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Persons with beta thalassemia minor rarely have physical signs or symptoms caused by this disorder and usually do not require any treatment. Beta thalassemia minor is most common in Thailand and among the American Black population.

Delta-beta thalassemia exists in both heterozygous and homozygous forms. The symptoms are mild to moderate depending on the severity of the disease.This form of beta thalassemia can be found in many ethnic groups, but is most common in persons from Greece and Italy.

Individuals with diabetes mellitus may excrete small amounts of protein in the urine which may signal the beginning of reduced glomerular filtration. Stabilizing the blood glucose level at this time may delay progression of diabetic nephropathy. Women in the last month of pregnancy may develop proteinuria as the first sign of impending eclampsia. Eclampsia is the gravest form of toxemia of pregnancy. The presence of protein in this situation must be evaluated by the physician in conjunction with other clinical symptoms.Benign transient proteinuria may be the result of: exposure to cold, strenuous exercise, dehydration, and/or high fever. Benign transient proteinuria may also occur during the acute phase of a severe illness.

A screening test for bilirubin in the urine is included in most urine dipsticks and may be present when liver disease or damage is suspected. Bilirubinuria can be detected before other clinical symptoms such as jaundice are present or recognizable. The detection of small quantities is very important in early diagnosis of obstructive and hepatic jaundice. This test is also useful in the differential diagnosis of obstructive jaundice (positive for bilirubinuria) vs. hemolytic jaundice (negative for bilirubinuria).

Kornbluth AA. Danzig JB. Bernstein LH.: Clostridium septicum infection and associated malignancy. Report of 2 cases and review of the literature. Medicine. 68(1):30-7, 1989We report 2 patients with myonecrosis due to Clostridium septicum and associated colon carcinoma and have reviewed the English language literature for all reported cases of atraumatic C. septicum infection. A total of 162 cases of C. septicum infection have been reported.Eighty-one percent of these patients had an associated malignancy. Thirty-four percent of all patients had associated colon carcinoma, while 40% had a hematologic malignancy. Thirty-seven percent of reported patients had an occult malignancy at the time of their infection with C. septicum. In many patients, the portal of entry was found in the large intestine.In a particularly lethal form (79% mortality) of C. septicum infection, known as "distant myonecrosis," infection metastatic from the initial site of infection causes severe myonecrosis, gangrene, and often death within hours of clinical detection. Overall, survival of patients with C. septicum infection is only 35%.Review of all cases of C. septicum infection suggests several conclusions. 1) Patients with malignancy, particularly colonic or hematologic, and patients with cyclic neutropenia who develop signs and symptoms of sepsis, especially with associated findings of abdominal pain or pain in an extremity, should be treated for possible clostridial infection. 2) C. septicum infection does not appear to be a result of a single specific defect in either humoral or cell-mediated immunity. Rather, it may occur in patients who are granulocytopenic and therefore prone to an enterocolitis. 3) Patients in whom an infection with C. septicum is found must undergo a vigorous search for malignancy following ac

A first degree burn involves only the skin's outer layer (the epidermis) and is the least severe.Symptoms are redness, pain, and mild swelling.

Hemophilia B is a deficiency of coagulation factor IX. Found almost exclusively in males, its pattern of inheritance is sex-linked recessive. This disorder presents almost identically to Hemophilia A in terms of symptoms, and has a very similar pattern of inheritance. Be sure to keep in mind that while similar, Hemophilia A and B are caused by a deficiency in different coagulation factors. The treatment of Hemophilia B involves therapeutic administration of Factor IX concentrates.

Hereditary hemochromatosis (HH) is a disorder of iron regulation that results in excessive dietary iron absorption through the gastrointestinal tract. Over time, the resultant iron overload and its deposition in tissue may lead to widespread organ damage, a variety of chronic disorders, and even death. Although it is a genetic disorder, clinical symptoms most typically become apparent in middle aged adults. Iron overload occurs in a variety of hereditary and acquired forms, known as iron storage diseases. HH is the most common cause of inherited iron overload. (1) Due to lack of awareness, HH often goes undetected or unrecognized by health care providers. Early detection to prevent the serious complications associated with iron overload has important consequences for reducing morbidity and mortality. Laboratory tests that assess iron levels and molecular assays for genetic mutatations are essential for both its detection and diagnosis.

