PERSISTENCE OF ANTIBIOTICS IN MILK 
After One Udder Infusion 
VEHICLE DOSE 
Water 200 mg. References: 57 
i 400 " AUREOMYCIN 
Ointment 200 
Water 
Water base 
Ointment 
Oilbase 400 ——— = ee | = TETRACYCLINE | 
Ointment 
Water 100 lt 
Hl 100,000 u. 
s 200,000 " 
: 250,000 " 
Oil bases 100 mg. 
200; 4 
250" 
DAYS Price NEDSION 
# ONLY TESTED FOR 72 HOURS 
U. S. DEPARTMENT OF AGRICULTURE AGRICULTURAL RESEARCH SERVICE 
BN- 10711-X 
Figure 4,--Udder infusion: The maximal time various antibiotics persisted in milk when different vehicles and doses were used 
(Streptomycin also refers to dihydrostreptomycin,) 
