Table 2.
Distribution of the identified bacterial species by bacterial group and region.
| Bacterial group | Northern Queensland | Southeast Queensland | Victoria | Total (%)§ |
|---|---|---|---|---|
| The total number of identified isolates (% of total) | 78 (38%) | 73 (36%) | 54 (26%) | 205 (100%) |
| Enterobacteriaceae; n (% of total) | 12 (15%) | 8 (11%) | 7 (13%) | 27 (13%) |
| Escherichia coli | 5 | 1 | 5 | 11 |
| Enterobacter cloacae | 0 | 7 | 0 | 7 |
| Serratia marcescens | 5 | 0 | 0 | 5 |
| Enterobacter asburiae | 1 | 0 | 0 | 1 |
| Citrobacter species | 0 | 0 | 2 | 2 |
| Pantoea eucrina | 1 | 0 | 0 | 1 |
| Staphylococcus aureus; n (% of total) | 2 (3%) | 5 (7%) | 16 (30%) | 23 (11%) |
| Streptococcus spp.; n (% of total) | 10 (13%) | 8 (11%) | 12 (22%) | 30 (15%) |
| Streptococcus uberis | 6 | 8 | 4 | 18 |
| Streptococcus agalactiae | 0 | 0 | 7 | 7 |
| Streptococcus dysgalactiae | 1 | 0 | 0 | 1 |
| Streptococcus species | 3 | 0 | 1 | 4 |
| Non-aureus staphylococci; n (% of total) | 32 (42%) | 27 (37%) | 7 (13%) | 66 (32%) |
| Staphylococcus chromogenes | 8 | 22 | 0 | 40 |
| Staphylococcus haemolyticus | 12 | 1 | 3 | 16 |
| Staphylococcus warneri | 0 | 0 | 2 | 2 |
| Staphylococcus sciuri | 1 | 0 | 1 | 2 |
| Staphylococcus simulans | 0 | 2 | 0 | 2 |
| Staphylococcus equorum | 1 | 0 | 0 | 1 |
| Staphylococcus hominis | 0 | 1 | 0 | 1 |
| Staphylococcus hyicus | 0 | 1 | 0 | 1 |
| Staphylococcus xylosus | 0 | 0 | 1 | 1 |
| Bacillus spp.; n (% of total) | 15 (19%) | 7 (10%) | 5 (9%) | 27 (13%) |
| Bacillus megaterium | 4 | 6 | 0 | 10 |
| Bacillus pumilus | 5 | 0 | 1 | 6 |
| Bacillus cereus | 0 | 1 | 1 | 2 |
| Bacillus licheniformis | 0 | 0 | 1 | 1 |
| Bacillus subtilis | 0 | 0 | 1 | 1 |
| Bacillus species | 6 | 0 | 1 | 7 |
| Others; n (% of total) | 7 (9%) | 18 (25%) | 7 (13%) | 32 (16%) |
| Acinetobacter venetianus | 0 | 2 | 0 | 2 |
| Aerococcus species | 1 | 0 | 0 | 1 |
| Aerococcus viridans | 0 | 3 | 2 | 5 |
| Corynebacterium auriscanis | 0 | 1 | 0 | 1 |
| Corynebacterium bovis | 0 | 5 | 2 | 7 |
| Corynebacterium falsenii | 1 | 0 | 0 | 1 |
| Corynebacterium species | 0 | 0 | 1 | 1 |
| Corynebacterium xerosis | 0 | 1 | 0 | 1 |
| Enterococcus faecium | 0 | 3 | 0 | 3 |
| Exiguobacterium sp[3] | 0 | 1 | 0 | 1 |
| Lactococcus garvieae | 1 | 0 | 0 | 1 |
| Pasteurella multocida | 1 | 0 | 1 | 2 |
| Pseudomonas aeruginosa | 0 | 1 | 0 | 1 |
| Pseudomonas species | 1 | 0 | 0 | 1 |
| Pseudomonas stutzeri | 0 | 1 | 0 | 1 |
| Rothia terrae | 2 | 0 | 1 | 3 |
Bacterial species were cultured from milk samples collected from 151 clinical mastitis quarters and 268 apparently healthy control quarters from 18 dairy herds located in Northern Queensland, Southeast Queensland, and Victoria between March and June 2019.
§
Percentages were calculated out of the column total.