Hereditary hemochromatosis (HH) is frequently discovered only during management of associated illness or routine health evaluations. It has been estimated that only a small percentage of all affected persons are actually diagnosed. Individuals with HH may be symptomatic for several years prior to diagnosis and may have consulted multiple health care providers.Under-diagnosis of HH is thought to occur due to:• Lack of specificity of early signs and symptoms• Asymptomatic status of some patients until damage to organs and tissues has occurred• Confusion with liver disease due to other causes• Insufficient awareness and knowledge of HHEarly identification of persons with HH is essential to prevent serious and irreversible complications associated with severe iron overload. A classic triad of skin hyperpigmentation (bronzing), type 2 diabetes, and hepatic cirrhosis has long been recognized as evidence of advanced iron overload. However, persons with HH may present with a much wider variety of signs and symptoms, particularly if they are seen before significant iron accumulation has occurred. Age of presentation and disease severity are highly variable. A diagnosis of HH is based on laboratory evidence of iron overload, genetic mutations associated with HH, and presence of clinical signs and symptoms consistent with HH.(10)

Early signs and symptoms of hereditary hemochromatosis (HH) are vague, nonspecific, and variable. As iron overload progresses (late HH), signs and symptoms become more severe and are related to damage of specific organs.

In addition to hereditary hemochromatosis (HH), there are other conditions of iron overload that must be considered in a differential diagnosis. Disorders such as sickle cell disease, thalassemia, sideroblastic anemia, congenital dyserythropoietic anemia, and liver disease may also cause iron overload. Transfusion-dependant patients and persons who abuse iron-containing vitamin supplements are also at risk. These conditions are usually described as secondary iron overload, in contrast to the primary iron overload of HH.Patient history, clinical signs and symptoms, biochemical and hematologic laboratory analyses, and possibly results of a liver biopsy may be needed to establish a diagnosis of a condition causing secondary iron overload. DNA tests for common HFE mutations are very likely the most important diagnostic tool for identifying HH as the cause of iron overload. In some patients, both secondary causes and HH may be contributing to iron overload. Differentiating the secondary causes of iron overload from HH is heavily dependent on the results of laboratory assays, but a complete discussion is beyond the scope of this course.

DNA tests for HFE mutations associated with hereditary hemochromatosis (HH) are available in some clinical laboratories and reference laboratories. Testing for the presence of the C282Y is essential, although most labs also test for H63D and S65C mutations. Molecular testing is most appropriate for confirmatory testing of symptomatic individuals with altered iron studies (increased TS and SF), in pre-symptomatic individuals (increased TS, normal SF and liver function tests), and in family members of individuals diagnosed with HH. The use of genetic tests alone for routine screening of asymptomatic persons is not recommended for several reasons. A positive test indicating the presence of HFE mutations does not guarantee that an individual will develop clinically significant iron overload or predict severity of symptoms. A negative result (no HFE mutations present) does not rule out a diagnosis of iron overload because of genetic heterogeneity. Compared to biochemical analyses for iron, molecular assays are expensive. Finally, molecular testing may result in the diagnosis of a genetic disease, thus opening up the possibility for discrimination in health insurance coverage. Using molecular methods, DNA is extracted from leukocytes in whole blood samples or from buccal cells and analyzed for specific HFE mutations using polymerase chain reaction (PCR) with melt curve analysis. Currently there are no FDA-cleared products for HFE testing, and testing laboratories are using "home brew" reagents. This situation is expected to change as manufacturers submit products for FDA approval.

Treatment for hereditary hemochromatosis (HH) is typically indicated for iron overload in symptomatic patients. The goal of therapy is to reduce stored iron which may result in reversal or resolution of some symptoms and improve prognosis. Causes of death in patients with HH include serious medical conditions such as hepatocellular carcimoma, cirrhosis, cardiomyopathy, and diabetes. Ideally, treatment should begin before these conditions develop. The earlier HH is detected, before the onset of severe organ damage, the lower the risk of mortality.

Acquired Immunodeficiency syndrome (AIDS) is caused by the Human Immunodeficiency virus (HIV). When HIV enters a person's bloodstream, it attacks and kills the T-helper lymphocytes, which are essential to the body in fighting off infections. As these cells are lost, so is the body's ability to fight infection. Possibly months after the initial infecting episode, an infected person develops a mononucleosis-like illness lasting a week or two. A person may then be free of symptoms for years. But as the T-helper cells die, the person becomes vulnerable to many serious infections. The expected mortality is 100%, and there is no vaccine available to develop specific immunity.

