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[Pivampicillin and ampicillin in experimental E. coli pyelonephritis]
Abstract:
The antimicrobiol activity of 6-[D(--)-alpha-aminophenylacetamido]-penicillanic acid-(pivaloyloxymethyl)-ester (privampicillin) was tested in comparison to ampicillin during the acute ascending pyelonephritis of the rat caused by E. coli. Two groups of rats were treated with different drug concentrations; group I:3 times 70 mg/kg/day pivampicillin and 3 times 50 mg/kg/day ampicillin, group II: 3 times 70 mg/kg/day pivampicillin and 3 times 150 mg/kg/day ampicillin; controls were inoculated three times daily with 1.0 ml physiological saline. A higher activity of pivampicillin was found in the first group as proved by bacterial counting in the left and the right renal parenchyma as well as in the urine. In the second group the efficacy of ampicillin was increased.
Insights
Privampicillin demonstrated higher antimicrobial activity than ampicillin in a rat pyelonephritis model. This study highlights pivampicillin
Area of Science:
- Pharmacology
- Microbiology
- Nephrology
Background:
- Ascending pyelonephritis is a significant kidney infection often caused by E. coli.
- Antibiotic efficacy in treating pyelonephritis is crucial for patient outcomes.
- Ampicillin is a commonly used antibiotic, but resistance and efficacy can vary.
Purpose of the Study:
- To compare the antimicrobial activity of pivampicillin and ampicillin.
- To evaluate their efficacy in a rat model of acute ascending pyelonephritis.
- To determine the impact of different dosages on treatment outcomes.
Main Methods:
- An acute ascending pyelonephritis model was induced in rats using E. coli.
- Two groups of rats received different concentrations of pivampicillin and ampicillin.
- Bacterial counts in renal parenchyma and urine were used to assess antimicrobial activity.
Main Results:
- Pivampicillin showed higher antimicrobial activity compared to ampicillin in Group I (lower ampicillin dose).
- In Group II (higher ampicillin dose), the efficacy of ampicillin was observed to increase.
- Bacterial load reduction in renal parenchyma and urine was analyzed.
Conclusions:
- Pivampicillin exhibits potent antimicrobial activity against E. coli in a pyelonephritis model.
- Dosage adjustments can influence the efficacy of both pivampicillin and ampicillin.
- Further research may explore optimal dosing strategies for pivampicillin in treating kidney infections.