Table 2.

Spectrum of bacteria implicated in contamination of lenses in residents and consultants

Bacterial contamination	Lenses from residents	Lenses from consultants
CNSA: median	4	1
CNSA: mean	9	3
CNSA: range	0–71	0–26
SA: median	0	0
SA: mean	0	0
SA: range	0–7	0–6
Micr.: median	0	0
Micr.: mean	0	0
Micr.: range	0–3	0–1
Aerob.: median	1	0
Aerob.: mean	0	2
Aerob.: range	0–9	0–36

Aerob. aerobic bacteria, CNSA coagulase-negative Staphylococcus aureus, Micr. Micrococcus, SA Staphylococcus aureus