Pre Medical Science Cs #13

670 Words Jan 2nd, 2014 3 Pages
CS#13

You work in a small family practice in rural Virginia, (much better than Texas!). A man in his early 50s comes in with a complaint of intermittent fever (102-103 F) and headache for the past two weeks. The physician examines him and takes a history. The only clinical finding is a wound about the size of a quarter on his right thumb. Axillary lymph nodes are swollen and tender. The man says he cut himself while skinning a rabbit three days ago. On the basis of these observations the physician prescribes streptomycin and asks the man to call if his symptoms don’t improve in three days.

The physician asks you to draw blood and tells the patient he should return in four weeks for another blood sample. She says there is no
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The goal of treatment is to cure the infection with antibiotics; commonly used antibiotics include: Streptomycin and tetracycline, tetracycline is not considered a first line treatment and is also not given to children until all of their permanent teeth come in (due to the chance that incoming teeth will become permanently discolored.

The bacterium that causes tularemia is Francisella tularensis. The bacterium Francisella tularensis is a pathogenic species of Gram-negative bacteria which is nonmotile, and strictly aerobic; it is also the causative agent of the pneumonic form of tularemia, which is often lethal without treatment. In the gram stain it is red/pink in color and it appears in small rods.

2. The natural reservoirs for Francisella tularensis, the causative agent of tularemia, are small and medium-sized mammals which in this case would be the rabbit that the man was skinning.

3. The reason that the doctor asks for a serological (blood serum) test now and to repeat the test in four weeks is because the serological test tests for Antibodies which defend the body against some bacteria, viruses, fungi, or other foreign substances which are called antigens. Certain cells of the immune system cause the body to produce antibodies during an active infection. 4. When the illness is first acquired, a few