AN OUTBREAK OF MASTITIS DUE TO PSEUDOMONAS AERUGINOSA IN A DAIRY HERD

Characterization of antibiotic and disinfectant susceptibility profiles amongPseudomonas aeruginosaveterinary isolates recovered during 1994-2003

“…The major source for contamination by Ps. aeruginosa in the dairy is the purified water systems (Mena and Gerba 2009) used for udder washing (Malmo et al 1972) or wash hoses and spray nozzles in the parlour (Kirk and Bartlett 1984). Although Ps.…”

Pseudomonas mastitis in a dairy herd

“…Lack of response to tetracycline and streptomycin has been noted by others. [2][3][4] It is not possible to comment on the value of neomycin and gentamycin as only one cow was treated with each drug. In this outbreak, the cow treated with gentamycin survived, but was less severely affected than the other cows.…”

“…This test and slaughter program has been advocated in other outbreaks because of poor response to antibiotic therapy, persistence of the organism in the udder, and the probability of lateral transmission. [2][3][4] Similarly, subclinical infections were eliminated from this herd by culling for slaughter all cows identified as infected, particularly by composite quarter milk sampling and culture at the time of drying off. The suitability of milk sampling cows at drying off for control purposes has also been advocated elsewhere.…”

“…The University of Queensland, Queensland 4072 M astitis in cattle caused by Pseudomonas aeruginosa is uncommon and outbreaks are usually associated with contaminated udder washing water or contaminated intramammary dry-cow preparations. [1][2][3][4] Mastitis caused by P aeruginosa associated with contaminated dry-cow preparations has been reported in nonlactating cows but occurs more commonly immediately after calving and is frequently peracute in nature. 3,4 Mastitis associated with contaminated udder-washing preparations occurs throughout lactation and may be peracute, acute or, less commonly, subclinical.…”

Interactions between Pseudomonas aeruginosa and iodophor germicides in milking parlor udder wash water systems

“…Such systems are composed of the pipes and hoses used to wash the teats and udders of dairy cows before milking. Colonization of udder wash systems by the organism has been reported on several occasions (2,8,15,17); however, Erskine et al (13) were the first to mention iodophor usage in such systems colonized by P. aeruginosa. Use of a germicide in the wash water, in accordance with Food and Drug Administration recommendations (19), should prevent bacterial contamination, but Erskine et al (13) reported four herd epizootics of P. aeruginosa mastitis in which an iodophor germicide was used in the udder wash system.…”