Sterilization and Disinfection — MCQs

Which is false regarding Spaulding's criteria?

What is the preferred method for sterilizing disposable syringes?

Heat-labile liquids are sterilized by?

Which of the following agents is both a disinfectant and an antiseptic?

All of the sterilization methods are properly matched except?

What is the primary use of the freezing method in microbiology?

Fibreoptic scopes are sterilized by

A 25-year-old male from a flood-affected area presents with sudden onset of profuse, painless, rice-water diarrhoea and severe dehydration. Stool is collected and inoculated onto selective media. The plate after 18 hours of incubation at 37°C is shown (Image 1). Which single biochemical or growth characteristic of the organism forming these colonies best explains why this selective medium differentiates it from non-pathogenic vibrios such as Vibrio parahaemolyticus?

Which of the following infections can be transmitted to a baby during delivery?

2x10^2 Streptococcus viridans are inoculated into a flask containing one liter of enriched broth. If the lag time is 30 minutes and the generation time is 20 minutes, how many bacteria will there be in the culture after two and a half hours?