The animals that were retained several times throughout the flow originated from sows with lower average parity. They had a much lower carcass weight (around 10kg) and a higher average score for lameness, pleurisy and enzootic pneumonia lesions.
What the experts say
PED virus has challenged biosecurity programs in North America, the standards of sanitation have risen to a new level to address PEDV. The article deals with the most relevant changes.
Exposure during acclimatization can be considered the first dose of a vaccine, and pre-farrowing exposure its booster.
It appears that the use of non-toxigenic C. difficile as a probiotic can reduce the severity of histologic lesions and the quantity of toxins detected in neonatal piglets.
The recent development of PCR serotyping is a step forward that allows any laboratory to determine the serotype of the isolated H. parasuis strain.
Presumed causes of ear necrosis are many and generally speculative; indeed, there are many risk factors associated with ear necrosis including trauma from pen mates or the environment, overcrowding, commingling, high humidity, limited feeder or water space, misformulated rations, mycotoxins, viral diseases, or bacteria.