ABSTRACT
This study aimed to review the clinical characteristics of patients with Aerococcus spp. detected by blood culture, and drug susceptibility of Aerococcus spp. All cases of Aerococcus spp. determined using blood culture between June 2013 and May 2020 in a single institution were included; patient information (age, sex, comorbidities, outcome, diagnosis, antimicrobial agents) was analyzed. The cohort comprised 25 patients (18 [72%] men and 7 [28%] women; median age, 84.5 [range, 75-87] years). Thirteen (52%) patients had urinary tract infections(UTI) caused by Aerococcus spp. All patients had a favorable prognosis, except 1 who died owing to infective endocarditis. Drug susceptibility testing showed that most isolates were susceptible to ß-lactams except 1. However, 24 (96%) cases were resistant to trimethoprim-sulfamethoxazole and 10 (40%) to quinolones. Aerococcus spp. are important causative agents of bacteremia and UTI. The increasing reports of Aerococcus spp. infections could lead to better treatment schemes and facilitate diagnosis.
Subject(s)
Aerococcus/drug effects , Aerococcus/isolation & purification , Anti-Bacterial Agents/pharmacology , Blood Culture , Gram-Positive Bacterial Infections/blood , Aerococcus/genetics , Aerococcus/growth & development , Aged , Aged, 80 and over , Drug Resistance, Multiple, Bacterial , Female , Humans , Male , Microbial Sensitivity Tests , Prognosis , Urinary Tract Infections/microbiologyABSTRACT
Chlorate reduction by the strain Aerococcus dechloraticans TGS-463 immobilized on the corncob under flow conditions has been studied. It has been established that under growth in the medium with chlorate the increase of the dilution rate (D) results in the lower efficacy of the process, i.e., a higher concentration of residual chlorates in the medium and a lower rate of chlorate reduction. The optimal D for chlorate reduction ranges from 1.12 to 1.5 hour(-1).
Subject(s)
Aerococcus/growth & development , Chlorates/chemistry , Water Pollutants, Chemical/chemistry , Biodegradation, Environmental , Biotechnology/instrumentation , Biotechnology/methods , Cellulose/chemistry , Chlorates/analysis , Equipment Design , Oxidation-Reduction , Water Pollutants, Chemical/analysis , Water Purification/instrumentation , Water Purification/methodsABSTRACT
A possibility of chlorates reduction at the joint growing of chlorate-reducing and cellulose-degrading bacteria on the medium with paper as a carbon source was proved. The growth rate of associative culture on the medium with paper was by 18-25% lower than that on MPB. Enrichment culture of cellulose-degrading bacteria can reduce up to 10% of added chlorates. Ethanol is the cellulose hydrolysis product which is primarily consumed under chlorate reduction; then follows the consumption of acetic and propionic acids.
Subject(s)
Aerococcus/growth & development , Cellulose/chemistry , Chlorates/analysis , Water Pollutants, Chemical/analysis , Water Purification/methods , Oxidation-ReductionABSTRACT
A mathematical model has been offered which describes adequately the process of chlorates reduction by Aerococcus dechloraticans TGS-463 culture, the component of sewage from production of ignition mixtures being available in the medium. It is shown that chromates, trivalent iron and zinc take the most negative effect on the rate of chlorates utilization (by the degree of decrease). Phosphates have no effect on chlorate-reduction.