Skip to main content

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   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
  1. † the animal died during the first week of the infection trail.