Table 4.

Source and location of E. coli O157:H7 during two outbreaks on farm R

Sample sourceSampling location and resultsa
11/8/95b11/14/9511/16/9511/20/9511/24/9511/29/9512/4/9512/13/9512/20/951/3/961/10/961/16/961/22/961/30/962/6/962/13/962/20/962/27/963/5/96 through 7/1/96c7/8/967/15/967/23/967/30/968/5/96
FeedSHSHSHSHBBBPIPIIPII
WaterSHSHSH-3,1SH-3SHSH-3SHSHSHSHSHSHSHSHSH
BBBBBBBBB-3B-3
PI/II-7PI/IIPI/IIPI/IIPI/II
Cohort animal (DOBd)
 Red 116 (12/31/95)HHHHHHHHSHPIPIPIPIPI
 Red 115 (12/23/95)HHHHHSHSHSHSHPIPIPIPIPII
 Red 114 (12/24/95)HHHHHSHSHSHSHPI-7,8PIPIPIPII
 Red 113 (11/23/95)HHHHHHSHSHSHSHSHBBBPIPII-7PIIPIIPII-7
 Red 112 (11/16/95)HHHHHHHSHSHSHSHSHBBBPI-7PIPIPIPII
 Red 111 (10/29/95)HHHHHSHSH-3SH-3,5BBBBBBBBPIPIPIPI-7PII
 Red 110 (10/06/95)HHHHSHSHSH-3SH-3BBBBBBBBPIPIIPII-7PIIPII
 Red 109 (10/06/95)HHHHSHSHSH-3SHBBBBBBBBPIPIIPIIPIIPII
 Red 108 (10/04/95)HHSHSHSHSH-3SH-3B-3,5BBBBBBBBPIIPIIPIIPIIPII
 Red 107 (10/04/95)HHSHSHSHSHSHBB-3,5BB-3B-3,6B-3BB-3B-3PII-7PIIPIIPIIPII
 Red 106 (9/30/95)HHSHSHSHSH-3SHBBBBBBPIPIBPII-7PIIPIIPII-7PII
 Red 105 (9/29/95)HSHSHSHSH-3SHSHB-3BBB-3B-3BBBBPIIPIIPIIPIIPII
 Red 104 (9/24/95)HSHSHSH-1SHSHSHBBBBBBPIBBPII-7PIIPIIPIIPII
 Red 103 (9/16/95)SHSHSHSHBBB-3BBBBB-3BB-3BBPIIPIIPIIPIIPII
 Red 102 (9/15/95)SHSHSH-1SH-1SHSHSHSHBBBBBBPIPIPIPIIPIIPII-7PII-7PII
 Red 101 (9/14/95)SH-1SHSHSHSHSH-4B-4BBB-3BBBPIPIPIPII-7PIIPIIPIIPII
  • a H, individual calf hutch; SH, superhutch containing weaned heifers; B, calf barn; PI, pen I; PII, pen II; PI/II, water tank shared by animals in pens I and II. Data in boldface type indicate that this sample tested positive for E. coli O157:H7. The number(s) following the sampling location designation refers to the REDP of the isolate.

  • b Sampling date (month/day/year).

  • c All samples collected during this period were negative.

  • d Date of birth (month/day/year).