Author: Miladin Kostovic

# ballum

- `Genus:............ Leptospira`
- `Species:.......... borgpetersenii`
- `Serogroup:........ Ballum`
- `Serovar:.......... ballum`
- `Strain:........... Mus 127`
- `Year:............. 1944`
- `Origin:........... Field mouse (Mus musculus spicilegus)`
- `Country:.......... *`

### History of serovar:

Borg-Peterson (1944) isolated the srain Mus 127 from the urine of a field-house mouse (Mus musculus spicilegus), and described it as a new serov ballum. It appears in the serovar list of 1959 (WHO, 1959). The strain was submited to factor analysis by Kmety (1967), which confirmed its separate serological status.

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