Table 6.
Salmonella serotypes by calf-housing system, source, and farm for 44 environmental Salmonella isolates
| Serovar | No. of Salmonella from environment
|
% Salmonella by sample1 | % Salmonella by farm2 | |
|---|---|---|---|---|
| Pen floor3 | Nipple4 | |||
| IP5 (n = 25) | 25 | — | 41 (25/61) | 83 (5/6) |
| Cerro | 23 | — | 38 (23/61) | 66 (4/6) |
| Liverpool | 2 | — | 3 (2/61) | 16 (1/6) |
| GP6 (n = 19) | 15 | 4 | 31 (19/61) | 33 (2/6) |
| Cerro | 7 | 4 | 18 (11/61) | 33 (2/6) |
| Newport | 8 | 0 | 13 (8/61) | 16 (1/6) |
1
Percent of environmental samples culture positive for Salmonella.
2
Percent of farms with at least one environmental sample culture positive for the specified Salmonella serovar.
3
Salmonella isolates cultured from environmental samples of calf housing pen floors. A maximum of 1 isolate was cultured per sample.
4
Salmonella isolates cultured from environmental samples of nipples used for ad libitum feeding of GP calves.
5
IP = calves housed in individual pens without direct contact with neighboring calves and fed milk or milk replacer 2 to 3 times a day.
6
GP = calves housed in group pens with 3 to 25 calves being fed free-choice acidified milk.