A symptom indicating respiratory, digestive, nervous system, and in various organs showing a high contagion and mortality viral disease. Depending on the strength that causes the disease separated by Apathogenic, Lentogenic, Mesogenic, Velogenic. This has caused increasing every year and it gives a lot of damage to poultry farms and all poultry farmers should dedicated to the vaccine, such as preventive maintenance.
1. Agent
Paramyxovirus of Paramyixoviridae and got a blood agglutination in the serum test and use HI.
2. Epidemiology
And the world occur in some countries, the propagation path is subclinical infections based or move the carrier chicken holds the virus and move, sell from contaminated hatchery then spread through chicks stocking, infected wild birds have direct contact with chickens, vehicle, poultry equipment, eggs, feed, chicken meat, human, animal, insect, and manure.
3. Clinical Signs
① Chicken
Lentogenic virus almost do not appear clinical symptoms or show mild respiratory symptoms, Mesogenic virus induces mild gloomy, anorexia, egg production decreased, egg quality degradation. Velogenic virus lead to a significant dyspnea, causing the blue diarrhea, conjunctivitis, paralysis then morbidity and mortality are 100%.
 
② Chick
Lentogenic virus show coughing, sneezing, breathing sound golgol and Mesogenic virus causes star gazing, paralysis, convulsions. Velogenic virus is similar to Mesogenic virus but acute elapsed.
4. Prevention and Treatment
1) Prevention
① The thorough vaccination.
② clean the cage, poultry instrument and disinfect tools and control outsiders.
③ breeds isolation by keeping a certain distance between chicken and chicks.
④ Install disinfectant part in poultry and poultry inlet and replace the two or more times a week.
⑤ refrain movement of infected chickens and reported to the authorities and processed in accordance with the instructions.