Hemorrhagic Hepatopathy in Broiler Breeder Pullets: Gross and Microscopic Pathology and Factors Associated with Incidence

Tracy, Linnea M.; Shepherd, Eric; França, Monique; Williams, Susan M.; Grogan, Karen; Nicholds, Jenny; Shamoun, Katharine; Lee, ChangHee

doi:10.1637/aviandiseases-d-20-00138

Cited by 1 publication

(3 citation statements)

References 33 publications

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“…As observed in the chickens of the present study, flocks affected by amyloidosis had often increased mortality (Murakami et al 2013b, Carnaccini et al 2016, Tracy et al 2021, due to the severity of liver lesions (Ibi et al 2015). The three cases in backyard chickens had also chronic inflammatory changes, which may be related to amyloidosis, since chronic diseases also promote hyperstimulation of the immune system (Landman et al 1998).…”

Section: Discussionsupporting

confidence: 60%

“…The association with vaccination may be justified by the identification of amyloid deposits in the pectoral muscles (site of vaccine application). Recently, outbreaks of amyloidosis have been reported in laying hens (Murakami et al 2013b, Ibi et al 2015, Carnaccini et al 2016 and in broiler breeders (Tracy et al 2021) and related to the administration of commercial or autogenous vaccines against salmonellosis (Murakami et al 2013a, Tracy et al 2021. In a previous study, amyloidosis that investigated concerning the potential association with administration of adjuvanted vaccines and found that a single company provided commercial vaccines that were used in different farms, which had chickens with amyloidosis (Tracy et al 2021).…”

Section: Discussionmentioning

confidence: 99%

“…Recently, outbreaks of amyloidosis have been reported in laying hens (Murakami et al 2013b, Ibi et al 2015, Carnaccini et al 2016 and in broiler breeders (Tracy et al 2021) and related to the administration of commercial or autogenous vaccines against salmonellosis (Murakami et al 2013a, Tracy et al 2021. In a previous study, amyloidosis that investigated concerning the potential association with administration of adjuvanted vaccines and found that a single company provided commercial vaccines that were used in different farms, which had chickens with amyloidosis (Tracy et al 2021). Amyloid deposition may have been induced indirectly by persistent inflammatory stimulation at the vaccination site and/or by absorption of the antigens into the circulation (Carnaccini et al 2016).…”

Section: Discussionmentioning

confidence: 99%

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Hepatic changes in Gallus gallus domesticus in Brazil

et al. 2022

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The occurrence and the frequency of hepatic changes in chickens, including broiler (BC), layer (LC) and backyard chickens (BYC) were investigated. The retrospective and prospective study (2006-2021) was conducted with a total of 300 cases of liver disorders. Industrial poultry (BC and LC) were frequently affected (88%) and noninfectious changes were the most diagnosed (69%). Considering etiology or conditions, the hepatic changes were classified as follows: degenerative changes (42%), bacterial (28%), metabolic (15%), toxic (8%), viral (3%), neoplastic (2%), protozoal diseases (1.5%) and circulatory disorders (0.5%). Regarding the type of bird, degenerative, toxic changes and viral hepatitis were more frequent in BC. Circulatory and metabolic disorders, as well as bacterial hepatitis, were more frequently diagnosed in LC. Neoplastic and protozoal hepatitis occurred more frequently in BYC. The macroscopic examination in association with histopathology enabled the diagnosis of the hepatic changes in 59% of the cases. Considering bacterial hepatitis in commercial poultry, the etiological diagnosis is highly important, in view of the risk for public health, despite the obvious importance due to the productivity losses and condemnation at processing.

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