Microbiology Exam 2004 Part 1

Type III hypersensitivity is mediated by which of the following cells?

Which of the following two sites in the oral cavity would have the most similar types of microbial flora?

Protection against encapsulated bacteria is mediated by

Which of the following bacterial species would MOST LIKELY be isolated from a carious lesion on the root of a tooth?

Shingles or herpes caused by HPS that undergoes latency in dorsal root ganglion. Which of the following is used as a vaccine against this herpesvirus?

A restriction endonuclease

Chronic gingivitis has a predominance of

Porphyromonas gingivalis is associated with

If an Ab can block the attachment of HIV to a helper cell then the Ab MOST LIKELY binds to

A definitive diagnosis of gonorrhea can be made by

an enzyme produced by Porphyomonas gingivalis that is significance in pathogenesis of periodontitis?

Cytokines secreted by TH1 includes

Antibodies are produced in

Which of the following statements about TB is correct?

Tetracycline is used in the treatment of localized aggressive periodontitis (formerly localized juvenile periodontitis). Tetracycline exerts its effects on oral bacteria by

Patient dies within 10 minutes following injection of penicillin to treat abscess. What type of hypersensitivity reaction is responsible for this?

Which of the following can be found in both gram-negative and gram positive bacteria?

Nongonococcal urethritis caused by Chlamydia trachoma's and gonorhea are similar in that BOTH

BActerial antibiotic resistance genes commonly reside on

a 17 year old female reports to the STD clinic. Her complaint is tiredness and persistent swelling of her lymph nodes. The lab reports that HIV ELISA was positive once but not when it was repeated. A western blot was not done. They reported presence of P24 antigen in her blood. What statement is MOST LIKELY correct?

Which of the following statements is TRUE concerning peptidoglycan?

Which of the following is the B cell receptor for antigen?

Which of the following viruses causes persistent infections of the skin and mucous membranes landing to anogenital warts?

Which of the following cardiac conditions requires prophylactic antibiotic treatment for subacute bacterial endocarditis before dental procedures?

You are conducting a clinical trial for an experimental maxillofacial bone graft. Which would have the BEST chance for success?

Acyelovir is a drug of choice for many herpesvirus infections. Which of the following are affected by this drug?

Bacterial spores are resistant to many chemicals and heat. Which of the following statements is TRUE concerning them?

Burkitts lymphoma, a tumor of the lower jaw of the African children, is caused by a DNA virus multiplies and undergoes latency in

Which of the following is unique to gram negative bacteria?

Which of the following agents or processes can kill spores?

In chronic periodontitis the types of organisms that are MOST LIKELY to be found at the site of the lesion include

Which one of the following pairs of disease may be transmitted by the bite of a tick?

The most common route for the development of pulpitis

Which of the following statements about the phases of HIV infection is CORRECT?

Tetracycline is contraindicated in the treatment of infections of pregnant women because this antibiotic

Which of the following organisms produces a toxin that inhibits the release of acetylcholine causing flaccid paralysis?

A major virulence determinant of Streptococcus mutants is associated with its ability to produce which of the following extracellular enzymes?

condyloma acuminata or anogenital warts is caused by papillomaviruses that are confined to the skin and mucous membranes. Which of the following important feature of papillomaviruses?

Measles virus mostly causes an acute infection. Sometimes, it can cause a chronic infection leading to a demyelinating disorder known as

A RNA viral agent causes oral lesions associated with herpangina. Which of the following BEST describes this viral agent?

Analysis of a specimen from a patients mycetoma on the right ankle revealed the presence of acid-fast filamentous bacteria. The infection is MOST LIKELY due to

The gram negative bacteria produces a green pigment and has a predilection for patients with burns or cystic fibrosis. Which of the following is another CORRECT statement about this organism?

Which of the following agents is used to treat infections of individuals who are allergic to penicillin?

Metronidazole was first introduced to treat protozoal infections. However, the drug is now used to treat oral infections including acute necrotizing ulcerative gingivitis. Metronidazole is effective in the treatment of oral infections because of its activity against which of the following?

Which one of the following enzymes is used by the virus that causes adult T cell leukemia?

Anthrax occurs when a person

For which of the following viral infections are both active and passive immunization recommended after exposure to the viral agent?

The mutant streptococci are both acidogenic and acidic. With respect to these properties, which of the following statements BEST describes these bacteria?

A 26 year old male suffers from viral hepatitis for almost 8 months. Examination of his liver tissue reveals the presence of a RNA virus genome. Within a few years, the patient develops heptocellular carcinoma. Interferon therapy was recommended. Which of the following is TRUE for this causative viral agent?

Which of the following viruses causes a known congenital infection that can lead to severe damage to the fetus is infected during the first trimester of pregnancy?