A flat, colorless colony is isolated on MacConkey from a sto…

A flat, colorless colony is isolated on MacConkey from a stool specimen. The isolate has an Alkaline/Acid reaction on TSI with gas and abundant H2S production.  The citrate utilization test, ornithine and lysine decarboxylation tests, and methyl red tests are all positive.  The laboratory scientist should report:

Three separate venipunctures were used to collect blood for…

Three separate venipunctures were used to collect blood for culture from a patient with an artificial heart valve. The following results were obtained: • Culture 1: coagulase-negative staphylococci• Culture 2: coagulase-negative staphylococci• Culture 3: coagulase-negative staphylococci These results indicate: