water sample could be (-) for coliforms when tested by PMF method, could this water still be a major public health threat and why?

These are examples of the 5 rules of asepsis, except: 1. Any item used for patient care or that is visibly soiled must be considered "dirty" and "contaminated" 2. If the item has been cleaned with a detergent disinfectant, it is both clean and decontaminated 3. Sterile items are devices processed by steam, dry heat, ethylene oxide or other sterilization method to kill most organisms 4. Dirty, clean and sterile items must be separated at all times

I just did an acute toxicity experiment using treated and non-treated effluents with daphnia magna and my mortality rate was higher in the treated effluent. My question is why is treated pulp effluent more harmful than non-treated pulp effluent on daphnia magna? If possible please provide links for references, this is not an easy topic to find.

of 1 stion s page 30- F2 Which of the following terms is associated with the probability of a preparation not being sterile after it has been exposed to a sterilization process? Select one: Oa. Particulate Matter level Qb. Sterility Assurance level О с. Pyrogen Load level O d. Optimal Sterilization level F3 F4 F5 Ol پیار Q Search F6 F7 F8 F9 === 8 9 F10 Time left 22:34:03 F11 Next page

Please give explanation for each step other give dislike

In a(n) _________ test, the effectiveness of a microbial control agent is compared to that of carbolic acid.   Question options:   use-dilution   in-use   Kelsey-Sykes capacity   phenol coefficient   Entner-Doudoroff   algebra

What are the advantages and disadvantages of nitrogen reduction test? Thank you

Below is an image of 3 different bacteria, letter labeld, growing on MacConkey Agar. Note that bacteria such as E. coli use mixed acid fermentation, with very high acid production which will cause a colored precipitation around colonies on MacConkey agar. MacConkey Agar C

Create a flow chart to perform the required tests to identify unknown microorganism: - Use at least 3 other biochemical tests from the following list: Mannitol salt agar, Blood agar, Starch agar, Tributyrin Agar, Gelatin, Casein agar, Indole Production, MR-VP, Citrate, Hydrogen Sulfide test, Urease test, Nitrate reduction test, Catalase test, and Oxidase test. The Gram positive organisms that could be present in your unknown mixture are: Bacillus cereus, Micrococcus luteus, Staphylococcus aureus, Staphylococcus epidermidis and Lactococcus lactis.

Please answer fast Dilution Problem. A culture of Staphylococcus is diluted as follows: (1) 20mL are added to 80mL of water. (2) 10uL from (1) are then added to 9.99mL of water. (3) A 10-2 dilution is made from tube # (2). (4) 100uL from (3) are plated for a pour plate and incubated.   Growth Problem.A culture with approximately 2x103 cells/mL were incubated. After 3 hours, the number of cells had increased to 3x105. a) How long was the generation time in minutes?b) How many generations have occurred