Efficacy and Safety Trial to Assess Moxifloxacin in Treating Community-Acquired Pneumonia (CAP) With Aspiration Factors

Inclusion Criteria: * Male or female patients aged 18 years or above. * Patients who are willing and able to provide written informed consent. * Accord with the diagnosis criteria of CAP based on clinical, radiological and microbiological findings. * With aspiration factors (Including swallowing or coughing reflection test positive) Exclusion Criteria: * Known hypersensitivity to fluoroquinolones and/or metronidazole. * Female patients who are pregnant or lactating. * Patients with mechanical ventilation lasting more than 48 hours prior to enrollment. * Patients with neutropenia (neutrophil count \<1.000/mm3) due to malignancy or chemotherapy. * Patients with a severe, life-threatening disease with a life expectancy of less than 2 months. * Patients with a co-existent disease considered likely to affect the outcome of the study (e.g. lung cancer, cystic fibrosis, collagen vascular disease affecting the lungs, pleural empyema, severe cardiac failure class III or IV of the NYHA). * Patients with poststenotic pneumonia (e.g. in connection with carcinoma of the lung). * Patients with acute infarction pneumonia. * Patients with active pulmonary tuberculosis. * Patients with lung abscess/pneumonia with concomitant endocarditis. * Patients with known i.v. drug abuse. * Patients known to have AIDS (CD4 count \<200/ul) or HIV-seropositives who are receiving HAART (highly activated antiretroviral therapy). Note: HIV-positive patients may be included. HIV testing is not required for this study protocol. * Patients with severe hepatic impairment (Child-Pugh C). * Patients on hemodialysis, equivalent to creatinine clearance \<15 ml/min/1.73 m2. * Patients known to have congenital or sporadic syndromes of QTc prolongation, or are receiving concomitant medication reported to increase the QTc interval, e.g. amiodaron, sotalol, disopyramide, quinidine, procainamide, terfenadine. * Previous history of tendinopathy with quinolones. * Patients who have previously been included in this study. * Patients with any investigational drug within 30 days of screening. * Patients requiring concomitant systemic antibacterial agents. * Pre-treatment with a systemic antibacterial agent within 24 hours prior to enrollment (Except for the cases that pre-treatment is not effective based on the clinical judgment). * Severe CAP. * Other contraindications in package insert.