Avian Pox

Riper, Charles van; Forrester, Donald J.

doi:10.1002/9780470344668.ch6

Cited by 94 publications

(107 citation statements)

References 103 publications

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“…Limitations of our study include 1) a lack of confirmatory histopathology of lesions and 2) direct tests of serologic results with captive birds experimentally infected and serologically positive status confirmed sensu van Riper et al (2002). Such tests are necessary, as birds can lose digits to other causes, and lesions similar to pox lesions could be caused by ectoparasites, bacterial infections, or other viruses (van Riper and Forrester 2007). Serology is also preferred because a lack of visible symptoms is not an accurate indicator of current or past exposure (Couvillion et al 1991).…”

Section: Discussionmentioning

confidence: 99%

“…Grassland birds are of conservation concern because their declines are largely associated with extensive habitat conversion and degradation (Knopf 1996;Mineau and Whiteside 2013). Little infectious disease research with grassland passerine birds has been conducted (see review by van Riper and Forrester 2007), yet the impacts of disease or immunosuppression from exposure to insecticides used in agriculture (Mason et al 2013) could be contributing factors in population declines. Diseases are of concern because they can be transmitted broadly, as North American grasslands form a nexus for species that co-occur on breeding grounds ranging from residents and short-distance migrants (gamebirds [Phasianidae] Martin and Gavin 1995).…”

Section: Introductionmentioning

confidence: 99%

“…Infection in birds occurs as a diptheritic disease affecting the mucosa, or as a cutaneous disease affecting unfeathered skin, with lesions that can result in the swelling and the loss of digits (van Riper and Forrester 2007) and can impair survival (Zylberberg et al 2012). Avipoxvirus species have been identified as major threats for endemic island birds and, along with malaria, have been implicated in the decline and extinction of several endemic bird species of the Hawaiian and Galapagos islands (van Riper et al 2002;Zylberberg et al 2012).…”

Section: Introductionmentioning

confidence: 99%

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RELATIVELY HIGH PREVALENCE OF POX-LIKE LESIONS IN HENSLOW'S SPARROW (AMMODRAMMUS HENSLOWII) AMONG NINE SPECIES OF MIGRATORY GRASSLAND PASSERINES IN WISCONSIN, USA

Ellison

Hofmeister

Ribic

et al. 2014

Journal of Wildlife Diseases

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ABSTRACT:Globally, Avipoxvirus species affect over 230 species of wild birds and can significantly impair survival. During banding of nine grassland songbird species (n5346 individuals) in southwestern Wisconsin, USA, we noted species with a 2-6% prevalence of poxlike lesions (possible evidence of current infection) and 4-10% missing digits (potential evidence of past infection). These prevalences approach those recorded among island endemic birds (4-9% and 9-20% for the Galapagos and Hawaii, respectively) for which Avipoxvirus species have been implicated as contributing to dramatic population declines. Henslow's Sparrow Ammodramus henslowii (n5165 individuals) had the highest prevalence of lesions (6.1%) and missing digits (9.7%). Among a subset of 26 Henslow's Sparrows from which blood samples were obtained, none had detectable antibody reactive to fowlpox virus antigen. However, four samples (18%) had antibody to canarypox virus antigen with test sample and negative control ratios (P/N values) ranging from 2.4 to 6.5 (median 4.3). Of four antibody-positive birds, two had lesions recorded (one was also missing a digit), one had digits missing, and one had no signs. Additionally, the birds with lesions or missing digits had higher P/N values than did the antibody-positive bird without missing digits or recorded lesions. This study represents an impetus for considering the impacts and dynamics of disease caused by Avipoxvirus among North American grassland bird species.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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RELATIVELY HIGH PREVALENCE OF POX-LIKE LESIONS IN HENSLOW'S SPARROW (AMMODRAMMUS HENSLOWII) AMONG NINE SPECIES OF MIGRATORY GRASSLAND PASSERINES IN WISCONSIN, USA

