In this task, you are given a sentence. You are expected to recognize the name of gene or protein. Although there might be several correct answers, you need to write one of them.

Example input: Sox - 4 is important for very early B - cell differentiation , while TCF - 1 / LEF - 1 play a crucial role in early thymocyte development 
Example output: TCF - 1
Example explanation: The gene, TCF - 1 has been tagged as protein since it plays a crucial role in early thymocyte development.
Q:  Naturally acquired human infection with B . mallei , although not seen in the United States since 1945 , has occurred rarely and sporadically among laboratory workers and those in direct contact with infected animals [ 2 ] .
A:
B . mallei