Pleurotus ostreatus extract Enhances the Phagocytic Actions of Neutrophils against Streptococcus pneumoniae Angus Nnamdi Oli, Angus Nnamdi Oli*, Akunna Perpetual Emeruwa, Obinna Ikechukwu Ekwunife, Ebele Linda Okoye, Chinekwu S. Anyaoku, Gordon C. Ibeanu, Ejeatuluchukwu Obi, Chibueze Peter Ihekwereme and Monday Obaji