Make a Dichotomous Key using the folowing bacteria to ultimately isolate the following organims using PEA,...

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Biology

Make a Dichotomous Key using the folowing bacteria to ultimatelyisolate the following organims using PEA, gram stain, catalasetest, oxidase test, MSA, etc.:

Proteus                         Acinetobacter                     Staphylococcus                   Micrococcus

Lactobacillus                Salmonella                          Escherichia                          Neisseria

Bacillus                         Shingella                            Klebsiella                            Citrobacter

Serratia                         Enterobacter                       Pseudomonas                      Streptococcus

Answer & Explanation Solved by verified expert
4.4 Ratings (594 Votes)

Bacteria

PEA

Gram Stain

Catalase Test

Oxidase Test

Proteus

Inhibits the growth

Negative

Positive

Negative

Lactobacilllus

Promotes the growth

Positive

Negative

Negative

Bacillus

Promotes the growth

Positive

Positive

Negative

Serratia

Inhibits the growth

Negative

Positive

Negative

Acinetobacter

Inhibits the growth

Negative

Positive

Negative

Salmonella

Inhibits the growth

Negative

Positive

Negative

Shingella

Inhibits the growth

Negative

Positive

Negative

Enterobacter

Inhibits the growth

Negative

Positive

Negative

Staphylococcus

Promotes the growth

Positive

Positive

Negative

Escherichia

Inhibits the growth

Negative

Positive

Negative

Klebsiella

Inhibits the growth

Negative

Positive

Negative

Pseudomonas

Inhibits the growth

Negative

Positive

Negative

Micrococcus

Promotes the growth

Positive

Positive

Positive

Neisseria

Inhibits the growth

Negative

Positive

Positive

Citrobacter

Inhibits the growth

Negative

Positive

Negative

Streptococcus

Promotes the growth

Positive

Negative

Negative

PEA Test – Phenylethyl alcohol agar (PEA) is a selective medium test which is specific for gram positive bacteria. The selective medium inhibits the growth of gram negative bacteria and promotes growth of gram positive ones.


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