Poultry diseases and treatment
Dr. Mujeeb Ather Asst. Director (Pathologist)
Veterinary Biological Research Institute, Hyderabad .
NEW CASTLE DISEASE (RANIKHET DISEASE)
- A DREADED ENEMY OF POULTRY FLOCKS IT IS PREVALENT IN
INDIA SINCE1928.
- CHIKENS ARE HIGHLY SUSCEPTIBLE, IN GENERAL, YOUNGER THE
CHICKEN THE MORE SERIOUS IS THE DISEASE.
TRANSMISSION :
- INHALATION (AIR BRONE)
- INGESTION (CONTAMINATED FEED AND WATER)
- MOVEMENT OF LIVE BIRDS AND OTHER ANIMALS
- MOVEMENT OF PEOPLE AND EQUIPMENT
- CONTAMINATED VACCINES
- MOVEMENT OF POULTRY PRODUCTS.
SYMPTIOMS :
- INCUBATION PERIOD 2 TO 5 DAYS (AVERAGE 5-6 DAYS)
- VELOGENIC FROM
- MESOGENIC FROM
- LETOGENIC FROM
- ASMPTOMATIC FROM
VELOGENIC FROM :
- SUDDEN APPEARANCE WITH HEAVY MORTALITY
- INCREASES RESPIRATION AND WEAKNESS
- GREENISH DIARRHOEA
- REDUCED EGG PRODUCTION WITH WEAK & SHELL LESS EGGS.
- MUSULAR TREMORS AND TRORTICOLLIS
- PARALYSIS OF LEGS AND WINGS.
- OPISTHOTONOS
- PROSTRATION AND DEATH
MESOGENIC FORM :
- RESPIRATORY DISTRESS
- DROP IN EGG PRODUCTION WITH WEAK AND SHELL LESS EGGS.
- NERVOUS SYMPTOMS MAY OCCUR BUT ARE NOT COMMON.
- LOW MORTALITY
LENTOGENIC FROM :
- IN YOUNG CHICKEN – RESPIRATORY DISTRESS.
- USUALLY DO NOT CAUSE DISEASE IN ADULTS.
ASYMPTOMATIC FORM :
- NO CLINICAL SIGNS
- RECOGNIZED BY SEROLOGICAL TESTS.
GROSS LESIONS :
- HAEMORRHAGIC LESIONS ON THE PAPILLAE OF THE PROVENTRICULUS,
CAECA AND SMALL INTESTINES.
- CONGESTION OF TRACHEA
- PRESENCE OF EGG YOLK IN THE ABDOMINAL CACITY.
Haemorrhagic Ulcers in the intestine
DIAGNOSIS :
- SYMPTOMS AND LESIONS
- DETECTIONS OF ANTIBODIES
- VIRUS ISOLATION.
PREVENTION AND CONTROL :
- STRICT BLOSECCURITY : KOHRSOLIN – TH SPARY 3%
- VACCINATION
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