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Table 2 Number of chickens, parasitic (A. galli), bacterial (nalidixic-acid-resistant O78 E. coli) and pathological findings of second experiment with primary A. galli infections superimposed by secondary E. coli infections

From: Consequences of concurrent Ascaridia galli and Escherichia coliinfections in chickens

Group Type, route and dose of infection Group size No of dead animals during experiment Post-mortem findings at slaughter
     Pathological changes Worm burden (± S.D.) Re-isolation of E. coli
Ag Oral 500 A. galli eggs 25 0 25 neg. 5.6 ± 11.0 25 neg.
Ag+Ec8O Oral 500 A. galli eggs + oral E. coli with 108 cfu 37 0 37 neg. 14.0 ± 1 8.0 37 neg.
Ag+Ec8T Oral 500 A. galli eggs + tracheal E. coli with 108 cfu 38 11 1 PS + PC + AS, 1 FPPS +LNC, 1 FPPC, 34 neg. 10.0 ± 1 4.0 37 neg.
Ec8O Oral E. coli with 108 cfu 25 12 24 neg. 0 24 neg.
Ec8T Tracheal E. coli with 108 cfu 25 43 21 neg. 0 21 neg.
Control Uninfected control 25 34 22 neg. 0 22 neg.
  1. AS = airsacculitis; FP = fibrinopurulent; L = liver; neg = negative; NC = necrosis; PC = pericarditis; PS = polyserositis; SP = spleen; 1 One animal died after the 2nd infection testing positive for a nalidixic-acid-resistant E. coli in liver and spleen and with necrosis of the spleen.
  2. 2 One animal died after first infection with polyserositis, but was negative for bacteriology.
  3. 3 Four animals died after the infection with E. coli; three animals tested positive for a nalidixic-acid-resistant E. coli in liver and spleen. Of these two animals had fibrinopurulent pericarditis, one had polyserositis and the remaining E. coli negative chicken had fibrinopurulent salpingitis.
  4. 4 Three animals died due to cannibalism, but had no other pathological findings.