Lab

Question 1

Sterile body sites

Answer 1

Blood, CSF, pleural fluid, urine, synovial fluid, pericardial fluid, peritoneal fluid

Question 2

Individual isolates susceptibility report

Answer 2

Obtain specimen from patient of interest and have lab test susceptibility of organism to various abx. Move from broad spectrum treatment to targeted abx treatment.

Question 3

Hospital susceptibility report

Answer 3

hospitals report indicating organisms isolated on inpt and susceptibility to abx. Allows emperic therapy

Question 4

Normally colonizing bacteria

Answer 4

Skin, GU, GI, Resp

Question 5

Blood culture

Answer 5

Seeking out systemic infection- blood = sterile. Interpret 24-48hrs

Question 6

Sputum culture

Answer 6

Inducing sputum is hard. Testing for pneumonia or Tb. Determine specimen to cover organisms

Question 7

Sputum Gram stain

Answer 7

Neither sensitive nor specific

Question 8

Viral culture

Answer 8

Requires cell cultures- cytopathic changes indicate viral infection

Question 9

Fungal culture

Answer 9

Sabiuraud’s agar-inhibiting bacterial growth. Takes weeks for fungal growth

Question 10

Fungal Serology

Answer 10

Presence of Abs in serum or CSF- systemic mycoses. Rise must be significant

Question 11

Acid Fast Stain

Answer 11

Mycobacteria. Neither gram + or -. M. Tb, M leprae, M avium

Question 12

Mycoplasma serology

Answer 12

Clinical Dx of M. Pnemoniae

Question 13

Cold agglutinin test

Answer 13

M. pneumonia, adnovirus, mono- cause autoimmune Abs that agglutinate at 4 C

Question 14

Determine bacteremia

Answer 14

Blood culture- results 24-48 hrs