Select a Community
Are you sure you want to trigger topic in your Anconeus AI algorithm?
You are done for today with this topic.
Would you like to start learning session with this topic items scheduled for future?
Positive quellung reaction
55%
157/284
Negative quellung reaction
5%
13/284
Lactose fermentation
7%
21/284
Urease positive
14/284
Negative catalase test
23%
64/284
Select Answer to see Preferred Response
Due to the lack of vaccinations, living in close quarters such as the college dormitory, and the symptoms of fever, severe headache, nuchal rigidity, and photophobia, this male is most likely experiencing meningitis caused by Neisseria meningitidis. N. meningitidis would demonstrate a positive quellung reaction because it contains a capsule. N. meningitidis is a maltose-fermenting, catalase positive, gram-negative cocci that is transmitted via oral and respiratory secretions. The difference between N. gonorrhea and N. meningitidis is the presence of a polysaccharide capsule which would produce a positive quellung reaction when anticapsular antisera is added. The capsule is also used to classify strains into serogroups. High risk groups typically include those who live in close quarters such as college students in dormitories, the military, and infants 6 months to 2 years since maternal antibodies only confer protection during the first 6 months of life. Kimmel reviews the prevention of meningitis via the meningococcal vaccine which contains the most common serotypes (A, C, Y, and W-135) that cause over 70 to 80 percent of infections. For those individuals who are in close contact with an infected individual, it is recommended that they receive antibiotic chemoprophylaxis with rifampin, ciprofloxacin, or ceftriaxone. Keiser et al. discuss three case reports of meningitis in the military all resulting in fatalities. Although every member of the military receives the quadrivalent meningitis vaccine, the rate of meningococcal disease is roughly similar or greater than the civilian population. Individuals from all parts of the US are brought together during training and undergo extreme training which is believe to further predispose them to the disease. Although the vaccine is given, it is still necessary to remain vigilant when living in close quarters and suspecting symptoms begin to present in an individual. Illustration A contrasts a negative and a positive quellung reaction. Incorrect Answers: Answer 2-5: These are not characteristics of N. meningitidis.
3.6
(7)
Please Login to add comment