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1+ reaction has numerous small clumps and cloudy red supernatant

2+ has many medium-sized clumps and clear supernatant.

3+ has several large clumps and clear supernatant

4+ has one solid clump, no free cells, and clear supernatant

BB

Tube-based agglutination reactions in blood bank are graded from negative (0) to 4+. A reaction that has numerous small clumps in a cloudy, red background is:

Molarity x Molecular Weight x Volume = Grams

Molecular Weight (aka Formula Weight) =

2(1) + 32 + 4(16) = 98

So, 4 x 98 x 0.2L = 78.4g

What weight of H2SO4 is contained in 200 ml of a 4 molar H2SO4 solution? (Atomic weight: H= 1; S = 32; 0 = 16)

Which specimen should be collected last?

Question options:

The characteristic that distinguishes vancomycin-resistant Enterococcus faecium and Enterococcus faecalis from other Enterococcus species is their lack of motility.

Enterococci are all catalase-negative. Growth on bile esculin agar and in 6.5% salt broth are two characteristics that have commonly been used to identify Enterococcus to the genus level. A positive esculin in combination with a positive PYR reaction is another approach to presumptive identification.

Which one of these characteristics distinguishes vancomycin-resistant Enterococcus faecium and Enterococcus faecalis from other Enterococcus species?