Some environmental bacteria produce indoleacetic acid (IAA), which promotes root stimulation and promotes defense against phytopathogens. This phytohormone is regulated by environmental conditions such as temperature for its production. Therefore, the present research work was carried out, where the optimal temperature for the production of IAA from microbial fermentation in a Bioflo - Celligen bioreactor was evaluated, using a Bacillus subtilis strain. This strain was cultivated in Nutritive Broth liquid medium to obtain its growth curve at different temperatures and incubation times. IAA production was carried out evaluating different incubation temperatures (28, 29, 30 and 32 °C) in a completely randomized design. Regarding temperature, the influence of 28, 29, 30 and 32 ° C was evaluated in a completely randomized design. The yield of IAA obtained in each treatment to be determined...

Background and Objectives: In Peru, the presence of antimicrobial-resistant bacteria is a constant concern in hospitals and has likely increased in frequency during the pandemic. The objective of the study was to analyze the frequency of carbapenemase-producing bacteria resistant to two carbapenems (Imipenem and Meropenem), which were isolated from Peruvian patients in the intensive care unit of the Victor Lazarte Echegaray Hospital in Trujillo (Peru) during the COVID-19 pandemic. Materials and Methods: The biological samples of the patients hospitalized in the ICU were processed in the Microbiology Diagnostic Laboratory of the Víctor Lazarte Echegaray Hospital between May 2021 and March 2022. Antimicrobial sensitivity was determined with the automated system AutoScan-4, and for the identification of the type of carbapenemase, the RESISIT-3 O.K.N K-SET cassettes were used. Results: The ...

Heavy metal contamination of water is a widespread problem in Peru and represents a potential threat to the ecosystem. Bacteria are an ecological alternative to treating these effluents. This research aims to determine the influence of temperature and pH on the lead (Pb) bioremoval in surface water using Serratia marcescens under laboratory conditions. The sample was collected from a stream located in Santiago de Chuco City (Peru). Treatments (T) were carried out by combining pH (5 and 7) and temperature (25, 30, and 35 °C). The bacterial inoculum (S. marcescens) was 3 × 108 CFU/mL, which was constant in all treatments. The lead bioremoval evaluation was performed in an airlift bioreactor and the incubation time was 24 h. The total lead concentration was determined using atomic absorption spectrophotometry. The results show that treatment 6 (temperature: 35 °C, pH: 5, and inoculum: 3 ...