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Table 1 Farms and flocks included in the study

From: High genetic diversity among extraintestinal Escherichia coli isolates in pullets and layers revealed by a longitudinal study

Rearing farm

Layer farm/flock

Farm identificationa

Location

Farm

Flock identificationb

Location

Housing systemc

Flock sized

RI

Lower Austria

1

L1/I

Styria

FR

7500

L2/I

Styria

FR

3800

L3/I

Styria

DL

3440

RII

Salzburg

2

L1/II

Carinthia

ORG

3000

3

L2/II

Lower Austria

ORG

3000

RIII

Styria

4

L1/III

Burgenland

ORG

6000

L2/III

Burgenland

ORG

6000

L3/III

Burgenland

ORG

6000

RIV

Upper Austria

5

L1/IV

Lower Austria

DL

5980

L2/IV

Lower Austria

DL

10890

L3/IV

Lower Austria

DL

9030

RV

Styria

6

L1/V

Styria

DL

17738

7

L2/V

Styria

DL

14950

RVI

Burgenland

8

L1/VI

Styria

DL

2950

L2/VI

Styria

FR

7300

  1. asix rearing farms are indicated as RI - RVI (all birds were kept in deep litter system)
  2. blayer flocks are designated with letter “L” along with flock number/corresponding rearing farm number
  3. chousing system: FR – conventional free range, ORG – organic free range, DL – deep litter
  4. dnumber of birds in each layer flock