Acid is used to dec… ", Maryland Department of Health: "AFP Testing for Improved Pregnancy Outcome. Learn more. Sometimes you can get a false positive. You may need to talk to a genetic counselor, who can help you understand your results and answer your questions. One of the next steps might be to see if there's AFP in the fluid around your baby with a test called amniocentesis. Procedure for AFB, Smear Test. The fluids can be water, tea, coffee, etc. The inclusion of fluids helps your body to create more sputum and the night before the test will do the same. You may feel a small skin prick and have a little bruising or bleeding where the needle goes in. ", UpToDate: "Open neural tube defects: Risk factors, prenatal screening and diagnosis, and pregnancy management.". A positive test with a high AFP suggests a birth defect like spina bifida. All rights reserved. The phenolic compound carbol fuchsin is used as the primary stain because it is lipid soluble and penetrates the waxy cell wall. A genetic counselor can help you decide. Acid-fast bacillus (AFB) is a type of bacteria that causes tuberculosis (TB) and other infections. That means the test says something's wrong when it's not. Detection of acid-fast bacilli (AFB) in stained and acid-washed smears examined microscopically may provide the initial bacteriologic evidence of the presence of mycobacteria in a … Talk to a specialist about what you can expect and what your options are so you can make the best choices for your family. Your baby may make more AFP than normal, or you could be having twins (two babies make more AFP than one). A positive test with low AFP could mean a problem like Down syndrome or Edwards syndrome. A negative or normal test usually means your baby oeds not have genetic abnormalities. Checking the level of AFP in a mom-to-be can show if her baby may have problems with their neural tube, what will become the brain and spinal cord. Other things, including your race, weight, and having diabetes, can also affect your result. Don't worry if your test isn't normal. Your doctor will probably want to double-check your results. You can choose to get an AFP test or not. Unborn babies normally make alpha-fetoprotein (AFP), and it shows up in their mother's blood. A technician uses a needle to take a small sample of blood from a vein in your hand or arm. Top Treatment Tips, Slideshow: Conception Timeline -- From Egg to Embryo, Slideshow: Fetal Development Month by Month, Prenatal Tests You Need for Your Baby's Health, Ovulation Tool: Find Your Most Fertile Days. An AFB culture can confirm a diagnosis, but results take 6–8 weeks. Organisms such as Mycobacteria are extremely difficult to stain by ordinary methods like Gram Stain because of the high lipid content of the cell wall. When your AFP is too high or low, you can have more tests to find out why. An AFB smear test gives results in 1–2 days but can't confirm a diagnosis. Staining by carbol fuchsin is further enhanced by steam heating the preparation to melt the wax and allow the stain to move into the cell. © 2005 - 2019 WebMD LLC. If your baby might be born too early, your doctor will watch you closely. AFP only tells you there's a chance for a problem, not that there is one.

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