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The methylene blue sulfide test is a convenient method often used in soil microbiology to quickly detect in water the metabolic activity of sulfate reducing bacteria (SRB). In this colorimetric test, methylene blue is a product formed by the reaction and not a reagent added to the system. [62]
For this test, the patient takes oral phenazopyridine (Pyridium) 200 mg three times a day, and indigo carmine or methylene blue is filled into the empty urinary bladder via a urethral catheter. Pyridium turns urine orange in the kidneys, and methylene blue (or indigo carmine) turns urine blue in the bladder. [1] A tampon is placed into the ...
A spectrum of abnormal colors can result from the intake of drugs. An unusually bright yellow color can occur after consumption of B vitamin supplements, [31] while phenazopyridine, used to treat urinary tract-related pain, can turn the urine orange. Methylene blue may turn it blue to bluish-green. [32]
Wright's stain is a hematologic stain that facilitates the differentiation of blood cell types. It is classically a mixture of eosin (red) and methylene blue dyes. It is used primarily to stain peripheral blood smears, urine samples, and bone marrow aspirates, which are examined under a light microscope.
Rumours of the origin of urine indicator-dye go back at least as far as 1958, [1] and the story is commonly told to children by parents who do not want them to urinate in the pool. [3] A 1985 biography of Orson Welles describes him using such a dye as part of a prank in 1937.
These reported symptoms vary from blue discoloration of body fluids to anaphylactic shock. [10] Methemoglobinemia is a blood disorder that can potentially result in various levels of cyanosis. [11] High levels of methylene blue dye can also result in hemolysis.
Eosin methylene blue (EMB, also known as "Levine's formulation") is a selective and differential media used for the identification of Gram-negative bacteria, [1] specifically the Enterobacteriaceae. EMB inhibits the growth of most Gram-positive bacteria. EMB is often used to confirm the presence of coliforms in a sample.
After incubation, methylene blue is added. If anti-Toxo antibodies are present in the serum, the antibody-antigen complex activates complement to lyse the parasite membrane, Toxoplasma trophozoites are not stained (positive result); if there are no antibodies, trophozoites with intact membrane are stained and appear blue under microscope ...