scholarly journals Effect of sulfonylurea tribenuron methyl herbicide on soil Actinobacteria growth and characterization of resistant strains

2018 ◽  
Vol 49 (1) ◽  
pp. 79-86 ◽  
Author(s):  
Kounouz Rachedi ◽  
Ferial Zermane ◽  
Radja Tir ◽  
Fatima Ayache ◽  
Robert Duran ◽  
...  
Keyword(s):  
Resistant Strains ◽  
Tribenuron Methyl

scholarly journals Isolation and characterization of arsenic resistant soil bacteria and their effects on germination of rice under arsenic contamination

2015 ◽  
Vol 2 (2) ◽  
pp. 229-237
Author(s):  
Istiaq Ahmed ◽  
Md Tofazzal Islam ◽  
Md Akhter Hossain Chowdhury ◽  
Md Kamruzzaman
Keyword(s):  
Contaminated Soils ◽  
Sodium Arsenite ◽  
Agar Plate ◽  
Rice Seedling ◽  
Resistant Bacteria ◽  
Gram Staining ◽  
Isolation And Characterization ◽  
Resistant Strains

This study was carried out to isolate, screen and characterize arsenic (As) resistant bacteria from As contaminated soils of Dumrakandi and Matlab under Faridpur and Chandpur districts and to evaluate their efficiency in reducing As toxicity against rice seedlings during germination. Thirteen strains were isolated from the soils which showed resistance to different levels of sodium arsenite (viz. 5, 10, 20 and 40 mM) in both agar plate and broth assay using BSMY I media. Among the isolates, BTL0011, BTL0012, BTL0015 and BTL0022 showed highest resistance to 40 mM sodium arsenite. Gram staining and KOH solubility test revealed that five strains were gram positive and rest eight was gram negative. They grew well in the liquid media at pH 5.5 to 8.5. In-vitro rice seedling bioassay with two superior isolates (BTL0011 and BTL0022) revealed that As resistant strains significantly enhanced seed germination of BRRI dhan29 and BRRI dhan47 at 60 ppm As. This study was laid out in CRD with three replications. The performance of BTL 0022 was superior to BTL0011. The overall results suggest that BTL0011 and BTL0022 can be used for bioremediation of As contaminated soils and to increase the germination and seedling growth of rice in As contaminated soils.Res. Agric., Livest. Fish.2(2): 229-237, August 2015

Characterization of swine isolates of Clostridium difficile in Spain: A potential source of epidemic multidrug resistant strains?

Anaerobe ◽  
2013 ◽  
Vol 22 ◽  
pp. 45-49 ◽  
Author(s):  
Teresa Peláez ◽  
Luis Alcalá ◽  
José L. Blanco ◽  
Sergio Álvarez-Pérez ◽  
Mercedes Marín ◽  
...  
Keyword(s):  
Clostridium Difficile ◽  
Multidrug Resistant ◽  
Potential Source ◽  
Resistant Strains

Molecular and Epidemiological Characterization of Enterobacterial Multidrug-Resistant Strains in Tlemcen Hospital (Algeria) (2008–2010)

2013 ◽  
Vol 19 (3) ◽  
pp. 185-190 ◽  
Author(s):  
Zaket Baba Ahmed-Kazi Tani ◽  
Dominique Decré ◽  
Nathalie Genel ◽  
Zahia Boucherit-Otmani ◽  
Guillaume Arlet ◽  
...  
Keyword(s):  
Multidrug Resistant ◽  
Resistant Strains ◽  
Epidemiological Characterization

scholarly journals Biosorption potential and molecular characterization of metal resistant autochthonous microbes from tannery solid waste

2021 ◽  
Author(s):  
Hajira Younas ◽  
Aisha Nazir ◽  
Zakia Latif ◽  
Janice E Thies ◽  
Muhammad Shafiq ◽  
...  
Keyword(s):  
Solid Waste ◽  
Its Region ◽  
Metal Resistance ◽  
Molecular Techniques ◽  
Bacterial Strains ◽  
Fungal Strains ◽  
Resistant Strains ◽  
Tannery Solid Waste ◽  
Clean Metal

This study encompasses isolation and screening of heavy metal-resistant fungal and bacterial strains from tannery solid waste (TSW). Twelve fungal strains and twenty-five bacterial strains were isolated from TSW. The growth of fungal strains was observed against different heavy metals ranging from 10 mg L -1 to 1050 mg L -1 and the growth of bacteria was observed in metal concentrations ranging from 10 mg L -1 to 1200 mg L -1 . Five multi-metal resistant fungal isolates belonging to the genus Trichoderma and ten bacterial isolates belonging to the genus Bacillus showed good metal resistance and biosorption potential. They were identified through molecular techniques, fungi based on ITS region ribotyping, and bacteria based on 16S rRNA ribotyping. The fungal strains were characterized as T. hamatum (TSWF-06), T. harzianum (TSWF-11), T. lixii (TSWF-02) and T. pseudokoningii (TSWF-03, TSWF-10). The bacterial strains were characterized as Bacillus xiamenensis (TSW-02), B. velezensis (TSW-05), B. piscis (TSW-06), B. safensis (TSW-10), B. subtilis (TSW-14, TSW-15, TSW-17) B. licheniformis (TSW-19), B. cereus (TSW-20) and B. thuringiensis (TSW-22). The fungal strains namely, T. pseudokoningii (TSWF-03) and T. harzianum proved to be two multi-metal resistant strains with good biosorption efficiency. Unlike fungi, bacterial strains showed metal specific resistance. The strains Bacillus xiamenensis , B. subtilis (TSW-14) and B. subtilis (TSW-15) showed good biosorption efficiency against Cr, B. safensis against Cu, B. piscis and B. subtilis (TSW-17) against Pb and B. licheniformis and B. thuringiensis against Zn. The autochthonous fungal and bacterial strains can therefore be employed to clean metal contaminated environments.

