Tuberculosis examination should be fasting?

The physical examination of tuberculosis, if simple examination sputum or x-ray, generally do not need fasting, if want other kind of examination is to want fasting, generally before the examination, may need to do liver and kidney function examination, blood routine or chest and abdomen color ultrasound these examinations, if need to do the examination is to need fasting, simple examination of tuberculosis, generally after examination tuberculosis bacilli, like sputum smear examination, ppd experiment, or chest ct or x-ray examination, For sputum specimens, smear examination. General accuracy is relatively high, can take the sputum of the lungs to test, like x-ray can also be preliminary to determine whether there is tuberculosis focus.