Survival of Mycobacterium avium subsp paratuberculosis in amitraz cattle dip fluid.
OBJECTIVE
To determine the survival time of Mycobacterium avium subsp paratuberculosis in amitraz-based cattle dip fluid derived from an active dip site in northern New South Wales.


METHODS
Following inoculation of triplicate 5 L containers with faeces (0.5 g/L) from a clinical case of bovine paratuberculosis, samples collected up to 8 weeks after inoculation were examined by conventional and radiometric culture. M a paratuberculosis colonies were enumerated on solid media.


CONCLUSIONS
M a paratuberculosis survived in amitraz cattle dip fluid for up to 2 weeks, but not 3 weeks. Where 1% of solids in dip fluid is derived from a clinical case of paratuberculosis, dip fluid may contain viable M a paratuberculosis for at least 2 weeks. These findings have implications for the management of cattle dip sites.
Eamens
G
G
New South Wales Agriculture, Elizabeth Macarthur Agricultural Institute, Camden.
Spence
S
S
Turner
M
M
D000287:Administration, Topical; D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000382:microbiology* / Q000635:transmission; D015169:Colony Count, Microbial / Q000662:veterinary; D004197:Disease Reservoirs / Q000662:veterinary; D005243:Feces / Q000382:microbiology; D006863:Hydrogen-Ion Concentration; D007306:Insecticides / Q000008:administration & dosage / Q000494:pharmacology; D016927:Mycobacterium avium subsp. paratuberculosis / Q000187:drug effects / Q000254:growth & development* / Q000302:isolation & purification; D010283:Paratuberculosis / Q000382:microbiology* / Q000635:transmission; D013997:Time Factors; D014052:Toluidines / Q000008:administration & dosage / Q000494:pharmacology
D007306:Insecticides; D014052:Toluidines; C014983:amitraz