CONJUNCTIVA IN HEALTH AND DISEASE 
105 
TABLE II 
Organisms found in the Normal Conjunctival Sac 
Xerosis bacillus (Table IV, No. i) ... ... ... ... 120 times 
Staphylococcus epidermidis albus (Welch) ... ... ... 47 ,, 
Staphylococcus pyogenes aureus ... ... ... ... 8 „ 
Staphylococcus pyogenes citreus ... ... ... ... 1 
Staphylococcus pyogenes albus ... ... ... ... 14 ,, 
Staphylococcus cereus flavus ... ... ... ... 1 ., 
Staphylococcus cereus albus .. . ... ... ... ... 2 ,, 
Streptococcus pyogenes longus ... ... ... ... 8 ,, 
Streptococcus brevis... ... ... ... ... ... 12 „ 
Pneumococcus (Fraenkel) ... ... ... ... ... 2 ,, 
Bacillus lacunatus (Eyre) ... ... ... ... ... 9 ,, 
Bacillus mesentericus ruber .. . ... ... ... ... 2 
Bacillus subtilis ... ... ... ... ... ... 1 ,, 
Bacillus capsulatus mucosus .. . ... ... ... ... 1 ,, 
Bacillus coli communis ... ... ... ... ... 1 „ 
Bacillus striatus flavus ... ... ... ... ... 2 ,, 
' Red bacillus ' ... ... ... ... ... ... 2 ,, 
Sarcina lutea .. ... ... ... ... ... ... 3 „ 
Micrococcus tetragenus ... ... ... ... ... 1 ,, 
Proteus vulgaris ... ... ... ... ... ... 1 „ 
Penicillium glaucum . . . ... ... ... ... ... 1 ,, 
Cladothrix (white) ... ... ... ... ... ... 1 ,, 
Cladothrix (brown) ... ... ... ... ... ... 1 ,, 
Table III, No. 1 3 „ 
Table III, No. 2 I ,, 
Table III, No. 4 1 „ 
Table III, No. 5 1 „ 
Table III, No. 6 2 „ 
Table IV, No. 2 1 „ 
Table IV, No. 3 2 „ 
Only forty-seven out of the total number of sacs examined were sterile. 
The xerosis bacillus and bacilli of the diphtheria group were found one 
hundred and twenty-three times, fifty-two times in pure culture, twenty-four 
associated with the staphylococcus epidermidis albus and forty-seven in mixed culture. 
The frequency with which this bacillus occurred suggested that with a more 
complete examination many of the sterile sacs would have shown the presence of one 
or two organisms. 
It was impossible to make such a systematic examination of all the sterile 
eyes. In a few cases, however, a number of tubes were inoculated from eyes which 
had been sterile to one examination, and usually in one of the tubes a single colony 
of xerosis bacillus or staphylococcus epidermidis albus was found. It is not unlikely 
o 
