Which of the following statements best describes the habitats of Achromobacter, Alcaligenes, and Bordetella?
a. The habitats are limited to the upper res-piratory tract of various mammals.
b. The habitats vary from the soil and water environment to the upper respiratory tract of various mammals.
c. The habitats are limited to the soil and water environment.
d. The habitats are limited to the mucous membranes of humans and animals.
B
The diversity of the organisms' habitats is reflected in the various ways they are transmitted. For example, transmission of environmental isolates such as A. denitrificans frequently involves ex-posure of patients who are debilitated to contaminated fluids or medical solutions. In contrast, B. bronchiseptica transmission primarily occurs by close contact with animals, whereas Bordetella holmesii has been detected only in human blood, and no niche or mode of transmission is known. The habitats of the species listed vary from the soil and water environments to the upper respira-tory tract of various mammals.
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