Bacteria, ABX Master Study Flashcards
(155 cards)
What are bacteria and how big are they?
Prokaryotes, no nucleous, no organelles, infectious, may have toxins, .5 - 5 microns.
What are Protazoa?
Eukaryote, nucleated with organelles, infectious no toxins, 15 - 30 microns. Ex: malaria
What are fungi?
Eukaryote, nucleated with organelles, infectious but might have toxins, 5 - 10 microns. Ex: yeast
What are viruses?
Not in a kingdom, have no cells, a parasite of living cells.015-.1 microns. Ex: smallpox
Relative size of bacteria & viruses?
Limit of vision is 40 - 50 microns. WBC ~ 12-14 microns. RBC ~ 8 microns. Bacteria ~ 1 micron. Limit of light microsope magnification = .2 microns. Virus ~ .015 - .1 microns.
An AIDS patient develops extensive pneumonia and dies a week later. A sample of the lung fluid reveals 5-8 micron cells with a nucleus. The appearance of these cells means the organism is?
an unidentified eukaryote
The urine from a patient with pain under the ribs on the right and mild jaundice (yellow skin and eyes) reveals many long thin coiled cells, without a nucleus. These cells are _____, and he has leptospirosis
spirochetes
The sputum from a patient with difficulty breathing, a fever, fluid in the lungs seen on chest X-ray, and chest pain, reveals many round purple cells in pairs. The bacteria is a
Strep pneumoniae
A vaginal swab from a patient complaining of vaginal burning, itching, and a creamy discharge reveals many large (8-10 micron) oval cells with obvious nuclei. So you know
It can’t be bacteria, it could be yeast, it’s not HIV.
The swab of the throat of a college student with moderate swelling of obviously red tonsils, and many red spots on the soft tissue at the roof of the mouth, and little white abscesses on the tonsils, reveals many round purple cells in chains. A reasonable cause of this might be:
Streptococcus pyogenes
A 50 year old chain-smoking, alcoholic, diabetic, obese male develops an acute pneumonia. The cultures of sputum grow colonies of bacilli and the cells stain pink. They could be
Could be E.coli, klebsiella, Hemophilus, and Leginella
The Gram stained CSF from a [premature] neonatal patient with meningitis reveals small round purple cells in chains. The same bacteria was cultured from the cerebral-spinal fluid.
A reasonable cause of this infection might be
Group B Streptococcus
The amniotic fluid from a pregnant patient who just delivered a still-born infant reveals purple rods. You know it can’t be
Group B Streptococcus
The cervical swab of an 18 year old college student reveals round pink cells in groups of two. A reasonable cause of this might be _____, and she’s wrong when she asks ““it’s just a UTI, right?
Neisseria gonorrhea
The fluid draining from the ruptured eardrum of a 4 year old child reveals small, unpaired, oval-ish
pink cells. Being neither rods, nor spheres, they’re best described as
G- coccobacillus
An college student is seen in the clinic for a 2-month cough, weight loss, and night sweats. The sputum is thick, and sometimes tinged with blood. His sputum is stained a variety of ways, and one is designated ““AFB+””. What disease does he have (probably). ?
tuberculosis
The large blackened ulcer on the forearm of a soldier serving in Bloatedgoatistan reveals large, purple, square-ended rods in chains. The Gram’s stain is consistent with
Bacillus anthracis
A teenager complains of very stiff neck, fever, photosensitivity, vomiting and severe headache.
The CSF reveals a small number of white blood cells, but no other obvious cells.
Assume any cellular infectious agents would be visible. Which of these is incorrect?
the infection is probably due to bacteria less that .2 µM in size
An elderly patient with a post-surgical infection develops pus around the wound site and inflammation. The culture reveals round, G+ cocci in clusters. Which of these is correct?
he has a staph infection
The urine from a female complaining of burning, cloudy urine reveals pink rods. It’s likely to be
E. coli
The genital ulcer of a young adult is Gram stained, but no bacteria are visible. A silver stain reveals
numerous spirochetes, and a fluorescent antibody stain for Treponema is positive. She has?
syphilis
A college-aged female develops persistent vaginal irritation, and a greenish vaginal discharge.
Microscopic examination of a swabbed sample reveals pear shaped cells ~7x10 uM with a nucleus
and Trichomonas protozoa are presumptively identified . Which of the following is incorrect?
the infection could be treated with penicillin
A spherical bacteria that occur in clusters of 4 [and there are many G+ skin bacteria like this),
could be called which of these? (the names are fake!)
Quadracoccus
A rod-shaped bacteria that is multiply curved [but is not a spirochete] causes ulcers; it is?
Helicobacter
