Table 1.

Strains of S. uberis isolated from individual quarters of dairy cows on four occasions over two lactations

HerdCowStrainsadetected in indicated sampleb from:
Left forequarterRight forequarterLeft hindquarterRight hindquarter
S1S2S3S4S1S2S3S4S1S2S3S4S1S2S3S4
11A1A2A2A1A3
2A4A4
3A5A6A7
4A8
5A9
6A10
21B1B1
2B2B2B2B2B3B3
3B4B5B5B4
4B6B6
5B7B8
6B9B10B9
7B11B12B12
31C1
2C2aC2bC2aC2b
3C2cC2cC2cC2cC2aC3
4C2bC2bC2b
5C2c
6C4C4C2aC2aC5C6C7aC6
7C8C8C9C9C10C10C11C2bC12C12C2dC2d
8C13C14aC14a
9C15C15C16C14bC14bC17C18C18
10C19C19C19C19C20
11C21C21
12C22C22C23C23
13C24C7bC25C25C26C26
41D1D1D1D2a
2D2aD2aD2aD2aD2bD2b
3D2aD2aD3D3
4D2bD2cD2c
5D2b
6D4D5aD6D4D2dD2b
7D7D8D5b
8D9
9D10D10D11D12D13
10D14D14D15D15
11D16D16
12D17
  • a —, S. uberis not isolated from sample; ∗, sample not collected.

  • b S1 to S4, samples 1 to 4. Collection dates (all in 1999) for herds 1 to 4 were, respectively, as follows: sample 1, 14 May, 17 May, 30 April, and 19 April; sample 2, 8 June, 14 July, 10 June, and 3 June; sample 3, 14 October, 8 October, 8 October, and 14 October; sample 4, 11 November, 10 November, 10 November, and 10 November.