Related Experiment Video
Updated: May 18, 2026

Transformation of Probiotic Yeast and Their Recovery from Gastrointestinal Immune Tissues Following Oral Gavage in Mice
Published on: February 8, 2016
Occurrence and low pressure ultraviolet inactivation of yeasts in real water sources
V J Pereira1, J Ricardo, R Galinha
1Instituto de Biologia Experimental e Tecnológica, Av. República, Qta. do Marquês (EAN), 2784-505 Oeiras, Portugal. vanessarpjp@gmail.com
Abstract:
Low pressure ultraviolet photolysis proved to be an efficient treatment to achieve inactivation of different yeast species (Candida sp., Cryptococcus carnescens, Metschnikowia viticola/Candida kofuensis, Rhodosporidium babjevae, Rhodotorula minuta, and Rhodotorula mucilaginosa) isolated from water sources with very different compositions. The sensitivity degree of various yeast isolates to UV treatment varied among different genera. Species isolated from surface water gained additional photoprotective resistance as a defence mechanism to be able to survive under constant sunlight conditions compared to the groundwater isolates. Yeasts were found to be more resistant to UV treatment than E. coli, Cryptosporidium, and Giardia.
Related Concept Videos
Microbes in Beverage Production
Physical Methods for Controlling Microbial Growth: Radiation and Filtration
Physical Methods for Controlling Microbial Growth: Temperature
Microbes in Food Production
Methods of Sterilization I: Physical Methods
Steam sterilization uses non-toxic, low-cost moist heat in the form of saturated steam under pressure, which is fast, microbicidal, and sporicidal, and quickly warms and penetrates fabrics. Autoclaves, or steam sterilizers, expose each item to direct steam contact for a predetermined time at the necessary...
Microbial Spoilage of Food

