Volume 20, Number 9—September 2014
Letter
Spread of Vaccinia Virus to Cattle Herds, Argentina, 2011
Table
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
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