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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.

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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