Exam 11: Travelers Diarrhea: Identifying the Causative Agent

Infection with which of the following organisms is more often noted for the production of a lymphocytosis rather than a mononucleosis?

A segmented, ambisense genome is found in

Which of the following virulence factors is produced by several genera of bacteria that are notable mucosal colonizers including S. pneumoniae?

A 24-year-old man hospitalized in a coma for 2 weeks now has developed erythema around his catheter. You order the catheter to be pulled, the tip cultured, and a new line to be started on the opposite side of the body. The report comes back that it is Staphylococcus epidermidis, which does not surprise you, as it is noted for the production of a loose network of polysaccharide sticking to catheters. What is this layer on the cell called?

Goodpasture's syndrome is characterized by glomerulonephritis in genetically susceptible individuals. The responsible antigen is

A female infant is born to a 16-year-old mother. The infant shows signs and symptoms of hepatosplenomegaly, jaundice, low birth weight, chorioretinitis, and microcephaly. The mother appears healthy and reports an unremarkable pregnancy except for a period during the third month when she developed a fever, sore throat, and became extremely fatigued for a period of 10 days. The most likely causative pathogen for the infant's disease is

A woman who is an intravenous drug abuser and who has been a prostitute for the past 20 years now has an aortitis. She has no mucosal ulcerations or exanthems. Her VDRL (Venereal Disease Research Laboratory) test is negative and her fluorescent treponemal antibody absorption test is positive. What is the most likely diagnosis?

A characteristic of patients with systemic lupus erythematosus (SLE) is

A 65-year-old female Peace Corps worker is sent back to the states from East Africa because she had had a very high fever and African sleeping sickness is suspected. What characteristic of the organism makes it a fatal infection unless treated properly?

What is transferred when an $F^+$ cell is crossed with an $F^-$ cell?

A 29-year-old woman developed an erythema at the insertion site of her intravenous line. Culture of the catheter tip indicates that a biofilm is present on the catheter. What is the most likely causative agent?

An oncogene that codes for a guaninenucleotide-binding protein is found in

Five children in Mrs. Thompson's third grade class develop a disease which begins as a bright red rash on the face, turns violet after a few days, then disappears; then, a maculopapular rash appears on the trunk, buttocks, and extremities. It soon fades from the trunk but persists on the thighs and forearms. Two children have also had a slight fever and a sore throat, but none were terribly sick. The genetic material of the most likely causative infectious agent is

Intracellular survival and replication are the major virulence factors rather than exotoxin production for which of the following organisms?

A patient with sickle cell anemia is most likely to have repeated septicemias and possible osteomyelitis with which agent?

A 60-year-old man who traveled to Haiti and took prophylactic chloroquine but stopped just as he left the region now has developed Plasmodium vivax malaria. What stage(s) was/ were not eliminated because he stopped taking the drug early?

A 20-year-old female has signs and symptoms consistent with genital warts. What would have been the best approach to prevent this disease?

The agent in question 31, which is causing the ascending urinary tract infection and pyelonephritis, has a normal flora "fraternal twin" of the same genus and species. What virulence factor does the pathogen have and the normal flora organism lack even although both are E coli?

N-acetylmuramic acid is located in

A 65-year-old male appears in your office complaining of a sudden onset influenza-like illness characterized by high fever, chills, backache, headache, myalgia, and retro-orbital pain. There has also been some nausea and vomiting. Which of the following possible viral infections are you most concerned about as the cause of his symptoms?