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Yes, it does need an article. Without further context, the indefinite sounds better to me:
Necessary medical tests for a complete examination are arranged, taking into account harmful factors and unfavorable working condidions for every employee.
Yes, it does need an article. Without further context, the indefinite sounds better to me:
Necessary medical tests for a complete examination are arranged, taking into account harmful factors and unfavorable working condidions for every employee.
arranged taking in account 
Linear Mode
