Efficacy of QAX576 in Asthma

Inclusion Criteria: * Male and female patients * Female patients must be surgically sterilized or postmenopausal * Male patients must use two forms of contraception * Body mass index must be between 18 and 39 kg/m2 * Diagnosis of asthma for at least one year, which is not adequately controlled by inhaled corticosteroids and long acting beta-2 agonists Exclusion Criteria: * Smoking history \>10 pack-years * Patients with a diagnosis of chronic obstructive pulmonary disease (COPD) * Patients who have experienced a severe asthma attack/exacerbation requiring systemic corticosteroids or an increase in maintenance doses, within 6 weeks of screening * Patients who have had a respiratory tract infection within 6 weeks prior to screening * History of schistosomiasis, within 6 months of screening, or traveling to a country endemic with schistosomiasis within 6 months of completing the study