 [ Symptoms ] will heroin show up during fertility blood work i am having cycle day 3 blood work prenatial pannel and genetics i do not usually do drugs and of course i did right before my period and now i have to get bloodwork done will my doctor be able to tell will they test for drugs [ Disease ] avoid getting active tb active tuberculosis tb is an infection that is spreading in a person is body and it is very contagious the world health organization who estimates that one third of the world is population is infected with the bacteria that causes tb to avoid getting an active tb infection do not spend long periods of time in stuffy enclosed rooms with anyone who has active tb until that person has been treated for at least 2 weeks use protective measures such as face masks if you work in a facility that cares for people who have untreated tb if you live with someone who has active tb help and encourage the person to follow treatment instructions prevent latent tb from becoming active usually treatment with isoniazid for about 9 months or rifampin for 4 months can prevent a latent tb infection from developing into active tb treatment is recommended for anyone with a skin test that shows a tb infection and is especially important for people who are known to or are likely to be infected with the human immunodeficiency virus hiv have close contact with a person who has active tb have a chest x ray that suggests a tb infection and have not had a complete course of treatment inject illegal drugs have a medical condition or take medicines that weaken the immune system have had a tuberculin skin test within the past 2 years that did not show a tb infection but now a new test indicates an infection can the tb vaccine help a tb vaccine  bacille calmette guerin or bcg is used in many countries to prevent tb but this vaccination is almost never used in the united states because the risk of getting tb is low in the u s the vaccine is not effective in adults who receive it the bcg vaccine may cause a tuberculin skin test to indicate a tb infection even if a person is not infected with tb this complicates the use of the tuberculin skin test to check people for tb webmd medical reference from healthwise this information is not intended to replace the advice of a doctor healthwise disclaims any liability for the decisions you make based on this information © 1995 2011 healthwise incorporated healthwise healthwise for every health decision and the healthwise logo are trademarks of healthwise incorporated