D

Group B streptococcus sepsis in an infant is preventable. Which one of the following procedures is most likely to reduce the incidence of group B streptococcal disease a. Intrapartum antibiotic treatment b. Use of a polysaccharide vaccine c. Screening of pregnant females in the last trimester d. Identification of possible high-risk births e. Screening of pregnant females at the first office visit, usually during the first trimester 143. There has been much speculation on the pathogenesis...

Questions

DIRECTIONS Each question below contains five suggested responses. Select the one best response to each question. 321. Infected tissues demonstrating budding fungal cells are seen in a. Coccidioidomycosis, chromomycosis, aspergillosis b. Tinea versicolor, tinea nigra, candidiasis c. Blastomycosis, paracoccidioides, dermatophytosis d. Candidiasis, cryptococcosis, and sporotrichosis e. Aspergillosis, mucormycosis, and mycetoma 322. A slide culture of a dematiaceous mold revealed the image below....

Answers

The answer is c. (Mandell, p 1547.) Bruton's agammaglobulinemia is a congenital defect that becomes apparent at approximately 6 months of age when maternal IgG is diminished. The child is unable to produce immunoglobulins and develops a series of bacterial infections characterized by recurrences and progression to more serious infections such as septicemia. Cell-mediated immunity is not affected and the child is able to respond normally to diseases that require this immune response for...

Questions 446450

The following five questions relate to immunoglobulins, IgG, M, A, D, and E. 446. Which immunoglobulin has no known function, but is present on the surface of B lymphocytes It may function as an antigen receptor. 447. Which of the following is the immunoglobulin that is initially seen on the primary immune response It is present as a monomer on B cell surfaces but as a pentamer in serum. a- IgG 448. Which immunoglobulin mediates immediate hypersensitivity and is involved in immune response to...

Virology

The answer is c. (Ryan, pp 552-554.) HIV RT PCR, a nucleic acid amplification test for HIV RNA, has recently been shown to be the most valuable test for a) monitoring a patient's progress during triple drug therapy and b) determining the chances of progression to AIDS. A viral load of 750,000 copies per ml significantly increases the chance of progression to AIDS within 5 years. The other tests listed do not accurately predict progression to AIDS. The figure below shows the basic structure of...

Collarettes In Rhizopus

The answer is d. (Levinson, p 295.) Cryptococcus neoformans causes cryptococcosis, especially cryptococcal meningitis. The organisms can be seen in cerebrospinal fluid (CSF) in india ink preparations as an oval budding yeast surrounded by a wide, unstained polysaccharide capsule. Candida albicans, the most important species of Candida, causes thrush and vaginitis, as well as other diseases. It may appear in tissue as a budding yeast or as elongated pseudohyphae (nonseptate). Sporothrix...

Questions 9296

Assume you are asked by a resident what the most appropriate specimen is for the detection of a particular virus. 92. Human papillomavirus a. Cervical tissue 92. Human papillomavirus a. Cervical tissue 97. Which of the following is transmitted by the fecal-oral route can be acquired from shellfish and often causes acute jaundice, diarrhea, and liver function abnormalities 98. Which of the following is the second most common cause of pediatric gastroenteritis Unlike other similar viruses, this...

Info

The latest and most effective therapy for AIDS patients includes azi-dothymidine (AZT), dideoxyinosine (DDI), and saquinavir or similar agents. Use of these three drugs would inhibit which of the following viral processes e. Reverse transcriptase, protease 5. An HIV-positive patient prior to being treated with AZT, DDI, and saquinavir has a CD4 lymphocyte count and an HIV RNA viral load test done. Results are as follows CD4 50 CD4 lymphocytes per microliter HIV RNA 750,000 copies per ml Which...

Questions 161164

A new latex agglutination (LA) reagent for H. influenzae polysaccharide antigen in cerebrospinal fluid was evaluated. Results were compared with the isolation of H. influenzae from the CSF. Results were as follows LA POS, CULT POS 25 LA POS, CULT NEG 5 LA NEG, CULT POS 5 LA NEG, CULT NEG 95 163. The negative predictive value of LA is 164. The incidence of H. influenzae meningitis in the general population is less than 1 . If during an epidemic the incidence rose to 3 , the negative predictive...

The Best Describes The Presence Of Histoplasma Capsulatum

The object designated by the arrow in the photomicrograph below is 324. A 6-year-old girl presents to the clinic with scaly patches on the scalp. Primary smears and culture of the skin and hair were negative. A few weeks later, she returned and was found to have inflammatory lesions. The hair fluoresced under Wood's light and primary smears of skin and hair contained septate hyphae. On speaking with the parents, it was discovered that there were several pets in the household. Which of the...

Questions 208211

In order to recognize abnormal bacteria, it is necessary to know which bacteria are predominant normal flora of certain body sites. 208. Which of the following is the predominant organism on skin commonly seen as a blood culture contaminant 209. Which of the following is the predominant flora of the mouth that is the major cause of dental caries 210. The bowel contains many microorganisms but the most prevalent bacterium is 211. Which of the following is the most prevalent microorganism in the...