scholarly journals Streptococcus suis in Brazil: Genotypic, Virulence, and Resistance Profiling of Strains Isolated from Pigs between 2001 and 2016

Pathogens ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 31 ◽  
Author(s):  
Carlos E. C. Matajira ◽  
Luisa Z. Moreno ◽  
Andre P. Poor ◽  
Vasco T. M. Gomes ◽  
Andressa C. Dalmutt ◽  
...  
Keyword(s):  
Streptococcus Suis ◽  
Multidrug Resistant ◽  
Swine Industry ◽  
Pfge Typing ◽  
Resistance Selection ◽  
Important Challenge ◽  
Resistant Strains ◽  
Resistance Rates ◽  
Isolation Period

Streptococcus suis remains an important challenge for the worldwide swine industry. Considering that Brazil is a major pork producer and exporter, proper monitoring of the pathogen and resistance rates are required. We present here the characterization of Brazilian S. suis strains isolated over a 15 year period by pulsed-field gel electrophoresis (PFGE) typing, capsular, virulence, and antimicrobial resistance profiling. Serotype prevalence revealed a predominance of serotype 2/½ followed by 3, 7, 1/14, 6, 8, 18, 28, and 27; the latter had not yet been reported in Brazil. Resistance profiling enabled the differentiation of nine profiles presenting resistance to three and up to eight antimicrobial classes. Even though an association between the most resistant strains and isolation year starting from 2009 was observed, a high frequency of multidrug-resistant strains isolated from 2001 to 2003 was also detected. This suggests that despite the isolation period, S. suis strains already presented high resistance selection pressure. A slight association of serotype 2/½ with some virulence profiles and PFGE pulsotypes was also identified. Nevertheless, no clonal dispersion or persistency of clones over the analyzed years and herds was detected.

scholarly journals Characterization of New Mutations in Pyrazinamide-Resistant Strains of Mycobacterium tuberculosisand Identification of Conserved Regions Important for the Catalytic Activity of the Pyrazinamidase PncA

1999 ◽  
Vol 43 (7) ◽  
pp. 1761-1763 ◽  
Author(s):  
Nadine Lemaitre ◽  
Wladimir Sougakoff ◽  
Chantal Truffot-Pernot ◽  
Vincent Jarlier
Keyword(s):  
Mycobacterium Tuberculosis ◽  
Catalytic Activity ◽  
Insertion Sequence ◽  
Bacterial Species ◽  
Homologous Proteins ◽  
Conserved Regions ◽  
Resistant Strains ◽  
New Mutations

ABSTRACT A new set of mutations, including transposition of the insertion sequence IS6110, was identified in the pncAgene from 19 pyrazinamide-resistant Mycobacterium tuberculosis strains. Alignment of the PncA protein from M. tuberculosis with homologous proteins from different bacterial species revealed three highly conserved regions in PncA which may play an important role in the processing of pyrazinamide.

scholarly journals Antimicrobial susceptibility and molecular characterization of Salmonella serovar Ndolo isolated from outbreaks in cattle and horses

2018 ◽  
Vol 48 (12) ◽  
Author(s):  
Carolina Pantuzza Ramos ◽  
Rafael Gariglio Clark Xavier ◽  
Carlos Augusto Gomes Leal ◽  
Elias Jorge Facury Filho ◽  
Antonio Ultimo de Carvalho ◽  
...  
Keyword(s):  
Clavulanic Acid ◽  
Antimicrobial Susceptibility ◽  
Virulence Genes ◽  
Susceptibility Testing ◽  
Domestic Animals ◽  
Amoxicillin Clavulanic Acid ◽  
Resistant Strains ◽  
Human Infections ◽  
First Time

ABSTRACT: The present study aimed to describe and characterize, for the first time, two outbreaks of salmonellosis caused by Salmonella Ndolo in foals and calves in Brazil and compare the isolated strains with S. Ndolo previously identified in asymptomatic reptiles. The affected calves and foals presented fever, lethargy, and profuse diarrhea. Isolated strains were subjected to antimicrobial susceptibility testing, characterized according to virulence genes, and fingerprinted by ERIC-PCR. Salmonella Ndolo was identified in fecal samples from two foals and four calves. One isolate from a calf was resistant to amoxicillin/clavulanic acid, trimethoprim/sulfamethoxazole, and florfenicol. Strains from two other calves were resistant to oxytetracycline. All virulence genes tested were present in the isolates, and two major clusters of closely related strains were identified by ERIC-PCR, each per outbreak. This is the first report of Salmonella Ndolo infection in domestic and symptomatic animals. Previously, this serovar had been identified only in human infections. The presence of relevant virulence genes in all Salmonella Ndolo isolates and the detection of antimicrobial multi-resistant strains highlighted the importance of monitoring serovars associated with salmonellosis in domestic animals.

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