Chlamydia, caused by the bacterium Chlamydia trachomatis, is one of the most prevalent sexually transmitted infections (STIs) worldwide. It primarily affects the genital tract, but can also impact the rectum, throat, and eyes. One of the key challenges in controlling Chlamydia is its often asymptomatic nature; a significant proportion of infected individuals exhibit no noticeable symptoms, thereby unknowingly facilitating its spread. When symptoms do occur, they can include genital discharge, burning during urination, lower abdominal pain, painful sexual intercourse for women, and testicular pain in men.

Chlamydias are obligate intracellular pathogens. Chlamydia pneumoniae (C. pneumoniae) is a human pathogen that infects the respiratory tract and is responsible for some cases of communityacquired pneumonia.

Chloride, as measured in a random urine sample is essential for evaluating the body's electrolyte balance and acid-base status, as chloride is a major anion (negatively charged ion) found in the blood and urine. In this test, chloride levels are assessed alongside creatinine, a waste product produced by muscle metabolism, which serves as a reference to help interpret the chloride results more accurately. By comparing the amount of chloride to creatinine in the urine, healthcare providers can gain insights into the kidney's ability to filter and reabsorb essential minerals. This is particularly important in diagnosing and managing conditions related to electrolyte imbalances, dehydration, and kidney function.

Chloride is a molecule found in the body and belongs to the electrolyte group, indicating that it possesses an electrical charge. Electrolytes work to maintain the pH of our body fluids, help our cells to keep the amount of fluid inside and outside the cell balanced, and aid in the maintenance of proper blood volume / blood pressure. Tests for chloride, sodium, potassium, and bicarbonate are typically done together as part of an electrolyte panel, a basic metabolic panel, or a comprehensive metabolic panel. A healthcare professional may order an electrolyte panel when symptoms such as prolonged vomiting, diarrhea, weakness, and difficulty breathing are present. An electrolyte panel can also be used to determine the cause of a pH level in the blood that is too acidic or too alkaline. Additionally, electrolyte panels may be done routinely to monitor medications or diseases that are known to cause electrolyte imbalance. Chloride can be measured through blood or urine. 

Chloride is the most abundant ion outside of cells. It is important for maintaining osmotic pressure, nerve cell function, and fluid balance. The urine chloride test is used primarily in cases of suspected metabolic alkalosis.

Your total cholesterol score is calculated using the following equation: HDL + LDL + 20 percent of your triglyceride level.

With HDL cholesterol, higher levels are better. Low HDL cholesterol puts you at a higher risk for heart disease. With LDL cholesterol, lower levels are better. High LDL cholesterol puts you at a higher risk for heart disease.

The Cholesterol Balance Score, a key marker on the Boston Heart Cholesterol Balance® test, provides a comprehensive assessment of an individual's cholesterol metabolism by evaluating the ratio of cholesterol production to absorption. This score is derived from the direct measurement of lathosterol and desmosterol (cholesterol production markers) and beta-sitosterol, campesterol, and cholestanol (cholesterol absorption markers). By offering insights into both production and absorption pathways, the Cholesterol Balance Score helps clinicians understand the underlying causes of dyslipidemia and tailor treatment strategies more effectively. This personalized approach can enhance the management of cardiovascular disease risk and improve patient outcomes by precisely targeting LDL-C lowering therapies.

Cholic acid (CA), Chenodeoxycholic acid (CDCA), Deoxycholic acid (DCA), Lithocholic acid (LCA) are the major bile acids related to gut microbiome.

Bile Acids are natural products of cholesterol synthesis that aid in the emulsification and absorption of dietary fats in the small intestine. Elevated total fecal bile acid is indicative of a diagnosis of bile acid malabsorption. Quantification of fecal bile acids aids in diagnosis for IBS and identification of patients with chronic diarrhea who may benefit from bile acid sequestrant therapy. There is a connection between the liver health, fecal bile acid concentrations, and gut microbiota composition. Bile acids have both direct antimicrobial effects on gut microbes and indirect effects through FXR-induced antimicrobial peptides.

Choline is an essential nutrient that is part of cell membranes and is used by nerves to send impulses. Choline is known to be essential for mammals, and is essential for human cell growth. A dietary requirement for choline in humans has not been proven, although recent data on infants and dietary choline depletion in adults suggests that choline is an essential nutrient. Historically, choline is considered as a lipotrope and member of the B vitamin complex.

Choline has several distinct functions. First, choline serves as a source of one-carbon units (methyl groups) for biosynthesis of other compounds. Interactions with methionine, Vitamin B12, folate, ethanolamine, and betaine allow choline to partially replace, or be replaced by other constituents in one-carbon metabolism. Second, choline is a component of phosphatidyl choline, the major component of cell membranes. Lecithin is a commercial name for phospholipids containing 10-35% phosphatidyl choline. Phosphatidyl choline has interactions with cholesterol and lipoprotein metabolism.

Choline is a nutrient that supports various bodily functions, including cellular growth and metabolism. The body makes some choline, but the majority comes from dietary sources.

Choline is an essential nutrient involved in various physiological processes, including cell membrane structure, lipid metabolism, and neurotransmitter synthesis. When measured in a urine sample as choline (mg/g creatinine), this biomarker can provide valuable insights into an individual's choline status and overall metabolic health. The measurement of choline in urine is often normalized to creatinine levels to account for variations in urine concentration, making the value more reliable and comparable across different samples and individuals. Interpreting choline levels in urine requires considering dietary intake, as choline is obtained from foods such as eggs, meat, fish, and certain vegetables.

Physiological Function:

Choline is metabolized within cellular mitochondria resulting in production of trimethylglycine; TMG plays a role in supporting methyl donation processes either directly (methylating homocysteine) or indirectly through supporting production of S-adenosyl methionine (SAMe). Choline is converted into acetylcholine (ACh).

Common food sources:

Beef liver, eggs, soybeans, scallops, chicken breast

Serum cholinesterase is a blood test that looks at levels of 2 substances that help the nervous system work properly. They are called acetylcholinesterase and pseudocholinesterase. Your nerves need these substances to send signals.

Acetylcholinesterase is found in nerve tissue and red blood cells. Pseudocholinesterase is found primarily in the liver.

Serum cholinesterase, also known as pseudocholinesterase (PCHE), is a type of cholinesterase found in the blood that plays a crucial role in the breakdown of certain chemicals, including acetylcholine. It is distinct from acetylcholinesterase, found at nerve endings, and it has a different substrate specificity.

Serum cholinesterase is often measured through blood tests and is utilized as a biomarker for various health conditions, particularly those related to the liver's synthetic function.

Abnormal levels of serum cholinesterase can be indicative of liver dysfunction and can be monitored for acute poisoning detection. Its measurements are valuable in assessing liver function and overall health.

Typically, normal pseudocholinesterase values range between 8 and 18 units per milliliter (U/mL) or 8 and 18 kilounits per liter (kU/L).

Note: Normal value ranges may vary slightly among different laboratories. Talk to your provider about the meaning of your specific test results.

Help to diagnose drug-induced lupus (DIL) and systemic lupus erythematosus (SLE). Antibodies to both chromatin and histones have been found in patients with procainamide-induced lupus; however, patients with lupus induced by drugs such as quinidine, penicillamine, methyldopa, and acebutolol have antibodies to chromatin but not antihistone. Antichromatin antibodies are found in 50% to 90% of SLE patients and have been linked with proteinuria in SLE patients.

Antichromatin antibodies are more sensitive than anti-dsDNA antibodies in detecting active SLE.