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A.R.E.O. Xavier

Publications of : A.R.E.O. Xavier
Microbial Genetics   Research Article

Genetic diversity of Bacillus sp producers of amylase isolated from the soil

The microorganisms are the best source of extracellular enzymes since they allow an economical technology with low-resource consumption compared to animals and plants. The amylases are among the most important enzymes being the genus Bacillus one of the most investigated due to its ability to produce this enzyme. The objective of this study was to isolate and analyz.. Read More»

Genet. Mol. Res. 16(3): gmr16039771

DOI: 10.4238/gmr16039771

Microbial Genetics   Research Article

Characterization and molecular epidemiology of extensively prevalent nosocomial isolates of drug-resistant Acinetobacter spp

    A.A. Carvalho, L.L. Cardoso, H.S. Nogueira, E.V. Menezes, M.A.S. Xavier, N.A.P. Barreto, L.F. Fernandes and A.R.E.O. Xavier

Acinetobacter sp isolates deserve special attention once they have emerged globally in healthcare institutions because they display numerous intrinsic and acquired drug-resistance mechanisms. This study assessed the antibiotic susceptibility profile, the presenceof the genetic marker blaOXA-23, and the clonal relationship among 34 nosocomial isolates of Acinetobacter spp obtained at a hospital .. Read More»

Genet. Mol. Res. 15(3): gmr.15038608

DOI: 10.4238/gmr.15038608

Human Genetics   Research Article

Standardization of a molecular method for epidemiologic identification of Leishmania strains

    R.F. Rocha, E.V. Menezes, A.R.E.O. Xavier, V.A. Royo, D.A. Oliveira, A.F.M. Júnior, E.S. Dias, A.C.V.M.R. Lima and E.M. Michalsky

Molecular studies of the evolutionary relationships among Leishmania species suggest the presence of high genetic variation within this genus, which has a direct effect on public health in many countries. The coexistence of species in a particular region can result in different leishmaniasis clinical forms and treatment responses. We aimed to standardize the kinetop.. Read More»

Genet. Mol. Res. 15(4): gmr.15048854

DOI: 10.4238/gmr.15048854

Microbial Genetics   Research Article

Genetic markers for detection of Escherichia coli K-12 harboring ampicillin-resistance plasmid from an industrial wastewater treatment effluent pond

    G.A.R. Simões, M.A.S. Xavier, D.A. Oliveira, E.V. Menezes,S.S.G. Magalhães, J.A.C.D. Gandra and A.R.E.O. Xavier

Biotechnology industries that use recombinant DNA technology are potential sources for release of genetically modified organisms to the environment. Antibiotic-resistance marker genes are commonly used for recombinant bacteria selection. One example is the marker gene coding for β-lactamase (bla) in plasmids found in Escherichia coli K-12. The aim of this study.. Read More»

Genet. Mol. Res. 15(2): gmr.15028528

DOI: 10.4238/gmr.15028528

Microbial Genetics   Research Article

Phenotypic and genotypic characterization of Staphylococcus aureus isolates in milk from flocks diagnosed with subclinical mastitis

    A.R.E.O. Xavier, A.C. Almeida, C.N. Souza, L.M.V Silva, A.X.A. Ruas, D.A. Sanglard, A.F.M. Júnior , A.M.E. Oliveira and M.A.S. Xavier

The Staphylococcus aureus is the most common isolated microorganism in ruminant animal species diagnostic with clinical or subclinical mastitis. Dairy herds with these diseases can transfer S. aureus into the milk supply, which can lead to food poisoning in humans. The objective of this study was to evaluate the profile of antimicrobial susceptibility, the presence .. Read More»

Genet. Mol. Res. 16(2): gmr16029709

DOI: 10.4238/gmr16029709