Ellison

Hofmeister

Ribic

et al. 2014

Journal of Wildlife Diseases

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“…No Brasil é descrita em passeriformes silvestres de criação doméstica, como Cyanoloxia brissonii (azulão), Sicalis flaveola (canário-da-terra-verdadeiro) (Van Riper & Forrester 2007) e em algumas espécies de aves de vida livre como Tyto alba (coruja de igreja) (Vargas et al 2011) e Dendrocygna autumnalis (marreca-cabocla) (Pereira et al 2014). Dados relativos à incidência e distribuição desta doença nas populações de aves silvestres ainda são escassos, especialmente na ordem Strigiformes que engloba as corujas (Vargas et al 2011).…”

Section: Introductionunclassified

Infecção por pox vírus e Aspergillus fumigatus em Bubo virginianus (Coruja jacurutu)

et al. 2016

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Resumo: Este trabalho descreve um caso de infecção mista por pox vírus e Aspergillus fumigatus em Bubo virginianus (coruja jacurutu). A ave, um macho adulto, foi encaminhada ao Núcleo de Reabilitação da Fauna Silvestre do Instituto de Biologia da Universidade Federal de Pelotas (NURFS/CETAS/UFPEL). Apresentava bom estado corporal, estava ativa, porém com incapacidade de voo. Após três dias apresentou lesões crostosas e de aspecto verrucoso na superfície dorsal das patas. Havia, também, nódulos de mesmo aspecto na pálpebra esquerda e na cera. A ave morreu após 15 dias de sua chegada ao NURFS e foi necropsiada no Laboratório Regional de Diagnóstico da Faculdade de Veterinária da Universidade Federal de Pelotas (LRD/UFPel). Histologicamente, as lesões verrucosas caracterizavam-se por hiperplasia do epitélio e nas células das camadas basal, espinhosa, granular e córnea havia corpúsculos de inclusão intracitoplasmáticos do tipo Bollinger. Na microscopia eletrônica foram visualizadas partículas virais características de pox vírus, incluindo Bubo virginianus como um hospedeiro do vírus. Havia, ainda, infiltrado inflamatório de células mononucleares e focos de colônias bacterianas na derme. Nos pulmões havia congestão e presença de granulomas com hifas fúngicas, que pela técnica de Grocott, apresentaram ramificação dicotômica compatível com Aspergillus spp., identificado na cultura como A. fumigatus. O diagnóstico de infecção por avipoxvirus pode contribuir para estudos relacionados com a ocorrência desta doença nas populações de vida livre e como informação auxiliar para o manejo e conservação desta espécie. Sugere-se, ainda, a inclusão do uso de raios-X nos protocolos de centros de reabilitação como o diagnostico de aspergilose em aves rapinantes com bom estado corporal, porém incapazes de voar.

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“…Avian pox virus has a world-wide distribution and occurs in a variety of species (Van Riper and Forrester 2007). The changes in the kidney were acute and relatively mild, suggesting renal dysfunction near the time of death.…”

mentioning

confidence: 99%

Polymelia and Syndactyly in a Swainson’s Hawk (Buteo swainsoni)

Rogers

Mete

McMillin

et al. 2016

Journal of Wildlife Diseases

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A hatch-year Swainson's Hawk (Buteo swainsoni) recovered from Modoc County, California, US, on 12 August 2012 had malformations of the rear limbs consisting of bilateral polymelia and syndactyly. We describe the malformations and evaluate potential causes. Postmortem examination revealed varus rotation of both femurs and abnormal appendages originating from the distal medial surface of the tibiotarsi with two nonfunctional digits on the right leg and one digit on the left leg. There was syndactyly between digits III and IV of both feet. Avian pox viral dermatitis was present on the skin of the ventral abdomen. A definitive cause of the skeletal malformations was not identified.

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Avian Pox

Cited by 94 publications

References 103 publications

RELATIVELY HIGH PREVALENCE OF POX-LIKE LESIONS IN HENSLOW'S SPARROW (AMMODRAMMUS HENSLOWII) AMONG NINE SPECIES OF MIGRATORY GRASSLAND PASSERINES IN WISCONSIN, USA

RELATIVELY HIGH PREVALENCE OF POX-LIKE LESIONS IN HENSLOW'S SPARROW (AMMODRAMMUS HENSLOWII) AMONG NINE SPECIES OF MIGRATORY GRASSLAND PASSERINES IN WISCONSIN, USA

Infecção por pox vírus e Aspergillus fumigatus em Bubo virginianus (Coruja jacurutu)

Polymelia and Syndactyly in a Swainson’s Hawk (Buteo swainsoni)

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