Spread of an Experimental Derby Infection in Antibiotic-Treated or Vaccinated Piglets.

infections are a common reason for antibiotic treatment in pig production. Experimental studies in animals naturally infected with comparing the course of an experimental infection in piglets previously treated with tylosin or vaccinated against are scarce. A total of 72 seven-week-old -free pigs were taken from a herd with a history in piglet rearing.

Nutrient digestibility, organ morphometry and performance in vaccinated or non-vaccinated Lawsonia intracellularis infected piglets.

Background: Lawsonia intracellularis is one of the world's most important infectious diseases in pork production with regard to economic losses. So far, studies are missing that describe the effects of a natural infection of piglets on the digestibility of nutrients, possible effects on performance and the morphometrics of the intestine depending on whether piglets are vaccinated, clinically healthy or clinically affected with regard to Lawsonia intracellularis induced diarrhoea.

Results: Digestibility studies were performed on a total of 27 eight-week-old piglets with naturally occurring Lawsonia intracellularis infection in a trial with three repetitions.

Experimental studies on effects of diet on Lawsonia intracellularis infections in fattening boars in a natural infection model.

Background: Lawsonia intracellularis is one of the most economically important pathogens in swine production. This study tested the hypothesis that the composition of diets for pigs has an impact on the excretion of L. intracellularis in a natural infection model.