Mastitis in a flock of milking sheep

J. H. Kirk, J. S. Glenn, John Maas

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Milk samples were aseptically collected from 62 ewes at lambing from a flock of about 400 machine-milked Dorset and Polypay sheep. Of these, 24 ewes were sampled again at weaning upon entry into the milking group. An additional 18 ewes with clinical mastitis were sampled during lactation. Somatic cell counting was done on the milk from 59 ewes in the milking group. At lambing, milk from 29% of the ewes tested was culture-positive. Unilateral infections predominated. Coagulase-negative staphylococci (CNS) were found in 88% of the samples. Of the ewes sampled at both lambing and weaning, 33% were free of intramammary infections (IMI), 38% developed IMI during this period, 21% had spontaneous cures, and 8% had CNS IMI at lambing but were infected with coagulase-positive staphylococci (CPS) at weaning. Of the milking ewes with clinical mastitis, CPS were isolated in 66% of the milk samples while 22% had no growth. Nearly 90% of the milk samples had somatic cell counts of under 200 000 cells ml-1. The reason for the high incidence of CPS clinical mastitis in the milking group was not determined. Somatic cell counts in this milking flock of sheep were similar in magnitude to those found in non-mastitic dairy cows but lower than those for milking goats. This suggests that somatic cell count standards for cow milk could probably be applied to sheep milk. The somatic cell counts indicated a low level of IMI in this milking flock, reflective of the preventive mastitis measures used.

Original languageEnglish (US)
Pages (from-to)187-191
Number of pages5
JournalSmall Ruminant Research
Volume22
Issue number2
DOIs
StatePublished - Sep 1 1996

Fingerprint

Mastitis
milking
mastitis
ewes
Sheep
flocks
Milk
Coagulase
Staphylococcus
sheep
lambing
somatic cell count
coagulase positive staphylococci
milk
Cell Count
Weaning
Infection
weaning
infection
coagulase negative staphylococci

Keywords

  • Etiology
  • Mastitis
  • Sheep
  • Somatic cell counts

ASJC Scopus subject areas

  • Animal Science and Zoology
  • veterinary(all)

Cite this

Mastitis in a flock of milking sheep. / Kirk, J. H.; Glenn, J. S.; Maas, John.

In: Small Ruminant Research, Vol. 22, No. 2, 01.09.1996, p. 187-191.

Research output: Contribution to journalArticle

Kirk, J. H. ; Glenn, J. S. ; Maas, John. / Mastitis in a flock of milking sheep. In: Small Ruminant Research. 1996 ; Vol. 22, No. 2. pp. 187-191.
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