Volume 20, Number 9—September 2014
Letter
Spread of Vaccinia Virus to Cattle Herds, Argentina, 2011
Table
Diagnosis of Orthopoxvirus infection in beef and dairy cattle during a study of the spread of vaccinia virus to cattle herds, Argentina, 2011*
Province | Cattle type | No. farms sampled | No. serum samples tested | No. positive samples, by level of NU/mL against orthopoxvirus† |
No. (%) positive by real-time PCR |
||||||
---|---|---|---|---|---|---|---|---|---|---|---|
100 | 200 | 400 | 800 | Total (%) | vgf | HA | |||||
Córdoba | Dairy | 1 | 25 | 0 | 0 | 1 | 0 | 1 (4.0) | 2 (8.0) | 0 | |
Santa Fe | Dairy | 1 | 25 | 3 | 0 | 0 | 0 | 3 (12.0) | 0 | 0 | |
Corrientes | Beef | >2‡ | 8 | 0 | 1 | 1 | 0 | 2 (25.0) | 1 (12,5)§ | 1 (12,5)§ | |
Entre Ríos | Beef | 5 | 42 | 2 | 2 | 1 | 1 | 6 (14.3) | 2 (4,8) | 1 (2,4)§ | |
Total | Dairy and beef | >9 | 100 | 5 | 3 | 3 | 1 | 12 (12.0) | 5 (5.0) | 2 (2.0) |
*HA, hemagglutinin gene DNA; NU, serum dilution at which 70% plaque reduction per mL occurs; vgf, orthopoxvirus vaccinia growth factor gene DNA.
†Determined by plaque-reduction neutralization test.
‡Samples were obtained from several farms in Corrientes Province.
§Animal was also positive by plaque-reduction neutralization test.
Page created: August 18, 2014
Page updated: August 18, 2014
Page reviewed: August 18, 2014
The conclusions, findings, and opinions expressed by authors contributing to this journal do not necessarily reflect the official position of the U.S. Department of Health and Human Services, the Public Health Service, the Centers for Disease Control and Prevention, or the authors' affiliated institutions. Use of trade names is for identification only and does not imply endorsement by any of the groups named above.