Most likely means of dissemination: As an aerosolPrimary route of entry: InhalationGeneral signs and symptoms: High fever, extreme lethargy, severe headache, severe backache, severe abdominal pain, with a rash that starts as red bumps but quickly develops into small, itchy blisters.   Photo courtesy of the CDC archives.

Most likely means of dissemination: AerosolPrimary route of entry: InhalationGeneral signs and symptoms: High fever, chills, headache, coughing up of blood (hemoptysis), and toxemia, progressing rapidly to difficulty in breathing (dyspnea), and bluish discoloration of the skin and mucous membranes (cyanosis).There is another form of the disease called “bubonic plague”. While it is caused by the same organism, it is not transmissible through human contact. Pneumonic plague is transmissible through human contact.

Most likely means of dissemination: Solid or aerosolPrimary route of entry: Inhalation, absorption, or ingestionGeneral signs and symptoms: Sudden fever, chills, headaches, muscle aches, joint pain, dry cough, progressive weakness, and pneumonia.The disease is not transmissible through human contact.  When used as a WMD, infection would be acquired by handling infected material, eating or drinking contaminated food or water or by breathing in the bacterium.

Example: Phosgene Physical Properties: Heavy gas, smells like fresh cut hay. General Signs and Symptoms: Coughing and choking, followed by tightness in chest, nausea, vomiting and headache. Death is due to the accumulation of fluid in the lungs. Relative Rate of Action: Immediate in high concentrations to several hours in low concentrations.

Examples: Tabun, SarinPhysical Properties: Colorless liquid, usually odorless, but may have a fruity smell.General Signs and Symptoms: Difficulty in breathing, contraction of the pupils, blurred vision, headache, nausea, convulsions, and eventually death.Relative Rate of Action: Rapid, within minutes.    Photo courtesy of the Wikimedia Commons.

After the marrow is evaluated, the diagnosis is established and extent of the disease is determined. Follow up bone marrow examinations may be needed to monitor changes in the marrow following treatment or when signs and symptoms of relapse occur. To summarize, a bone marrow examination can provide valuable information to aid in the diagnosis of a variety of disorders. Due to the expense involved and the discomfort to the patient, clear indications of need should be present before this examination is undertaken.

Repetitive motions can cause a variety of disorders that affect nerves, tendons, and muscles. Symptoms can include tingling or numbness in the fingers or hands, decreased range of motion, decreased grip strength, sleep interupted by numbness or discomfort in the hands, pain in fingers, hands, or wrist, or pain shooting up into the forearms or arms.Some common afflictions that could affect laboratory workers due to the nature of their jobs are listed in the table below. Condition Symptoms Cause Carpal tunnel syndrome Pain that radiates up the arm, numbness or tingling in the thumb, index, or middle finger and weakness in the wrist and hand Compression of the median nerve that runs from the forearm into the hand Thoracic outlet syndrome Numbness and tingling in the hand, intensified with overhead activities Compression of the nerves and blood vessels between the neck and shoulder Radial tunnel syndrome Elbow pain, pain near the base of thumb, or pain anywhere in between. A common symptom is wrist weakness. Compression or entrapment of the radial nerve; may be caused by repetitive wrist and finger extension or repetitive forearm turning. Tendinitis Stiffness, tightness, and burning sensation; may experience a deep nonspecific pain. Grip impairment. Occurs most often in the tendons of the fingers, thumb, forearm, elbow, and shoulder. Repetitive motions or maintaining an awkward position that stresses tendons beyond their strength. Friction from overuse can cause inflammation. Tenosynovitis Pain, swelling, difficulty moving the joint in the affected area Inflammation of the tendon sheath

CPT (Current Procedural Terminology) codes are used to describe specific tests or services. The amount of payment for a test is dependent on the CPT code. It is against the law to use the wrong CPT code for a test for the purpose of causing or increasing payment for a test. ICD-9CM (International Classification of Disease, 9th Edition, Clinical Modification) codes are used to classify diseases and conditions, and describe signs, symptoms and medical circumstances. ICD-9CM codes are used to indicate the medical necessity of a particular test. It is against the law to use the wrong ICD-9CM code for the purpose of causing or increasing payment for a test.

