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How do you best sample a population in a school for infection?

How do you best sample a population in a school for infection?

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There are various and simple methods for diagnostics of infection which can be implemented in school for larger population
Following are below -
Blood tests - One of the simple method dor detection of infection where techician uses a sample of blood by obtainning blood by inserting a syringe with sterile needle into a vein from pheripheral blood.Blood samples are send in lab for detection of infection.
Throat swabs - Sterile swabs are used to swabs from thoart as well as moist body parts from the body.
Urine Tests - It is a painless test which requires a patient to urinate in a container.Also it is instructed by doctors to clean the genital areas by using antisepticpad or cotton before collecting urine blood.

Above samples are send in labs for diagnosis of infection via microbial techniques,

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