Worming before exposure occurs will not prevent worms. Snouts Snouts are scored on a scale of 0-5. In this system, a score of 0 is a perfect nasal turbinate. Individual scores of 1 and 2 indicate subclinical infection or poor environmental conditions. An average score greater than 2 is consistent with clinical rhinitis and diagnostic tests should be performed and corrective action taken.
Some cases require vaccination or other intervention.
Most herds today have average scores of less than 1, do not vaccinate, and rely on good biosecurity for control. Lungs Lung scores are often the area of most concern, but also more difficult to interpret. Pneumonia levels can vary greatly, and the resulting effect on production is more difficult to assess, as are the treatment and control measures. This may vary from 1 percent to more than 50 percent. Groups of pigs with a prevalence of less than 30 percent and average lung scores of less than 2 percent have good pneumonia control.