meningococcus的复数形式怎么写？

...

Bacteria ( including meningococcus , among others ), often from infection elsewhere, produce the most dangerous forms.由身体其它部位的细菌 ( 包含脑膜炎球菌在内 ) 传染所造成的最严重的感染形式....

meningococcus的音标：meningococcus的英式发音音标为：[məˌnɪŋgə'kɒkəs]meningococcus的美式发音音标为：[məˌnɪŋgə'kɒkəs]...