Question 1

The most common type of infection caused by both Rhizobium radiobacter and Ochrobactrum anthropi is&#10;A)peritonitis.&#10;B)endocarditis.&#10;C)meningitis.&#10;D)bacteremia .

Accepted Answer

For both R. radiobacter and O. anthropi, bacteremia is the most common type of infection; peritonitis, endocarditis, meningitis, urinary tract, and pyogenic infections are much less commonly encountered.

Question 2

Choose the habitat of the bacterium Psychrobacter immobilis.&#10;A)Environmental only, not human flora&#10;B)Animal oral and respiratory flora&#10;C)Environmental, cold climates&#10;D)Human normal flora

Accepted Answer

Psychrobacter immobilis is an environmental organism and particularly of cold climates such as the Antarctic.

Question 3

Choose the habitat of the bacterium Paracoccus yeei.&#10;A)Environmental only, not human flora&#10;B)Animal oral and respiratory flora&#10;C)Environmental, cold climates&#10;D)Human normal flora

Accepted Answer

Paracoccus yeei is not found as part of human flora but is found only in the environment.

Question 4

The natural habitat of Achromobacter sp.can best be described as&#10;A)the mucous membranes of animals.&#10;B)the gastrointestinal tract of humans and other animals.&#10;C)the natural environment.&#10;D)the genitourinary tract of animals.

Accepted Answer

Most of the organisms discussed in Chapter 25 exist in the environment. As environmental organisms, these bacteria are rarely encountered in human specimens or infections. When they are encountered, they are found on contaminated medical devices or are isolated from immunocompromised or otherwise debilitated patients.

Question 5

Choose the habitat of the bacterium Rhizobium radiobacter.&#10;A)Environmental&#10;B)Animal oral and respiratory flora&#10;C)Environmental, cold climates&#10;D)Human normal flora

Accepted Answer

Rhizobium radiobacter inhabits the soil, and human infections occur by exposure to contaminated medical devices usually involving already ill patients.

Question 6

Valid susceptibility testing methods are not available for&#10;A)Enterobacteriaceae.&#10;B)Achromobacter.&#10;C)Pseudomonas.&#10;D)Staphylococcus.

Accepted Answer

Validated susceptibility testing methods do not exist for the organisms discussed in Chapter 25. Although many of these organisms will grow on susceptibility testing media and under the conditions recommended for testing the more commonly encountered bacteria, validated in vitro susceptibility testing methods are not available. The lack of understanding of potential underlying resistance mechanisms prohibits the validation of existing susceptibility data.

Question 7

Choose the habitat of the bacterium Ochrobactrum anthropi.&#10;A)Environmental only, not human flora&#10;B)Animal oral and respiratory flora&#10;C)Environmental, cold climates&#10;D)Human normal flora&#10;E)Environmental and human flora

Accepted Answer

Most of the organisms discussed in this chapter exist in the environment, although Ochrobactrum anthropi may occasionally inhabit the human gastrointestinal tract. The specific environmental niche of Ochrobactrum anthropi is unknown, but this organism is capable of survival in water, including moist areas within the hospital environment.

Deck 22: Achromobacter, Rhizobium, Ochrobactrum, and Similar Organisms