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The Wiener Laboratory enzyme-linked Immunosorbent assay (ELISA) recombinante V. 3.0 test system is a manual and automated instrument assay for the qualitative detection of total antibodies (IgG and IgM) to Trypanosoma cruzi in human serum and plasma (EDTA, heparin, or Citrate) using recombinant antigens of T. cruzi. Reactive results are presumptive evidence of present or past infection with Trypanosoma cruzi.

In this qualitative technique for the detection of antibodies anti-T. Cruzi, the sample is diluted in the wells in which recombinant antigens starting from specific proteins from the epimastigote and trypomastigote stages of the T. cruzi corresponding to highly conserved zones are immobilized. These antigens are proteins with aminoacid sequences repeated in tandem. SAPA (shed acute phase antigen) antigens detect antibodies in 93% of the patients' sera during the acute phase of the infection. It comes from the trypomastigote-bloodstream form of the parasite; #1, #2 and #30 antigens detect antibodies in chronic patients; #13 and #36 specially detect antibodies in sera both from acute and chronic patients. If the sample contains Chagas' antibodies, they bind to the antigens bound to the support. The unbound antigens and antibodies are removed by washing, after which anti-human immunoglobulin antibodies conjugated to peroxidase are added. If a reaction was produced in the first step of the process, the conjugate is bound. After a new washing step and the addition of a chromogenic substrate and stopping reagent, specimens containing antibodies to T. cruzi produce a color reaction which can be read with a standard ELISA plate reader.

For the quantitative calibration of WIENER LAB's clinical chemistry procedures. Calibrador A plus is a device intended for medical purposes for use in a test system to establish points of reference that are used in the determination of values in the measurement of substances in human specimens.

Calibrador A plus consists of Ivophilized human serum containing the compounds usually determined in clinical chemistry laboratories in the appropriate concentrations to ensure optimum calibration of clinical chemistry procedures. Such concentrations are lot-specific and are provided in product insert.

The WIENER LAB. Colinesterasa AA test system is a quantitative in vitro diagnostic device intended to be used in the quantitative determination of cholinesterase (an enzyme that catalyzes the hydrolysis of acetylcholine to choline) in human specimens, on both manual and automated systems. There are two principal types of cholinesterase in human tissues. True cholinesterase is present at nerve endings and in erythrocytes (red blood cells) but is not present in plasma. Pseudo cholinesterase is present in plasma and liver but is not present in erythrocytes. Measurements obtained by this device are used in the diagnosis and treatment of cholinesterase inhibition disorders (e.g., insecticide poisoning and succinylcholine poisoning).

Kinetic Method. The principle is based on the following reaction system: Cholinesterase Butyrylthiocholine + H2O -> Thiocholine + Butyrate Thiocholine + DTNB -> 2-Nitro-5-Mercapto-benzoate The cholinesterase activity is determined by measuring the rate of absorbance change at 405 nm. DTNB: 5,5'-Dithiobis-2-Nitrobenzoic Acid. ChE: serum or plasma cholinesterase.

The "Wiener lab. Bilirrubina directa AA" test system is a quantitative in vitro diagnostic device intended to be used in the determination of direct bilirubin in human sera and heparinized plasmas on both manual and automated systems. Measurements of the levels of bilirubin, and organic compound formed during the normal and abnormal destruction of red blood cells, are used in the diagnosis and treatment of liver. hemolytic, hematological, and metabolic disorders, including hepatitis and gall bladder block.

Direct bilirubin is measured using a stable dichlorophenyldiazonium salt (DPD) to form a red azocompound in an acid solution, with maximal O.D. at 546 nm. The amount of direct bilirubin is determined by measuring the absorbance of this pigment.

The "Wiener lab. CK-MB DS UV unitest" test system is a quantitative in vitro diagnostic device intended to measure the activity of the MB isoenzyme of creatine phosphokinase in plasma and serum. Measurements of creatine phosphokinase and its isoenzymes are used in the diagnosis and treatment of myocardial infarction and muscle diseases such as progressive, Duchenne-type muscular dystrophy.

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The Wiener lab. Uricostat enzimático AA Líquida. test system is a quantitative in vitro diagnostic device intended to be used in the determination of uric acid in human sera and heparinized plasmas on both manual and automated systems. Measurements of serum uric acid, are used in the diagnosis and treatment of numerous renal and metabolic disorders, including renal failure, gout, leukemia, psoriasis, starvation or other wasting conditions and of patients under treatment with cytotoxic drugs.

End point method. The principle is based on the following reaction system: UOD Uric Acid + 2 H2O + O2- -> Allantoin + H2O2 + CO2 POD 2 H2O2 + 4-AP + 3,5-SDH ------------------------------------------------------------------------------------------------------------------------------------------------------ The amount of uric acid is determined by measuring the absorbance of this pigment. UOD: Uricase; POD: Peroxidase; 4-AP: 4-Aminophenazone; 3,5-DHS: 3,5-dichlorohydroxybenzenesulfonic acid, sodium salt.

The WIENER LAB. GOT (AST) UV AA Líquida test system is a quantitative in vitro diagnostic device intended to be used in the quantitative determination of aspartate amino transferase (AST or GOT) in human serum and plasma on both manual and automated systems. Aspartate amino transferase measurements are used in the diagnosis and treatment of certain types of liver and heart diseases.

Kinetic Method. The principle is based on the following reaction system: GOT (AST) L-aspartate + 2-oxoglutarate → Oxaloacetate + L-glutamate MDH Oxalacetate + NADH + H + → L-Malate + NAD + The rate of disappearance of NADH and the resulting decrease in absorbance at 340 nm is directly proportional to the activity of GOT (AST). AST or GOT: Aspartate Aminotransferase. MDH: Malate Dehydrogenase. NADH: Nicotinamide-Adenine Dinucleotide (Reduced) NAD + : Nicotinamide-Adenine Dinucleotide. H + : Proton.

The "Wiener lab. Bilirrubina Total AA" test system is a quantitative in vitro diagnostic device intended to be used in the quantitative determination of total bilirubin in human sera and heparinized plasmas on both manual and automated systems. Measurements of the levels of bilirubin, an organic compound formed during the normal and abnormal destruction of red blood cells, are used in the diagnosis and treatment of liver, hemolytic, hematological, and metabolic disorders, including hepatitis and gall bladder block.

Total bilirubin (both conjugated and free) is measured using a stable dichlorophenyl diazonium salt (DPD) to form an azobilirubin compound with maximal O.D. at 546 nm. Surfactants are used as reaction accelerators. The amount of bilirubin is determined by measuring the absorbance of this pigment.

The "Wiener lab. Ca-Color Arsenazo III AA" test system is a quantitative in vitro diagnostic device intended to be used in the quantitative determination of calcium in human sera, heparinized plasmas and urine on both manual and automated systems. Measurements of calcium are used in the diagnosis and treatment of parathyroid diseases, a variety of bone diseases, chronic renal diseases and tetany (intermittent muscular contractions or spasms).

Calcium reacts with Arsenazo III, yielding a blue colored complex, which is photocolorimetrically measured at 650 nm. 8-hydroxyquinoline is added to remove magnesium interference.