Sammanfattning

Alterations in the various leukocyte populations in milk, blood, and mammary lymph were studied by use of the flow cytometric method during acute mastitis episodes induced by endotoxin infusion (50 micrograms of lipopolysaccharide of Salmonella typhimurium SH 4809) via the teat canal. Lymph samples were collected via a semipermanent catheter from an afferent duct to the supramammary lymph node. Milk somatic cell count increased at 4 hours after infusion of endotoxin. Neutrophils were the predominant cell population for up to 59 hours after infusion. Numbers of lymphocytes and monocytes-macrophages in milk also increased after the endotoxin infusion. The total cell count in milk started to decrease during the third postinfusion day and returned to preinfusion values during the fourth day. Lymphocyte numbers remained high for about 1 week after the infusion, and lymphocytes were the predominant cell population between postinfusion days 4 and 8. Total blood leukocyte count decreased during the first 6 hours after infusion, followed by an increase until postinfusion hour 31. The proportion of neutrophils in blood increased during the first day, whereas that of lymphocytes decreased. Lymph flow rate and leukocyte numbers in lymph increased after endotoxin infusion. The proportion of neutrophils in the lymph increased during the first 6 hours, whereas that of lymphocytes decreased. After postinfusion hour 6, the inverse course of events was seen.

Publicerad i

American Journal of Veterinary Research
1990, Volym: 51, nummer: 10, sidor: 1603-1607

SLU författare

• Saad, Ala'a Medhi

  • Institutionen för obstetrik och gynekologi, Sveriges lantbruksuniversitet
    

• Östensson, Karin

  • Institutionen för obstetrik och gynekologi, Sveriges lantbruksuniversitet
    

UKÄ forskningsämne

Klinisk vetenskap


Publikationens identifierare

DOI: https://doi.org/10.2460/ajvr.1990.51.10.1603

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/88234