68 



BULLETIN 51, U. S. DEPARTMENT OF AGRICULTURE. 



BACTERIOLOGICAL AND CHEMICAL RESULTS OF COMPOSITE SAMPLES 

 OF EGG OPENED COMMERCIALLY IN THE PACKING HOUSE. 



The laboratory results of composite samples of eggs opened com- 

 mercially in the packing house are summarized in Tables 29 and 30 

 and are shown graphically in figures 1 and 2. From these data the 

 following conclusions are drawn : 



(1) The samples of July and August firsts contained very few 

 organisms, and in many cases no bacteria of the B. coli group. - 



'O 



o 



/e.e 



> 2ao 



SI 66.e 

 &3.2 

 /oa 

 /oo.o 

 /oo.o 



/OOXi 



S/'W^L "3Z.C?0£) ^/AASS." 

 "'S£^COA f£>S'.' 



£^GGS i'V/T/T' x ozjr j^/?TA''!uu.y />^/jc^o i/iyy^ At^/y/T^r. 



/^/?<mE- '^'^i.OO-O yP/A/iSiSy 



£^SGS tv/T/^ yv /./r yS/./GH 7-z.y ^in/ z^/^A/y- to s/y£Z.L » 

 i/w/y/T£- /i'c>7:s. 



SGGS W/T/^ G /r>SSA/ y^/.SOA7£AZ. 

 •SOUff £-GGS . 



w 



Fig. 1. — Percentage of samples opened commercially with bacterial counts over 1,000,000 



per gram. 



(2) The majority of the samples of clean-shelled seconds had a 

 comparatively low bacterial content, only 8.3 per cent of them con- 

 taining over 1,000,000 organisms per gram. The number of B. coli 

 varied in the different specimens from none to 100,000 per gram. 



(3) The percentage of bacterial counts over 1,000,000 per gram in 

 samples of dirties, checks, and eggs with yolk partially mixed with 

 albumen was 16.6, 18.8, and 20 per cent, respectively. No greater 

 number of B. coli was found in these samples than in samples of 

 seconds. 



(4) The samples of blood rings contained comparatively few 

 organisms. The large blood rings in most instances showed more 

 infection than did the small rings. Most of the specimens contained 

 less than 10 B. coli per gram. 



