Either sterile PSS or 50 μ g Escherichia coli endotoxin was inoculated into the fourth ( abdominal ) mammary gland via the teat duct 72 h after parturition .
孕鼠于产后72h分别用灭菌PSS和50μg大肠杆菌(escherichiacoli)内毒素经乳头管灌注到大鼠第四对乳腺内。