Introduction Lecture Flashcards
(22 cards)
Gallifprms vs Anseriforms
Galliforms: chicken, turkey, quail, partridge, guinea fowl, peafowl, pheasant
Anseriforms: goose and duck
Importance of poultry pathology
- prevention instead of reaction to disease
- necropsy is the main procedure for diagnostics and sampling
Specialities in avian digestive tract
Specialities in avian respiratory system
Specialities in avian skeleton
Specialities in avian urogenital system
- large kidneys, 3 divisions
- portal circulation
- no bladder
- testes in the body cavity
- Anseriforms have phallus
- in layers only your left side organs develop
Specialities in avian immune system
Specialities in avian physiology
Anatomy of t
Normal weight of chicken egg
Around 60g (50-70g)
Development of the egg
Quality of the egg shell. Possible reasons of low quality
- heat
- stress
- infectious diseases (IB, NDV, EDS, AMPV)
- vitamins deficiency
- minerals deficiency
- micotoxins
Faulty eggs are usually layer in the morning
Embryonic development of the chicken. Stages
- Embryonic stage (8-9 days)
- Fetal growth (10-21 days)
Embryonic stage of the chicken development
- qualitative development
- 2-4 days are critical
Fetal growth stage of the embryonal development of the chicken
- quantitative development
- 12-13 days the position is fixed
- 19-21 days are critical (chick should hatch)
Disturbances in embryonic development of the chicken
Egg mould
Necropsy of a bird embryo
The right position of a bird embryo
- head under the right wing, close to the air cell
- legs pulled up in the other end
- toes pushed to the shell
- right position is necessary for successful hatching!
Abnormal positions of a bird embryo
Chick quality. Criteria for poor condition
- low BW (<42g)
- open navel
- omphalitis
What is omphalitis? General signs?
