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Table 1 Experimental animal group demographics and corresponding Staph. aureus Novel inoculums infused into challenge quarters

From: Staphylococcus aureus intramammary challenge in non-lactating mammary glands stimulated to rapidly grow and develop with estradiol and progesterone

Group Breed Mean last week milk SCC (cells/mL) Lactations completed Mean days in milk Mean last week milk yield (kg/day) Staph. aureus inoculum (CFU)
Group A Holstein (n = 6) 141 000 1 (n = 5) 568 25.7 4300
3 (n = 1)
Group B Holstein (n = 6); Jersey (n = 3) 126 000 1 (n = 7) 391 28.4 6400
2 (n = 1)
6 (n = 1)
Group C Holstein (n = 4) 251 000 1 (n = 2) 611 22.0 7500
2 (n = 1)
4 (n = 1)