11/03/2015 REOVIRUSINFECTIONSDiseasesofPoultryThePoultrySite

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BacterialDiseasesESCHERICHIACOLIINFECTIONSSALMONELLOSESPARATYPHOIDINFECTIONSFOWLCHOLERARIEMERELLAANATIPESTIFERINFECTIONSMYCOPLASMANECROTICENTERITISCHOLANGIOHEPATITISINBROILERCHICKENSGANGRENOUSDERMATITISBOTULISMAVIANTUBERCULOSIS

ViralDiseasesVIRALINCLUSIONBODYHEPATITISHAEMORRHAGICENTERITISOFTURKEYSEGGDROPSYNDROME1976ADENOVIRUSGROUPIASSOCIATEDINFECTIONSINFECTIOUSBURSALDISEASE(GUMBORO)INFECTIOUSBRONCHITIS(IB)LARYNGOTRACHEITISSWOLLENHEADSYNDROMEINFECTIOUSENCEPHALOMYELITISNEWCASTLEDISEASEFOWLPOXREOVIRUSINFECTIONS

NeoplasticDiseasesinPoultryVIRUSINDUCEDNEOPLASTICDISEASESMAREK'SDISEASELYMPHOIDLEUKOSISMYELOCYTOMATOSISERYTHROBLASTOSISADENOCARCINOMATOSIS

ParasiticDiseasesCOCCIDIOSISHISTOMONOSISASCARIDIOSISRAILLIETINOSISKNEMIDOKOPTOSIS

MycosesandMycotoxicosesASPERGILLOSISASPERGILLUSGRANULOMATOUSDERMATITISAFLATOXICOSISCANDIDIASISFUSARIOTOXICOSES

DeficiencyDiseasesVITAMINB2DEFICIENCYVITAMINBiDEFICIENCYVITAMINEDEFICIENCYFATTYLIVERHAEMORRHAGICSYNDROMESLIPPEDTENDON(PEROSIS)

OtherPULMONARYHYPERTENSION(ASCITIS)SYNDROMEINBROILERCHICKENSAMYLOIDOSISDEEPPECTORALMYOPATHYRUPTUREOFTHEGASTROCNEMIUSTENDONINBROILERBREEDERSCAGELAYERFATIGUEDYSCHONDROPLASIATHYPERKERATOSIS

REOVIRUSINFECTIONS

271.Viral arthritis/tenosynovitis. The most frequent reovirusassociated disease inpoultryisviralarthritis.Clinicallyitismanifestedbylamenessandswellingsaffectingprimarily tarsometatarsal joints and the feet. Many infected birds are in a goodgeneralcondition,butsomecouldbe lethargicandexhausted.Themortality isverylow.Theinfectionsaffectpredominantlymeattypepoultry.

272.Insomecases,jointcavitiesortendonsheathscontainasmallamountofstrawyellowexudatewhereasinothertheexudateishaemorrhagicorfibrinous.

273..Fibrinoustenosynovitis.Theinflammationofthetendonprogressestoachronictype lesion characterized by tissue fibrosis in the affected area. The aetiologicalagent is a reovirus,memberof theOrthoreovirusgenus,Reoviridae family.Severalserotypesare identified. For their identification, the agar gel precipitation test could

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DiseasesofPoultryByIvanDinev,DVM,PhD

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11/03/2015 REOVIRUSINFECTIONSDiseasesofPoultryThePoultrySite

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GOUTHYPERANDROGENISMINBROILERCHICKENSEFFECTOFSTICKYWILLY(GALIUMAPARINE)SEEDSONHEALTHYSTATUSANDPRODUCTIONTRAITSINBROILERCHICKENSGIZZARDIMPACTIONINTURKEYPOULTSROUNDHEARTINTURKEYS(DILATEDCARDIOMYOPATHY)ACUTESELENIUMINTOXICATIONACUTEPROPANEBUTANEINTOXICATIONSPONTANEOUSRUPTUREOFTHECAUDIALRENALARTERYINTURKEYSSUBCUTANEOUSEMPHYSEMAGASTROINTESTINALIMPACTIONMALFORMATIONS

be used. Reoviruses are highly resistant to a number of environmental factors(temperature,pHetc.).

274..Stuntingsyndrome inbroilers.Thestuntingsyndrome inbroilers isassociatedwith a reovirus infection but according to some studies, the role of the reovirus isprobably secondary. It is characterized by a considerably reduced live weight inaffectedbirdsandavariousdegreeofununiformityintheflockvaryingfrom510%to4050%,usuallyseenaftertheageof14days.

275.Thegrowingprimarywingfeathersareabnormallybigforchickenswithretardedgrowth, they protrude at various angles, so the disease is termed ..helicopterdisease".Onedayoldchickensarethemostsusceptibletotheinfection.

276.Usually,ahighdegreeatrophyofthepancreasisobserved.Reovirusesareshedwith faecesandcouldcontaminate theeggshells.Thetransmissionof the infectiontosusceptiblechickensisrealizedhorizontally.Theverticalrouteof transmission isalsoproved.Reovirusescouldpersistininfectedbirdsformorethan40weeks.

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11/03/2015 REOVIRUSINFECTIONSDiseasesofPoultryThePoultrySite

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277.278.The small intestine is pale, dilated and contain indigested forage. Thetentative diagnosis of viral arthritis and stunting syndrome could be made on thebasis of symptoms and lesions. The detection of reovirus antibodies via ELISAsupports the diagnosis. Viral arthritis should be differentiated from M. synov/aeinduced, staphylococcal arthrites and the spontaneous rupture of the tendon of thegastrocnemius muscle. The vaccination of broiler breeder flocks with live orinactivatedvaccinesprotectsonedayoldchicks. Infectedbirdsshouldbe removedfrom thepremises.The iodinedisinfectantsareconsideredeffective for inactivationofagents.

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