HVA and DOPAC are the major metabolites of dopamine.

Dihydroxyphenylpropionic Acid (DHPPA), also known as 3,4 dihydroxyphenylpropionic acid, is a byproduct of the fermentation of dietary phenols by several bacteria, including some Clostridia spp. and others. Although once thought to identify the presence of specific dysbiotic bacteria, ongoing research suggests there are several bacterial species potentially involved.

Produced when Clostridia acts upon unabsorbed tryptophan, tyrosine or phenylalanine.

Dilute Russell's viper venom time (dRVVT) is a laboratory test often used for detection of lupus anticoagulant (LA). Russell's viper venom [RVV] isolated from the snake Daboia russelii contains a potent activator of factor X which in the presence of phospholipid, prothrombin and calcium ions clots fibrinogen to fibrin. In individuals with a lupus anticoagulant the antibody binds to the phospholipid inhibiting the action of the RVV and prolonging the clotting time. 

Organophosphates are one of the most toxic groups of substances in the world, primarily found in pesticide formulations. They are inhibitors of cholinesterase enzymes, leading to overstimulation of nerve cells, causing sweating, salivation, diarrhea, abnormal behavior, including aggression and depression. Children exposed to organophosphates have more than twice the risk of developing pervasive developmental disorder (PDD), an autism spectrum disorder. Maternal organophosphate exposure has been associated with various adverse outcomes including having shorter pregnancies and children with impaired reflexes.

The amino acid derivative dimethylglycine (DMG) is produced when betaine (trimethylglycine) donates a methyl group to homocysteine for re-methylation back to methionine. This methyl donation is mediated by the enzyme betaine homocysteine methyltransferase (BHMT). Elevations in DMG act as a negative feedback by inhibiting this enzymatic conversion. [L]

Organophosphates are one of the most toxic groups of substances in the world, primarily found in pesticide formulations. They are inhibitors of cholinesterase enzymes, leading to overstimulation of nerve cells, causing sweating, salivation, diarrhea, abnormal behavior, including aggression and depression. Children exposed to organophosphates have more than twice the risk of developing pervasive developmental disorder (PDD), an autism spectrum disorder. Maternal organophosphate exposure has been associated with various adverse outcomes including having shorter pregnancies and children with impaired reflexes.

Organophosphates are one of the most toxic groups of substances in the world, primarily found in pesticide formulations. They are inhibitors of cholinesterase enzymes, leading to overstimulation of nerve cells, causing sweating, salivation, diarrhea, abnormal behavior, including aggression and depression. Children exposed to organophosphates have more than twice the risk of developing pervasive developmental disorder (PDD), an autism spectrum disorder. Maternal organophosphate exposure has been associated with various adverse outcomes including having shorter pregnancies and children with impaired reflexes.

Dimethylthiophosphate (DMTP) is a metabolite of organophosphates, which are among the most common causes of poisoning worldwide. Organophosphates are frequently used as pesticides and can enter the body through the lungs, skin, or by consuming contaminated food.

Even at low exposure levels, organophosphates may pose a serious risk to the nervous system, especially for foetuses and young children. Repeated or prolonged exposure may lead to a range of neurological symptoms, including:

• Impaired memory and concentration
• Disorientation and confusion
• Severe depression and irritability
• Headache and speech difficulties
• Delayed reaction times
• Sleep disturbances (such as nightmares, sleepwalking, drowsiness, or insomnia)

Diphenyl phosphate (DPP) is a metabolite produced from exposure to triphenyl phosphate (TPHP), a chemical commonly used as a flame retardant in consumer products like furniture, electronics, and textiles. It is also found in personal care products such as nail polish and cosmetics, where it can be absorbed through the skin. In addition to dermal exposure, DPP can be inhaled when released into the air from products or during manufacturing processes. Another potential route of exposure is through food and beverages, due to migration from packaging materials or contamination during food processing.

DPP is a metabolite of triphenyl phosphate (TPHP), which is used as plasticizer and a fire retardant for a variety of materials including electronic equipment, PVC, hydraulic fluids, glues, nail polishes, and casting resins. TPHP exhibits low acute toxicity by dermal or oral contact. Long-term exposure to TPHP has been linked with reproductive and developmental toxicity, neurotoxicity, metabolic disruption, endocrine effects, and genotoxicity.

This is a metabolite of the organophosphate flame retardant triphenyl phosphate (TPHP), which is used in plastics, electronic equipment, nail polish, and resins. TPHP can cause endocrine disruption. Studies have also linked TPHP to reproductive and developmental problems.

Diphtheria is a contagious and potentially fatal disease caused by a bacterium called Corynebacterium diphtheria. Testing for the antibodies against the disease gives doctors an idea if you have immunity towards diphtheria.

Diphtheria antitoxoid antibodies are specific immunoglobulins (also known as antibodies) produced by the human immune system in response to the diphtheria toxoid vaccine or exposure to the bacterium Corynebacterium diphtheriae, which causes diphtheria.

What is Diphtheria?

Diphtheria is a serious bacterial infection that can lead to difficulty breathing, heart rhythm problems, and even death. It's caused by strains of bacteria called Corynebacterium diphtheriae that make toxin. Diphtheria spreads easily and happens quickly, and mainly affects the nose and throat. It's spread from person to person, usually through respiratory droplets, from coughing or sneezing.