Activity of Bacteriophage D29 Loaded on Nanoliposomes against Macrophages Infected with .

The search for new antimicrobial agents is a continuous struggle, mainly because more and more cases of resistant strains are being reported. (MTB) is the main microorganism responsible for millions of deaths worldwide. The development of new antimicrobial agents is generally aimed at finding strong interactions with one or more bacterial receptors.

Antimicrobial peptides against drug resistant Mycobacterium abscessus.

Mycobacterium abscessus (MAB) comprise rapidly growing, often multidrug-resistant (MDR), nontuberculous mycobacteria responsible for pulmonary and other infections in susceptible hosts. Antimicrobial peptides (APs) are natural and synthetic antimicrobials active against a range of microorganisms including mycobacteria. We evaluated APs activity against MAB reference and clinical strains.

Application of aqueous two-phase micellar system to improve extraction of adenoviral particles from cell lysate.

Viral vectors are important in medical approaches, such as disease prevention and gene therapy, and their production depends on efficient prepurification steps. In the present study, an aqueous two-phase micellar system (ATPMS) was evaluated to extract human adenovirus type 5 particles from a cell lysate. Adenovirus was cultured in human embryonic kidney 293 (HEK-293) cells to a concentration of 1.

Survival of pathogenic Mycobacterium abscessus subsp. massiliense in Acanthamoeba castellanii.

We used an amoeba model to study the intracellular growth and cytotoxicity of clinical strains of Mycobacterium abscessus subsp. massiliense (Mabsm) isolated from 2 patients (one with cystic fibrosis, the other one with idiopathic bronchiectasis) during the early (smooth colonies) and late stage (rough colonies) of chronic pulmonary infection. Acanthamoeba castellanii were infected with Mabsm (MOI 100) and samples collected every 24 h for 72 h.

Complete Genome Sequence of Linezolid-Susceptible Staphylococcus haemolyticus Sh29/312/L2, a Clonal Derivative of a Linezolid-Resistant Clinical Strain.

We report the whole-genome sequence (WGS) of an in vitro susceptible derivative revertant mutant from a bloodstream isolate involved in a nosocomial outbreak in Brazil. The WGS comprises 2.5 Mb with 2,500 protein-coding sequences, 16rRNA genes, and 60 tRNA genes.

Application of BRED technology to construct recombinant D29 reporter phage expressing EGFP.

Bacteriophage Recombineering of Electroporated DNA (BRED) has been described for construction of gene deletion and point mutations in mycobacteriophages. Using BRED, we inserted a Phsp60-egfp cassette (1143 bp) into the mycobacteriophage D29 genome to construct a new reporter phage, which was used for detection of mycobacterial cells. The cassette was successfully inserted and recombinant mycobacteriophage purified.

Plasmid-based controls to detect rpoB mutations in Mycobacterium tuberculosis by quantitative polymerase chain reaction-high-resolution melting.

Quantitative polymerase chain reaction-high-resolution melting (qPCR-HRM) analysis was used to screen for mutations related to drug resistance in Mycobacterium tuberculosis. We detected the C526T and C531T mutations in the rifampicin resistance-determining region (RRDR) of the rpoB gene with qPCR-HRM using plasmid-based controls. A segment of the RRDR region from M.

Interventions for wound healing among diabetic patients infected with Staphylococcus aureus: a systematic review.

Context And Objective: Staphylococcus aureus is the most frequent agent isolated in diabetic foot infections and may be associated with changes to wound healing times. The aim of this study was to perform a systematic review of the literature, including studies that assessed the efficacy of any clinical or surgical intervention, as well as oral or topical therapy for diabetic ulcers infected with S. aureus.

In vitro synergic effect of beta-lapachone and isoniazid on the growth of Mycobacterium fortuitum and Mycobacterium smegmatis.

Nontuberculous mycobacteria are ubiquitous and saprophytic organisms that have been implicated in a wide spectrum of diseases due to an increasing number of immunocompromised patients. The natural resistance of atypical mycobacteria to classical antituberculous drugs has encouraged research into new chemotherapeutic agents and drug combinations. The aim of this study was to determine the in vitro antimycobacterial activities of (2)-lapachone alone and in combination with isoniazid against Mycobacterium fortuitum and Mycobacterium smegmatis via the Time-Kill Curve method.

Bacteriophage: laboratorial diagnosis and phage therapy.

Bacteriophages have been researched as a new alternative to antibiotics. These viruses inject their genetic material into bacteria and use their host machinery to multiply themselves. The research of bacteriophages in Brazil will certainly provide low-cost treatment of multidrug resistant bacteria, new microbiological diagnosis and advantages for the Brazilian food industry.