Infectious bronchitis

Question 1

Infectious bronchitis

Answer 1

Prototype of coronaviridae

Affects chicks

Question 2

Serotypes

Answer 2

Massachusetts and connecticut

Question 3

Transmission of infectiois bronchitis

Answer 3

Aerosols and food contaminated with faeces

Question 4

Viremiaa of infectious bronchitis

Answer 4

Virus replicate in ciliated epithelial cells

Then to ovaries oviduct kidneys

Question 5

Infectious bronchitis incubation period 🥰d

Answer 5

18 to 48 hours

Question 6

Infection of young female chicks may result in permanent hypoplasia of the oviduct that is evident later in life as

Answer 6

Infection of young female chicks may result in permanent hypoplasia of the oviduct that is evident later in life as reduced egg production and inferior quality eggs.

Question 7

Egg laying chickens

Affected have

Answer 7

Decline in egg production

Lack of calcified shells

Atrophy of kidney lobules

Question 8

Lesions of infectious bronchitis

Answer 8

Mucosal thickening with catarrhal exudate in nasal passages

Proventriculus enlargement

Pneumonia and conjuctivitis

Question 9

Virus isolatio n

Answer 9

Live birds :tracheal samples
Dead birds kidney, oviduct, cecal tonsils

Isolation in chicken embryos

Question 10

Differential diagnosis of infectious bronchitia

Answer 10

Infectious coryza,
Infectious laryngotracheatis
ND

Question 11

Vaccines

Answer 11

Live attenuated and inactive vaccines are available

1 day old and booster on 18 th day
Intranasal intraocular