Certain alleles may cause serious diseases in a given environment but they may also be beneficial in different environmental conditions. It is a principle of natural selection.
<h3>Natural selection and alleles</h3>
Natural selection refers to the differential survival and reproduction of an organism in a given environment.
Certain alleles such as the allele of sickle cell disease show an evolutionary advantage in specific environmental conditions.
This allele is lethal in homo-zygous individuals, thereby tending to be eliminated from the population.
However, in regions where malaria is endemic, the presence of carriers individual having the sickle cell allele is advantageous to prevent this disease.
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Stop the treatment immediately, if the medication given needs antagonist to counteract it's effects, then it should be given. reassess the diagnosis and exclude all the differential diagnosis. conduct investigations relevant to the histories including serological test, chest CT and MRi. inform the patient the situation (if he is awake) and make sure the next treatment is the best after arriving to the correct diagnosis.
kidney - removes urine from the body by making urine
urethra - leads urine from the body
bladder - stores urine until it is ready to be released
ureter - leads urine away from the body
