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Treatments and sample sizes. All birds received an inoculation with media alone (sham control) or a low (CA2009), low-medium (NC1995), or high (VA2013) virulence isolate of Mycoplasma gallisepticum.
| Sham Control | Low Virulence Isolate (CA2009) | Low-Medium Virulence Isolate (NC1995) | High Virulence Isolate (VA2013) | |
|---|---|---|---|---|
| Males | 4 | 6 | 4 | 6 |
| Females | 4 | 4 | 5 | 4 |
| Total | 8 | 10 | 9 | 10 |
