Table 1 Infection groups used for the determination of dose and infection route of E. coli
From: Consequences of concurrent Ascaridia galli and Escherichia coliinfections in chickens
Group | Type of infection | Group size | Pathological findings |
|---|---|---|---|
Ag+Ec40 | A. galli (primary infection) given as oral dose of 500 embryonated eggs + E. coli (secondary infection) given as oral dose of 104 cfu. | 5 | No pathological findings |
Ag+Ec4T | A. galli (primary infection) given as oral dose of 500 embryonated eggs + E. coli (secondary infection) given as tracheal dose of 104 cfu. | 6 | 1 animal with polyserositis, †1 animal with pericarditis and doublesided pneumonia |
Ag+Ec8O | A. galli (primary infection) given as oral dose of 500 embryonated eggs + E. coli (secondary infection) given as oral dose of 108 cfu.6 | Â | No pathological findings |
Ag+Ec8T | A. galli (primary infection) given as oral dose of 500 embryonated eggs + E. coli (secondary infection) given as tracheal dose of 108 cfu. | 6 | 1 animal with fibrinopurulent polyserositis 1 animal with pericarditis and purulent double sided pneumonia 1 animal with pericarditis and double sided airsacculitis |
Ec4O | E. coli given as oral dose of 104 cfu. | 5 | No pathological findings |
Ec4T | E. coli given as tracheal dose of 104 cfu. | 6 | No pathological findings |
Ec8O | E. coli given as oral dose of 108 cfu. | 6 | No pathological findings |
Ec8T | E. coli given as tracheal dose of 108 cfu. | 6 | 2 animals with pericarditis and double sided airsacculitis 1 animal with polyserositis and right sided pneumonia, †1 animal with polyserositis and double sided pneumonia,†|
Control | Uninfected control | 6 | No pathological findings |