uključivanje drugih molekularnih metoda u otkrivanju potencijalnih odnosa između genetičkih obrazaca i fenotipskih obilježja.

Published
2020

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