<Ul> <Li> Nutrient agar is usually used for growth of nonfastidious organisms and observation of pigment production . It is safe to use in school science laboratories because it does not selectively grow pathogenic bacteria . </Li> <Li> Önöz agar allows more rapid bacteriological diagnosis, as Salmonella and Shigella colonies can be clearly and reliably differentiated from other Enterobacteriaceae . The yields of Salmonella from stool samples obtained, when using this medium, are higher than those obtained with LEIFSON agar or Salmonella--Shigella agar . </Li> <Li> Phenylethyl alcohol agar selects for Staphylococcus species while inhibiting Gram - negative bacilli (e.g., Escherichia coli, Shigella, Proteus, etc .). </Li> <Li> R2A agar, a nonspecific medium, imitates water, so is used for water analysis . </Li> <Li> Tryptic (trypticase) soy agar (TSA) is a general - purpose medium produced by enzymatic digestion of soybean meal and casein . It is frequently the base medium of other agar types; for example, blood agar plates are made by enriching TSA plates with blood . TSA plates support growth of many semifastidious bacteria, including some species of Brucella, Corynebacterium, Listeria, Neisseria, and Vibrio . </Li> <Li> Xylose - lysine - deoxycholate agar is used for the culture of stool samples and contains two indicators . It is formulated to inhibit Gram - positive bacteria, while the growth of Gram - negative bacilli is encouraged . The colonies of lactose fermenters appear yellow . It is also used to culture possible Salmonella that may be present in a food sample . Most Salmonella colonies produce a black centre on it . </Li> <Li> Cetrimide agar is used for the selective isolation of the Gram - negative bacterium Pseudomonas aeruginosa . </Li> <Li> Tinsdale agar contains potassium tellurite, which can isolate Corynebacterium diphteriae . </Li> </Ul> <Li> Nutrient agar is usually used for growth of nonfastidious organisms and observation of pigment production . It is safe to use in school science laboratories because it does not selectively grow pathogenic bacteria . </Li> <Li> Önöz agar allows more rapid bacteriological diagnosis, as Salmonella and Shigella colonies can be clearly and reliably differentiated from other Enterobacteriaceae . The yields of Salmonella from stool samples obtained, when using this medium, are higher than those obtained with LEIFSON agar or Salmonella--Shigella agar . </Li> <Li> Phenylethyl alcohol agar selects for Staphylococcus species while inhibiting Gram - negative bacilli (e.g., Escherichia coli, Shigella, Proteus, etc .). </Li>

Which of the following is produced by adding 1 to 5 agar