Infectious outbreaks can last for more than a month at a population level, which explain that a new batch including mainly susceptible piglets can get infected if the animals are housed in a separate room but in the same compartment (airborne transmission).
ANSES - French Agency for Food, Environmental and Occupational Health & Safety. France
Nicolas Rose, DVM, PhD was born in Paris in 1971, he graduated at the Veterinary Faculty of Nantes (Oniris) in 1994. He then received a doctorate in Veterinary Science in 1995 at the University of Nantes after a training period at INRA research center in Tours. In year 2007 he graduated at the European College of Porcine Health and Management (ECPHM). He has been working as researcher in Epidemiology at the Anses-Ploufragan laboratory since 1995 and is currently the director of the Swine Epidemiology and Welfare research unit.
Dr. Rose has taken part in several research projects, at both national and European levels. He is especially skilled in epidemiology and mathematical modelling of infectious diseases with a particular interest in viral infections in swine populations. Of the many lines of research that he has participated in, the most important are the Porcine Reproductive and Respiratory Syndrome Virus (PRRSV), the Hepatitis E Virus (HEV), Swine Influenza viruses and diseases associated with Porcine Circovirus type 2 (PCV2). As a result of these investigations he is the co-author of more than 40 articles published in peer-reviewed international scientific journals, with numerous papers and communications on PCV2 and related diseases. He is also the author of the first study carried out on the risk factors associated with clinical PMWS.
Updated CV 30-Aug-2013
Reducing piglets mingling in farrowing and nursery facilities was found to delay the infectious process leading to a lower number of early infections. Clustering piglets by litter in small units after weaning also decreased significantly the probability of early infection.
It has been shown that the efficacy of PCV2 vaccines was dramatically decreased in the context of husbandry deviations such as excess of cross-fostering, mingling at weaning or very large groups in nursery.