Define
Its defined as a Newcastle disease infection where mortality not exceed 2% by caused by either virulent & non virulent. this the primary signs of Newcastle disease infection.
Importance
To early diagnosis of Ndv infection in flock
To prevent further infection to others birds
To indicate Titre levels at vaccinated birds
Minimize managerial & operations costs
Reduced treatment costs
Clinical Signs
Dyspnoea: Respiration difficulty by tracheal & airsac inflammation
S
Severe prostration: Birds getting down & prostration due to hypertharmic state when disturbances of thermoregulatory center at hypothalamus.
Faeces: Not turn fully greenish colour due to birds still intake feed to develop defense mechanism against ND
faeces from partially anorexic in primary stagews of NDV infection
greenish faeces with urate are common at primary stages in NDV infection
Head Region :Some birds show nasal discharge with oedematous head along with swallon infraorbital sinuses
Huddling at near heat source
Egg colors :Dual color combined with half part whites & half part brown color at brown color laying hen.
Postmortem Findings
Proventriculur musles are swallon & thickned upto 5 times then normal. glands are starting dilated & later hemorrhagic.
this is the pathognomic leison of primary ND infection in poultry.
See Also
Newcastle Disease: Strain, Etiology, Clinical Sign,Postmortem Findings & Treatment
Low pathogenic Avian Influenza(LPAI) in Poultry
Postmortem Findings Of Low Pathogenic Avian Influenza (LPAI) In Poultry
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