Ocular penetration of subconjunctival oxacillin, methicillin, and cefazolin in rabbits with staphylococcal endophthalmitis.
Ocular penetration of subconjunctival oxacillin, methicillin, and cefazolin in rabbits with staphylococcal endophthalmitis.
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结膜下苯唑西林、甲氧西林和头孢唑啉在患有葡萄球菌性眼内炎的兔子中的眼部渗透。
DOI:
10.1093/infdis/145.6.899
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发表时间:
1982
期刊:
影响因子:
--
通讯作者:
Baum,J
中科院分区:
文献类型:
--
作者:
Barza,M;Kane,A;Baum,J
The concentrations of oxacillin, methicillin, and cefazolin were examined in the infected eyes of pigmented rabbits withStaphyloccus aureusendophthalmitis after a subconjunctival dose of 100 mg. The three drugs had fairly similar ocular pharmacokinetics. The tissue concentration usually peaked within 30 min. Levels in the aqueous humor rose more slowly; the respective maximal concentrations of methicillin, oxacillin, and cefazolin were 72, 1,180, and 111 µ/ml. Oxacillin also produced the highest levels in the cornea. Penetration of the vitreous humor was poor with all three drugs, apparently owing to a diffusional barrier in the choroid-retina tissue complex. The respective median vitreous levels of methicillin, oxacillin, and cefazolin were 0.7, 0.6, and < 0.8 µ/ml. These values are close to the concentrations usually required to inhibitS. aureusin vitro. Our results suggest that subconjunctival oxacillin achieves higher concentrations in anterior ocular tissues than do the other two drugs, but that more aggressive approaches are necessary in treating endophthalmitis.
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