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2.3 Avian diseases
      2.3.1 Epidemiological characteristics
State of Occurrence Suspected Diseases
Infection rate
1. hign morbidity, high mortality
2. high morbidity, low mortality
 
 
3. low morbidity, low mortality
1. ND (73), GPV (68), FC (77)
2. IBD (70), IB (69), Sal. (81), Coli. (75),
    CIA (63), IC (78), AMY (76), MD (72),
    AM (83)
3. Leuco. (85)
Type of outbreak
1. rapid transmission
2. comparatively slow transmission
3. sudden outbreak
4. persistent outbreak
 
5. sporadic outbreak
6. latent infection
7. flock base outbreak
8. from the hatchery
9. mixed infection
10. transovarial infection
 
1. ND (73), IB (69), DVH (65), GPV (68)
2. MD (72), FP (67), ILT (71)
3. IBD (70), Anati. (74), NE (79)
4. AM (83), Leuco. (85), Coli. (75),
    IC, AMY (76)
5. FP (67), EDS (66), NE (79)
6. Sal. in breeding hen (81)
7. Coli. (75), Myco. (74), IC (78)
8. Sal. (81), Anati. (74), GPV (68)
9. IBD (70), AMY (76)
10. GPV (68), DHV (65), Sal. (81)
      CIA (63), NE
Age of outbreak
1. 1-6 weeks
2. less than 4 weeks
3. over 4 weeks
4. less than 6 weeks
5. 3-6 weeks
6. 4-8 weeks
7. over 6 weeks
1. Anati. (74)
2. GPV (68)
3. AM (83)
4. DVH (65)
5. IBD (70)
6. AMY (76)
7. MD (72)
Season of outbreak
1. cool
2. rainy
1. GPV (68), ILT (71)
2. AM (83), Leuco. (85)
Factors
1. contaminated in feeds and
    water
2. pathogenic contaminated in
    pens
3. stress
1. Sal. (81), Asp. (80), Nematode
    Coli. (75)
2. MD (72), IBD (70), Sal. (81),
    Coc. (84), Coli. (75)
3. AMY (76), IB (69), Coli.(75)
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