Table 3.
Day after birth | Day from weaning |
M. elsdenii fecal population in pig groupb |
|||||
---|---|---|---|---|---|---|---|
Inoculated with M. elsdenii |
Uninoculated (control) |
||||||
Range (5 pigs) | Avg (total no. of pigs) | SD | Range (4 pigs) | Avg (total no. of pigs) | SD | ||
10 | −10 | <LOD to 6.6 × 105 | 3 × 105 (3) | 3.3 × 105 | <LOD to 8.3 × 104 | 8 × 104 (1) | NA |
18 | −2 | <LOD to 1.4 × 106 | 7 × 105 (3) | 6.6 × 105 | <LOD | Und (4) | NA |
31 | 11 | 1 × 107 to 6 × 107 | 3.3 × 107 (5) | 2.3 × 107 | 8 × 106 to 1.6 × 107 | 107 (4) | 4.6 × 106 |
45 | 25 | 6 × 107 to 1.8 × 108 | 2.3 × 108 (5) | 1.6 × 108 | 2.4 × 107 to 1 × 108 | 6.5 × 107 (4) | 4.5 × 107 |
73 | 53 | 2.6 × 106 to 2 × 107 | 9.5 × 106 (5) | 7.3 × 106 | 2.6 × 106 to 1 × 108 | 3.1 × 107 (4) | 5.1 × 107 |
Of nine littermate pigs, five were inoculated with M. elsdenii antibiotic-sensitive strains and four control pigs were given sterile medium at various times after birth (Fig. 1). Pigs were weaned at 20 days of age.
CFU/g (wet weight) of feces, as determined by plating dilutions of fecal suspensions onto Me109M agar medium. SD, sample standard deviation for average fecal counts; Und, not detected; <LOD, beneath the limit of detection, defined in Table 1; NA, not applicable, insufficient sample.