Poxvirus was the causative agent of two unusual outbreaks of proliferative glossitis in canary ( Serinus canaria forma domestica) breeders in the Northern Italy. A total of 45, 7-9-mo-old canaries were submitted in fair postmortem conditions to the Istituto Zooprofilattico Sperimentale delle Venezie at the beginning of November 2005 for diagnostic investigation. Birds belonged to two unrelated and geographically distant aviaries in northern Italy, herein identified as Aviary A and Aviary B. The two breeder flocks had both attended the same bird exposition held at the beginning of October and started experiencing an onset of high mortality 3 wk after the show. Twelve red factor-melanin canaries from Aviary A (Mantua) and 33 dominant white and recessive white canaries from Aviary B (Vicenza) were submitted for laboratory investigations. Clinical signs were unspecific and consisted of depression, ruffling of the feathers, epistaxis, and anorexia due to decreased feed and water intake. Postmortem findings revealed a severe increase in volume, thickening, and hardening of the tongue, which had turned pinkish to dark brown. No apparent gross lesions were noticed in integumentary, respiratory, and digestive systems or other internal organs. Histopathologic evaluation of the tongue revealed severe proliferation of the stratified squamous epithelium containing numerous large eosinophilic intracytoplasmic inclusion bodies (Bollinger bodies) displacing the nuclei of the cells peripherally. Severe ulceration of the surface epithelium, fibrinoheterophilic plaque formation, and moderate basal lymphoplasmacytic infiltrations were also associated with the proliferative lesion. Poxvirus was successfully isolated from the lesions in tissue cultures but not in specific-pathogen-free chicken embryonated eggs. Typical large, brick-shaped viral particles of 300-450 nm were also observed in affected tongues by transmission electron microscopy. This is the first report of multiple outbreaks of "poxvirus glossitis" in canaries.

Download full-text PDF

Source
http://dx.doi.org/10.1637/11713-071417-Case.1DOI Listing

Publication Analysis

Top Keywords

serinus canaria
8
proliferative glossitis
8
northern italy
8
canaries aviary
8
revealed severe
8
canaries
5
isolation avipoxvirus
4
avipoxvirus tongue
4
tongue canaries
4
canaries serinus
4

Similar Publications

Life cycle of Amblyomma calcaratum (Ixodida: Ixodidae) under laboratory conditions.

Parasitol Res

November 2024

Department of Preventive Veterinary Medicine and Animal Health, Faculty of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, SP, Brazil.

The life-cycle of Amblyomma calcaratum was evaluated experimentally under laboratory conditions using birds (Serinus canaria, Gallus gallus) and rodents (Calomys callosus) as hosts for immatures and a rabbit (Oryctolagus cuniculus) as host for adults. Developmental periods of the non-parasitic stages were observed in an incubator at 27 °C and 90% RH. The passerine S.

View Article and Find Full Text PDF
Article Synopsis
  • Acromelanism is a type of albinism seen in various vertebrates, where mutations in the TYR gene affect melanin production, leading to specific hair or feather color patterns.* -
  • This study focused on identifying the genetic cause of the acromelanistic "pearl" canary and determined that a mutation in the TYR gene likely results in this phenotype.* -
  • The findings suggest that similar acromelanistic traits in other bird species may also be linked to mutations in the TYR gene, similar to what is observed in mammals.*
View Article and Find Full Text PDF

Domestic strains of canaries (Serinus canaria) variably respond to photoperiod changes and apparently stay in breeding state for extended periods. Fife Fancy canaries are supposed to be similar to the native species living at 27-39° north where photoperiod significantly changes across the year. Our birds showed reproductive cycles when exposed to light regimes mimicking the annual cycle of photoperiod.

View Article and Find Full Text PDF

Androgen signaling in LMAN regulates song stereotypy in male canaries.

Horm Behav

September 2024

Department of Psychology, Neural and Cognitive Science Program, University of Maryland, College Park, MD 20742, USA.

During breeding when testosterone concentrations are high, male songbirds that are open-ended vocal learners like canaries (Serinus canaria) tend to produce a stable, stereotyped song that facilitates mate attraction or territory defense. Outside breeding contexts, song becomes more variable. The neuroendocrine mechanisms controlling this vocal variability across seasons are not entirely clear.

View Article and Find Full Text PDF
Article Synopsis
  • * The authors advocate for keeping ethnic and race-specific FRAX models in the US, suggesting they should be based on updated data related to fracture and death risks.
  • * The position opposing fixed bone mineral density thresholds is supported by the International Osteoporosis Foundation (IOF) and the European Society for Clinical and Economic Aspects of Osteoporosis, Osteoarthritis and Musculoskeletal Diseases (ESCEO), emphasizing the need for equity in fracture risk assessment.
View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!