| comparison of the fibers of fowl adenovirus a serotype 1 isolates from chickens with gizzard erosions in europe and apathogenic reference strains. | a total of 18 samples from 4 outbreaks of gizzard erosions in broiler chickens in europe were used in the current study. fowl adenoviruses were found in samples from all 4 outbreaks, and isolates were identified as fowl adenovirus a (fadv-a) serotype 1. as described earlier, polymerase chain reaction-restriction fragment length polymorphism (pcr-rflp) analysis of the long fiber gene was conducted. however, all 18 samples showed the same pattern as apathogenic fadv-1 strains: ote and chicken embr ... | 2010 | 21088178 |
| pathogenicity and complete genome sequence of a fowl adenovirus serotype 8 isolate. | in this study we determined and analyzed the complete nucleotide sequence of the genome of a fowl adenovirus serotype 8 (fadv-8) isolate and examined its pathogenicity in chickens. the full genome of fadv-8 was 44,055 nucleotides in length with a similar organization to that of fadv-1 and fadv-9 genomes. no regions homologous to early regions e1, e3 and e4 of mastadenoviruses were recognized. along with fadv-9, fadv-8 has only one fiber gene and with regard to sequence composition and genome org ... | 2011 | 21237223 |
| application of cross-priming amplification (cpa) for detection of fowl adenovirus (fadv) strains. | fowl adenoviruses (fadvs) are widely distributed among chickens. detection of fadvs is mainly accomplished by virus isolation, serological assays, various polymerase chain reaction (pcr) assays, and loop-mediated isothermal amplification (lamp). to increase the diagnostic capacity of currently applied techniques, cross-priming amplification (cpa) for the detection of the fadv hexon gene was developed. the single cpa assay was optimised to detect all serotypes 1-8a-8b-11 representing the species ... | 2015 | 25655263 |
| gizzard erosion and ulceration syndrome in chickens and turkeys: a review of causal or predisposing factors. | gizzard erosion and ulceration syndrome (geu) was described for the first time in the 1930s. the main focus of early studies was on nutritional deficiencies and peroxidation of highly polyunsaturated fatty acids as causative factors. during the 1970s and 1980s the focus was moved towards toxic substances in the feed. scott's review in 1985 concluded that overproduction of gastric acid induced by gizzerosine was a major cause of geu. during the last decades, serotype 1 of fowl adenovirus a and cl ... | 2013 | 23859215 |
| whole genome sequencing of fowl aviadenovirus a - a causative agent of gizzard erosion and ulceration, in adult laying hens. | gizzard erosion and ulceration (geu) caused by fowl aviadenovirus serotype 1 (fadv-1) of the species fowl aviadenovirus a (fadv-a) represents an economically important problem in poultry production. the disease affects mostly young chicken broilers or layers before production. in this study, an unusual geu outbreak in a flock of laying hens at 38weeks of age is described. the affected flock showed elevated mortality rates, with the highest number of dead birds appearing between the 39th and 40th ... | 2017 | 27940213 |
| molecular characterization of quail bronchitis virus isolated from bobwhite quail in minnesota. | from 2008 to 2012, 4 separate cases of quail bronchitis virus infection were seen in bobwhite quail (colinus virginianus) raised in minnesota. the quail chicks ranged in age from 5 d to 8 wk and suffered from respiratory distress and elevated mortality. on necropsy, gross lesions consisted of mucus in trachea, congested lungs, caseous air sacculitis, accumulation of chalky white urates on internal organs, necrotic foci in liver, and enlarged spleen. histologic examination revealed fibrinoheterop ... | 2016 | 27418664 |
| phylogenetic and geographic analysis of fowl adenovirus field strains isolated from poultry in poland. | fowl adenoviruses (fadvs) are widely distributed in chickens in poland and throughout the world. fadv infections have been reported in the united states, australia, europe, and the mediterranean basin. detection of fadvs strains is very important from the epidemiological point of view and for monitoring disease outbreaks and developing strategies for vaccine development. several molecular epidemiology and phylogenetic studies have been performed, but the results obtained are still limited, becau ... | 2016 | 26446890 |
| adenoviral gizzard erosion in broiler chickens in germany. | avian adenovirus infections cause important disease complexes in chickens, but many of the viruses also infect chickens without resulting in overt disease. previously several outbreaks of gizzard erosions caused by a fowl adenovirus a serotype-1 (fadv-1) were reported from japan. here we report an outbreak of gizzard erosions in 12 broiler flocks in germany in 2011. chickens had a reduced daily weight gain and a higher total mortality rate of up to 8%. the birds showed a severe detachment of the ... | 2013 | 23678748 |