inoculating a sample from the tube onto an agar plate. (See Fig. 10.4) Question
ID: 202815 • Letter: I
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inoculating a sample from the tube onto an agar plate. (See Fig. 10.4) Question 2 (if available) and discuss which of them are more infectious method and why one form of transmission is more effective than the other. Make a group of two or three Question 3 In a village of 100,000 population, among 20,000 exposed to an oncogenic virus (e.g. HTLV-1, HBv) cancer. The relative risk of 200 developed cancer, and among 40,000 pcople unexposed, 40 developed infection in the development of cancer is: A.20, B.10, ©5, D.15 Section C: Specimen-Handling Protocols The proper collection and processing of laboratory specimens is an integral part of hospital procedures. If the laboratory receives an incorrectly collected and processed specimen for analysis, correct patient care may be jeopardized. A somewhat succinct computer programming term for something similar to this is "Garbage in garbage out." Virtually everyone working in the hospital or clinical setting will collect handle, or transport some type of clinical specimen at one time or another. Therefore, it is imperative tha an understanding of the procedures or protocols involved in these tasks be understood. The be aboratory technologist in the world will not be able to accurately identify an infectious agent from oorly acquired or transported specimen, and it is the patient who will suffer! he following principles apply to most microbiology laboratory specimens: The specimen must be collected before starting antimicrobial therapy. (Streptococcus pyoge often does not show up in throat cultures as little as 2 hours after the start of antimicrobial therapy A specimen must be representative of the condition; for example, a sputum sample is n appropriate for testing for pneumonia, whereas saliva is not. Saliva (spit) is representative of mouth, whereas sputum represents microbes from the lungs. The stage of the disease must be considered. For example, the typhoid fever bacillus is more e isolated from blood during the first week of the disease and from the feces during the third and f week Geography and season are considerations in determining which types of tests are to be perfon Plague is more common in New Mexico than in Alaska, and meningitis is more frequent in theExplanation / Answer
Hi,
Relative risk = (200 / 20000) / (40/40000) = 10
So the cancer chance is 10 times more in people exposed to oncogenic virus.
The most common throat and respiratory infections are caused by streptococci. These have hemolytic abilities and hence are better isolated on blood agar media. The MacConkey agar is the suitable for isolation of gram-ve enteric bacteria. Entric means they are abundant in gastrointestinal tract. Hence this media is used.
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