Transporte aéreo a larga distáncia del virus SRRP, y del M. hyopneumonia

//04 Jun 2010
Researchers from the Swine Disease Eradication Center from the University of Minnesota in the US studied the long-distance airborne transport of infectious PRRSV and Mycoplasma hyopneumoniae from a swine population infected with multiple viral variants.
Airborne transport of porcine reproductive and respiratory syndrome virus (PRRSV) and Mycoplasma hyopneumoniae (M hyo) has been reported out to 4.7km. This study attempted to determine whether this event could occur over longer distances and across multiple viral variants. To accomplish this goal, a mixed infection of 3 PRRSV variants (1-8-4, 1-18-2 and 1-26-2) and M hyo 232 was established in a source population of growing pigs.
Over 21-day period, air samples were collected from the source population and at designated distances from the herd. Samples were tested for PRRSV RNA and M hyo DNA by PCR and if positive, further characterized. In exhaust air from the source population, PRRSV and M hyo were detected in 21 of 21 and 8 of 21 air samples, respectively.
Five of 114 (4.4%) long-distance air samples were positive for PRRSV and 6 of 114 (5.2%) were positive for M hyo. The 5 PRRSV-positive samples were collected at 2.3, 4.6, 6.6 and 9.1km from the herd. All contained infectious virus and were >99.2% homologous to PRRSV 1-8-4. No evidence of PRRSV 1-18-2 or 1-26-2 was detected in long-distance samples. All 6 M hyo-positive samples were 99.9% homologous to M hyo 232 and 3 samples (collected at 3.5, 6.8 and 9.2km from the herd) were infectious.
These results indicate that airborne transport of PRRSV 1-8-4 and M hyo 232 occurs over longer distances than previously reported and that both pathogens remained infectious.
This study was published in Vet Microbiol. 2010 Mar 31.

Tarjeta amarilla a los veterinarios daneses???

La administración danesa considera que los anrtibioticosz administrados a los animales para consumo humano son excesivos, por lo que quieren poner en práctica un programa para reducirlos.
Dicho sistema se aplicaria en breve, y consistiría en un sistema de tarjetas amarillas, que como en el futbol, tendrían una mision de aviso.
De esta manera, los veterinarios y ganaderos que recibiesen una tarjeta amarilla, tendrían una plazo de nueve meses para introducir medidas de correción en sus explotaciones. Si pasado ese plazo se observara que las medidas tomadas son inadecuadas, el gobierno obligaria a que en la explotación se pusiese en marcha un plan corrector del uso de antibioticos, tutelado por la propia administración.
El ministerio espera poder tener listo, en breve, un listado de los niveles inaceptables del uso de antibioticos, para las diferentes formas de producción.
Además, el Ministeria de Agricultura danés, cuenta ya con un listado de los veterinarios que más antibioticos prescribieron en el año 2009.