For the oxidase test use a loop or a needle made of platinum-iridium or a glass needle (or a sterile wooden toothpick) but never a nickel-chromium or iron loop (because this give false positive reactions).

• 氧化酶试验应使用白金环或针，或玻璃针（或无菌的木制牙签），但不要用镍铬环或金属丝以免引起假阳性。