Gizzard erosions in broiler chickens in Sweden caused by fowl adenovirus serotype 1 (FAdV-1): investigation of outbreaks, including whole-genome sequencing of an isolate.

The present paper describes the investigation of the first outbreaks of adenoviral gizzard erosions (AGE) in Sweden, in five broiler flocks. The investigation included whole viral genome sequencing and investigation of genomic organization and sequence relationships with other adenoviruses. All five flocks had a history of decreased growth and uneven size of birds since 9-10 days of age.

Retrospective analysis of post-mortem findings in domestic ducks and geese from non-commercial flocks in Sweden, 2011-2020.

Background: Small poultry flock ownership has become a popular hobby in Europe and North America in recent years but there is a general lack of information regarding bird health and welfare. This retrospective analysis of routine post-mortem cases of non-commercial anseriform poultry aimed at providing information on causes of mortality mostly in relation to mortality events. For this purpose, birds that were submitted for routine post-mortem diagnostics to the National Veterinary Institute (SVA) in Sweden in 2011-2020 were retrospectively reviewed to determine main causes of mortality.

Investigations into an Outbreak of Botulism Caused by Clostridium botulinum Type C/D in Laying Hens.

This case report describes a recent botulism outbreak in commercial laying hens with a history of increased mortality and flaccid paralysis. Routine diagnostic gross examination and microscopy from seven hens were inconclusive, but botulinum neurotoxin (BoNT) in peripheral blood was neutralized with both type C and type D antitoxins in the mouse bioassay. During a farm visit, 10 additional hens from a 34-wk-old flock on the farm were selected for clinical examination and further sampling.

Reproductive performance in pigs reared under organic conditions compared with conventionally reared pigs.

Background: To achieve a competitive reproductive performance in organic pig farming is a major challenge for this farming practise. Practices and research data regarding conventional pig production are not always applicable to organic production, why field studies are needed to identify differences in performance between organic and conventional pig farms in order to identify areas for improvement.

Results: Performance data for one year was collected from 5 organic herds that had more than 30 sows in production and used a computerized recording system, and data from five nearby conventional farms with more than 30 sows and the same recording system were used as a comparison.