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Table I.

Susceptibility of bacteria found in Xenopus oocytes

Antibiotic Bacterial susceptibility (MIC) 
 Pseudomonas sp. S. maltophilia 
Amikacin S 4 (5/5) S 4 (5/5) 
Amoxicillin/Clavulanic Acid R ≥ 32 (5/5) R ≥ 32 (5/5) 
Amoxicillin R ≥ 32 (5/5) R ≥ 32 (5/5) 
Cefazolin R (5/5) R (5/5) 
Cefixime R (5/5) R (5/5) 
Cefotaxime R (5/5) R (5/5) 
Cefpodoxime R (5/5) R (5/5) 
Ceftazidime S ≤ 8 (3/5), R (1/5), I 16 (1/5) S ≤ 8 (5/5) 
Ceftiofur R ≥ 8 (5/5) R ≥ 8 (5/5) 
Ceftriaxone R (4/5), I (1/5) R (4/5), I (1/5) 
Cefuroxime R (5/5) R (5/5) 
Cefalexin R ≥ 32 (5/5) R ≥ 32 (5/5) 
Chloramphenicol R ≥ 32 (5/5) R ≥ 32 (5/5) 
Ciprofloxacin S ≤ 0.05 (5/5) S ≤ 0.05 (5/5) 
Difloxacin R (5/5) R (5/5) 
Enrofloxacin R ≥ 2 (2/5), I 1 (3/5) R ≥ 2 (5/5) 
Gentamicin R ≥ 16 (5/5) R ≥ 16 (5/5) 
Imipenem S (5/5) S (5/5) 
Marbofloxacin R (2/5), I (3/5) R (4/5), I (1/5) 
Ofloxacin R (3/5), I (2/5) R (5/5) 
Orbifloxacin R (5/5) R (5/5) 
Piperacillin I 64 (4/5), I 128 (1/5) I 64 (5/5) 
Tetracycline R ≥ 16 (5/5) R ≥ 16 (5/5) 
Ticarcillin R ≥ 256 (5/5) R ≥ 256 (5/5) 
Tobramycin R ≥ 16 (5/5) R ≥ 16 (5/5) 
Antibiotic Bacterial susceptibility (MIC) 
 Pseudomonas sp. S. maltophilia 
Amikacin S 4 (5/5) S 4 (5/5) 
Amoxicillin/Clavulanic Acid R ≥ 32 (5/5) R ≥ 32 (5/5) 
Amoxicillin R ≥ 32 (5/5) R ≥ 32 (5/5) 
Cefazolin R (5/5) R (5/5) 
Cefixime R (5/5) R (5/5) 
Cefotaxime R (5/5) R (5/5) 
Cefpodoxime R (5/5) R (5/5) 
Ceftazidime S ≤ 8 (3/5), R (1/5), I 16 (1/5) S ≤ 8 (5/5) 
Ceftiofur R ≥ 8 (5/5) R ≥ 8 (5/5) 
Ceftriaxone R (4/5), I (1/5) R (4/5), I (1/5) 
Cefuroxime R (5/5) R (5/5) 
Cefalexin R ≥ 32 (5/5) R ≥ 32 (5/5) 
Chloramphenicol R ≥ 32 (5/5) R ≥ 32 (5/5) 
Ciprofloxacin S ≤ 0.05 (5/5) S ≤ 0.05 (5/5) 
Difloxacin R (5/5) R (5/5) 
Enrofloxacin R ≥ 2 (2/5), I 1 (3/5) R ≥ 2 (5/5) 
Gentamicin R ≥ 16 (5/5) R ≥ 16 (5/5) 
Imipenem S (5/5) S (5/5) 
Marbofloxacin R (2/5), I (3/5) R (4/5), I (1/5) 
Ofloxacin R (3/5), I (2/5) R (5/5) 
Orbifloxacin R (5/5) R (5/5) 
Piperacillin I 64 (4/5), I 128 (1/5) I 64 (5/5) 
Tetracycline R ≥ 16 (5/5) R ≥ 16 (5/5) 
Ticarcillin R ≥ 256 (5/5) R ≥ 256 (5/5) 
Tobramycin R ≥ 16 (5/5) R ≥ 16 (5/5) 

Bacterial culture results from 10 samples of affected oocytes. Both P. fluorescens and P. putida (Pseudomonas sp.) had identical bacterial susceptibility. S, susceptible; I, intermediate; R, resistant. Minimum inhibitory concentration (MIC) is represented in micrograms/milliliter. Results without MIC values were performed by disc testing. The numbers in parentheses represent the number of colonies with the indicated susceptibility/the total number of oocyte samples that grew that species of bacteria.

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