Gene/Protein Disease Symptom Drug Enzyme Compound
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The effectiveness of the delivery of amoxicillin to Atlantic salmon, undergoing chemotherapy in natural outbreaks of furunculosis in sea-cages, was investigated by measuring the concentration of the drug in serum samples. Five groups of 50 sera from three outbreaks were collected two hours after oral treatment with doses of 80 or 120 mg/kg bodyweight. Amoxicillin was detected in 82, 82, 92, 100 and 90 per cent of the sera in the five groups (limit of detection 0.16 microgram/ml). Many sera contained less than the minimum inhibitory concentration of amoxicillin for the causative agent Aeromonas salmonicida (0.3 microgram/ml), but a concentration more than double the minimum inhibitory concentration was achieved in 2, 2, 56, 32 and 44 per cent of the samples. There was wide variation in the serum concentrations between individuals in the same population and between populations receiving the same treatment; this variation was associated with population factors, the severity of infection and the accuracy of medicating the feed.
Vet Rec
PMID:Amoxicillin concentrations in the serum of Atlantic salmon (Salmo salar L) during furunculosis therapy. 812 52

The aim of this study was to investigate the prevalence of bacterial species isolated from bronchoalveolar lavage fluid (BALF) samples taken from dogs with respiratory signs and to determine their antibiotic susceptibility. Clinical cases were included in the study if they showed signs of respiratory disease and data relating to bacterial culture and susceptibility of BALF samples were available. The medical records of 493 privately owned dogs that were presented between January 1989 and December 2011 were evaluated retrospectively. In 35 per cent of samples, no bacteria were cultured. Bacteria isolated from culture-positive samples included Streptococcus species (31 per cent of positive cultures), Enterobacteriaceae (30 per cent, including Escherichia coli (15 per cent)), Staphylococcus species (19 per cent), Pasteurella species (16 per cent) and Pseudomonas species (14 per cent). Bordetella bronchiseptica as a primary respiratory pathogen was isolated in 8 per cent of cases. Enrofloxacin showed the best susceptibility pattern; 86 per cent of all isolates and 87 per cent of Gram-negative bacteria were susceptible to this antibiotic. Amoxicillin/clavulanic acid yielded the best susceptibility pattern in Gram-positive bacteria (92 per cent). Therefore, these antibiotics can be recommended for empirical or first-line treatment in dogs with bacterial lower respiratory tract infections.
Vet Rec 2015 Apr 04
PMID:Antibiotic susceptibility of bacterial isolates from 502 dogs with respiratory signs. 2585 94