CONJUNCTIVITIS 115 



10 cases of purulent catarrh : 



3 containing Koch- Weeks. 



1 Koch-Weeks+ Subtilis. 



1 Pneumococci. 

 5 ,, Gonococci. 



18 cases of ophthalmia neonatonun : 



2 containing Koch- Weeks. 

 7 Pneumococci. 



10 Gonococci (pure). 



1 ,, Gonococci+ Streptococci. 



1 ,, Gonococci+ Koch-Weeks. 



1 ,, Gonococci+ Pneumococci. 



1 negative. 



2 cases of membranous conjunctivitis contained Staphy locoed. 



16 cases of phlyctenular conjunctivitis were negative. 



10 cases of catarrh were complicated with blepharitis, of which 



2 contained Diplobacilli. 



5 ,, Staphylococci. 

 2 ,, Staphylococci+ Streptococci. 

 1 was negative. 



The aggregate of 361 cases of conjunctivitis was : 

 189 Koch-Weeks. 

 62 Diplobacilli (Morax-Axenfeld). 

 9 Pneumococci. 



3 Pneumococci+ Diplobacilli. 

 17 Gonococci (pure). 



4 Gonococci + others. 

 13 Staphylococci. 



2 Staphylococci + Streptococci. 

 1 Koch- Weeks + Subtilis. 



299 positive results, in contrast with 62 

 indeterminate or negative. 



Pollock's statistics also show clearly that many infections (Koch-Weeks, Diplo- 

 bacilli) present a definite clinical appearance in the great majority of cases ; and if 

 the relative numbers in his lists are compared with my own from Freiburg, we see 

 how the frequency of the different infections varies in different localities. 



C. Usher and H. Fraser l investigated a series of 820 cases (hi Aberdeen). 



In 310 cases (exclusively townsfolk) infected with the Koch-Weeks bacillus, 36 of 

 whom had the Diplobacillus also present, a probable diagnosis was given in 242 

 (86'4 per cent.) ; 235 of the cases were children under fourteen years old. 



In 274 cases with Diplobacilli (clinically probable in 176), and mostly country 

 folk, only about one-fifth were children ; 88 per cent, of the ' angular ' conjunctivitis 

 cases were due to Diplobacilli. 



In 24 pure pneurnococcal cases the symptoms varied. 



In 18 cases Gonococci were found. 



In 1 case diphtheria bacilli were found. 



In 114 doubtful cases (72 unilateral) 37 showed Staphylococcus pyogenes albus 

 and Streptococci. 



In Usher and Fraser' s series there was an increase in the frequency of conjunc- 

 tivitis among the town-people hi spring and autumn, the first chiefly due to an 

 increase in diplobacillary cases and the latter to the prevalence of Koch-Weeks 

 conjunctivitis. 



1 Loc. tit., reviewed Ophth. Rev., 1907. 



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