Volume 17, Number 3—March 2011
Research
Elephant-to-Human Transmission of Tuberculosis, 2009
Rendi Murphree
, Jon V. Warkentin, John R. Dunn, William Schaffner, and Timothy F. Jones
, Jon V. Warkentin, John R. Dunn, William Schaffner, and Timothy F. Jones
Table 2
Exact relative risk for potential risk factors for latent Mycobacterium tuberculosis infection among 13 employees who worked in the quarantine area of an elephant refuge, Tennessee, USA, 2009*
| Potential risk factor | TST conversion/ risk factor, no. (%) | TST conversion/ no risk factor, no. (%) | Relative risk (95% CI)† |
|---|---|---|---|
| Close contact with elephant(s) | 1/3 (33) | 7/10 (70) | 0.48 (0.09–2.48) |
| Participated in elephant trunk washes | 0/1 (0) | 8/12 (67) | NC |
| Pressure washed barn walls and floors | 5/8 (63) | 3/5 (60) | 1.04 (0.43–2.55) |
| N95 respirator fit tested annually | 2/5 (40) | 6/8 (75) | 0.53 (0.17–1.68) |
| “Always” compliant with N95 wear | 2/5 (40) | 6/8 (75) | 0.53 (0.17–1.68) |
*TST, tuberculin skin test; CI, confidence interval; NC, not computed.
†Relative risk and confidence intervals were not computed when at least 1 cell contained zero.
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