1. A 19-year-old female visits the clinic complaining of a frequent, urgent desire to urinate, a burning sensation during urination, and pain above her pubic bone. The physician suspects cystitis and arranges for the patient to collect a clean-catch, mid-stream urine specimen. The urine is cloudy and tinged with blood. In the laboratory, a colony count confirms that the patient does have a urinary tract infection. The pathogen causing the infection is producing pink colonies on MacConkey agar. Which one of the following pathogens do you suspect is causing this patient鈥檚 cystitis?
a. Chlamydia trachomatis
b. Escherichia coli
c. Neisseria gonorrhoeae
d. Proteus mirabilis
e. Staphylococcus saprophyticus
2. A 2-year-old girl is admitted to the hospital with massive tissue destruction along her right arm. The skin is a violet color and large fluid-filled blisters are present. The patient has a fever, a rapid heart rate, low blood pressure, and seems confused. Her mother informs the physician that the child had been recovering from chickenpox, and, for the past two days, had frequently been scratching at chickenpox lesions on that area of her arm. Once the area appeared to have become infected, the infection spread very rapidly. A Gram-stain of exudate from the infected tissue reveals Gram-positive cocci in chains. The physician suspects that her infection is being caused by _______________.
a. Clostridium perfringens
b. Clostridium tetani
c. Staphylococcus aureus
d. Streptococcus pneumoniae
e. Streptococcus pyogenes (Group A strep)
3. A 16-year-old female is admitted to the hospital with severe abdominal cramps and bloody diarrhea. She has a fever of 102oF. She has been experiencing her symptoms for the past three days, since several hours after eating at a fast food restaurant with a group of her friends. She recalls that the hamburger she ate was not very well cooked. (It is later learned that the meat being used in that restaurant to prepare hamburgers has been recalled due to bacterial contamination.) All of the following organisms can cause diarrhea, but which is the most likely cause of her illness?
a. A species of Salmonella
b. A species of Shigella
c. Escherichia coli O157:H7
d. Staphylococcus aureus
e. Vibrio cholerae
4. A 20-year-old male is admitted to the hospital with fever, headache, stiff neck, sore throat, and vomiting. The attending physician suspects that the patient has meningitis and immediately performs a lumbar puncture. A cerebrospinal fluid (CSF) specimen is rushed to the laboratory, where it is processed immediately. After centrifuging an aliquot of the specimen, the sediment is spread onto a microscope slide, fixed, and Gram-stained. Microscopic examination of the Gram-stained specimen reveals numerous white blood cells and numerous Gram-negative diplococci. This information is telephoned to the attending physician, who will now treat the patient for a meningitis caused by _______________.
a. Haemophilus influenzae
b. Neisseria meningitidis
c. Streptococcus agalactiae (Group B strep)
d. Streptococcus pneumoniae
e. Streptococcus pyogenes (Group A strep)
5. An 80-year-old female is transferred from a nursing home to the hospital because she is suspected of having pneumonia. She is experiencing chest pain, chills, fever, and shortness of breath. She has a productive cough (meaning that she is coughing up sputum). A Gram-stain of the sputum reveals numerous white blood cells and numerous Gram-positive diplococci. Upon receipt of the Gram-stain report, the physician treats the patient for a pneumonia caused by _______________.
a. Haemophilus influenzae
b. Staphylococcus aureus
c. Streptococcus agalactiae (Group B strep)
d. Streptococcus pneumoniae
e. Streptococcus pyogenes (Group A strep) Please also include why the rest of the choice doesn't match with the conditional stats. Ok, I had not intended to answer this question because you need to do your own work. But, there are some incorrect answers from "abcdefg". They may be purposely giving wrong answers but too many people read these anwsers and believe them to all be true.
Number two: Correct answer is e. Streptococcus pyogenes (Group A strep). Group A strep is seen in chains on a gram stain. Staph. aureus appears in grape-like clusters an a gram stain. Streptococcus pyogenes, Group A strep, is a common cause of Necrotizing Fasciitis which these symptoms match.
Number four: Correct answer is b. Neisseria meningitidis. Streptococcus pneumonia appears as lanceolate gram positive cocci in pairs on a gram stain. Neiserria meningitidis is the ONLY gram-negative cocci given as a choice. It also happens to be the primary cause of bacterial meningitis.
Number five: Correct answer is d.Streptococcus pneumoniae. Streptococcus pneumoniae is the primary cause of bacterial pneumonia. Strep. pyogenes would appear in chains on a gram stain while Strep. pneumoniae appears as pairs of diplococci.
I do hope you decide to spend some time doing your next assignment alone. Employers will not give you this courtesy. And, your co-workers will be angry. Life is not a free ride. Don't expect one. The old saying, "life is tough, get over it", is very true. Do your own work. er..........
1. b
2. c
3.c
4.d
5.e
Yeah, that's it, but you seriously need to do your own homework. I spent four years in med school, I worked sometimes all night then, went to school at five in the A.M. so I could get lab time in. I aced all my tests of which Microbiology and hematology are the hardest. I suggest you do your own work. When your in that big lab your working for, no ones going to help you there and, there are people you can kill with the wrong diagnosis. |
