BACKGROUND Intestinal disease in nursery pigs is the most common cause of antibiotic usage in pigs in Denmark. The decision to initiate batch medication of intestinal diseases in nursery pigs is typically made by the stock personnel based on clinical assessments of pigs and counting of diarrhoeic faecal pools on the pen floor. The target population of this study was batches of nursery pigs (10-...

A cohort study was initiated in the spring of 2006 to investigate epidemiological aspects and pathogenesis of salmonid alphavirus (SAV) subtype 3 infections and pancreas disease (PD). The aims were to assess involvement of the freshwater production phase, the extent and frequency of subclinical infections and to follow PD-affected populations throughout the entire seawater production cycle, as ...

Salmonellosis is a common clinical and subclinical infection of pigs. The species adapted serovar S choleraesuis predominantly produces a septicemic disease in swine. Disease in other species, including humans, is rare compared to enteric type infections from non host adapted serovars such as S typhimurium. However, when host adapted serovars infect alternate species, disease can be severe. Vac...

We provide details of the models used in the main text, explain some of the results in greater detail, perform a sensitivity analysis for each model and explore a number of alternate scenarios to demonstrate the general nature of the results presented in the main text. S1 Details of the model The models used in this paper are extensions to the contact model described in detail in McCaw and McVe...

Three families in which cases of poliomyelitis had recently occurred were studied for the extent of subclinical infection and the presence of serum antibodies to both the mouse-adapted Lansing strain and the specific strain of poliomyelitis isolated from members of the family. Virus was recovered from the stools of all 5 cases and from 8 of 17 familial associates at the time of the first collec...

Infection with the human T-lymphotropic virus type III/lymphadenopathy-associated virus (HTLV-III/LAV) [now human immunodeficiency virus] can manifest as a spectrum of conditions ranging from severe immunodeficiency to asymptomatic infection. Because of the rapid growth of knowledge about this virus, there is a need for a system to classify patients with the various manifestations of infection....

Rotavirus is a major cause of infectious intestinal disease in young children; a substantial prevalence of asymptomatic infection has been reported across all age groups. In this study, the authors determined characteristics of asymptomatic rotavirus infection and potential risk factors for infection. Healthy persons were recruited at random from the general population of England during the Stu...

In 2008, 800 adults living within rural Kampong Cham Province, Cambodia were enrolled in a prospective cohort study of zoonotic influenza transmission. After enrollment, participants were contacted weekly for 24 months to identify acute influenza-like illnesses (ILI). Follow-up sera were collected at 12 and 24 months. A transmission substudy was also conducted among the family contacts of cohor...

Des infections Microbiennes de l'apparell urinaire se voient beaucoup en periode de gros­sesse.  Chez 25% des femmes enceintes, la bacteru­rie sans symptomes aboutit a une infection sym­ptomatique des voiles urinaires dans les mois ulterieurs de la grossesse, c'est pour cette raison qu'il est utile de demander, comme routine, des examens bacteriologiques d'urine, surtout pen­dant la grossesse....

BACKGROUND Studies indicate that asymptomatic infections do indeed occur frequently for both seasonal and pandemic influenza, accounting for about one-third of influenza infections. Studies carried out during the 2009 pH1N1 pandemic have found significant antibody response against seasonal H1N1 and H3N2 vaccine strains in schoolchildren receiving only pandemic H1N1 monovalent vaccine, yet repor...