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There is an exception to the above guidelines where the binomial format for an organism species includes capitalization of the first word, i.e., the genus name, but the species name begins with a lower-case letter.

For example,

• • Concept
    t 24224000 |Brucella abortus (organism)|

If the species name includes any other word, they are not capitalized unless they are proper nouns, or parts of proper nouns.

For example,

• • 31989009 |Murray Valley encephalitis virus (organism)|

Salmonella serotype nomenclature

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