68 
BULLETI^^ 51, U. S. DEPAETMEXT 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. coJi group. 
o 
&a2 
/oa 
/oo,o 
/oo.o 
S/*^^^ '^3^C?00 /?/AA^S:' 
"'SSCOA f£>S'' 
£rGGS^ M//77y y p^^ A?^/?T//i£j. ^ A7/jr£rn m^'tsv yv^/T£: 
ZW/f^Sf- '^''BLOCXO /?/A^<9Sl* 
S3GS Ai^75V >^L/r SL/GA¥T/.y ^n^/s-/?£^rr to .s^^fzz . 
wmassatammBBaBsm 
S-0(//? £-GGS. 
Bl.y^^/</?07:S. 
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, onlv 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. Xo 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. 
