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Evidence on the association between antibiotic use and combination oral contraceptive (COC) failure remains controversial, with recent studies reporting no evidence to support decreased effectiveness of birth control with the use of antibiotics except rifampin and rifabutin. The reasoning is antibiotics might interfere with the effectiveness of COCs by ...


I agree with canadianer that chemical tests are generally more useful for identification. However, morphology does help and some staining techniques can be useful for identification (the Gram stain is the obvious one). If you are looking for a microscope, look for a nice scope with a 100x oil-immersion objective and a 10x ocular lens (12x would be OK too). ...

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