ICD-9CM (International Classification of Disease, 9th Edition, Clinical Modification) codes are used for the classification of disease and conditions and for describing signs, symptoms and medical circumstances.These codes are used to indicate the medical necessity of a particular test.ICD-9 codes can only be supplied by the ordering physician or a representative of that physician. "Code steering" means to steer or direct a physician to supply an ICD-9 code that is payable. ICD-9 codes cannot be used from a previous laboratory order. If a physician supplies a narrative description instead of an ICD-9 code the laboratory must accurately translate that code using only certified coders.It is against the law to use the wrong ICD-9 code for the purpose of causing or increasing payment for a test.

ICD-9CM (International Classification of Disease, 9th Edition, Clinical Modification) codes are used for the classification of diseases and conditions, and for describing signs, symptoms and medical circumstances. These codes are used to indicate the medical necessity of a particular test. All employees who are directly or indirectly responsible for reporting to Medicare must be aware of these guidelines to prevent fraudulent claims: ICD-9 codes can only be supplied by the ordering physician or a representative of that physician. ICD-9 codes cannot be used from a previous laboratory order. If a physician supplies a narrative description instead of an ICD-9 code the laboratory must accurately translate that code using only certified coders. It is against the law to use the wrong ICD-9 code for the purpose of causing or increasing payment for a test.

The Hepatitis B Vaccine is one of the most important ways to prevent infection. About 90% of people who receive it get immunity. The present recombinant vaccine is made by genetically altered bakers yeast and contains no blood components. It is very safe.Side effects are minimal. Symptoms such as temporary soreness at the injection site, mild fever, or joint pain may occur but are rare.The procedure consists of three shots in the upper arm given over a six month period.The OSHA standard requires that employers provide the vaccine free of charge to you if your occupation puts you at risk. You may decline the vaccine; but you will be asked to sign a Declination Statement.

Five to twelve weeks after the exposure, some individuals may develop flu like illness, including nausea, vomiting, tiredness and loss of appetite. These may last from weeks to months.Approximately 80% of infected individuals will have no symptoms at all.

This is the most important section of all. It provides information on how the chemical could affect you. Is it a carcinogen? How can it enter your body? What are the signs and symptoms of overexposure to the chemical? What first aid procedures should be used in case of an accident?

Formaldehyde exposure as low as 0.1 ppm can cause: Skin irritation Tearing of the eyes Airway irritation Headaches and dizziness

Smalll spills (generally less than one liter) may in most instances by handled by laboratory or other employees. However, if you experience symptoms of over-exposure during the clean up, such as burning eyes, or throat irritation, immediately leave the cleanup area and get help from your institution's Spill Response team or other designated persons.Larger spills (generally greater than 1 liter) will usually require immediate assistance from the Spill Response team or other designees. There are several ways to clean up small spills, two of which are described below:1. Dike up the formaldehyde with absorbent pillows. Then dispose of these pillows in a sealed, formaldehyde-labeled container. 2. A chemical that reacts with and neutralizes formalin such as ALDEX® may be used to treat the spill.Your supervisor will show you the location of these emergency spill clean-up materials or discuss alternative procedures. Be sure to follow your own institution's policies and procedures in regard to formalin spills.

A category A infectious substance is in a form that is capable of causing permanent disability or life-threatening or fatal disease in otherwise healthy humans or animals when exposure to it occurs. Exposure would occur if the substance were released from its protective packaging and a human or animal came into contact with it. Some examples of category A infectious substances include: Bacillus anthracis (cultures only) Brucella abortus (cultures only) Brucella melitensis (cultures only) Burkholderia mallei (cultures only) Clostridium botulinum (cultures only) Dengue virus (cultures only) Escherichia coli, verotoxigenic (cultures only) Ebola virus Francisella tularensis (cultures only) Hantaviruses causing hemorrhagic fever with renal syndrome Herpes B virus (cultures only) Human immunodeficiency virus (cultures only) Lassa virus Mycobacterium tuberculosis (cultures only) Poliovirus (cultures only) Rabies and other lyssaviruses (culture only) Shigella dysenteriae type I (cultures only) West Nile virus (cultures only) Yersinia pestis (cultures only)This is not an exhaustive list. Sometimes, deciding on the classification of an infectious substance requires professional judgement and involves knowing the medical history or symptoms of the source patient or animal and/or knowing the local epidemiological conditions at the time the patient specimen or culture was obtained. If there is doubt as to whether or not a substance meets the criteria of category A, it must be treated as a category A substance for shipping.

Observe the patient carefully during the procedure and be on the lookout for reactions such as nausea and vomiting. If these or other symptoms persist, contact the patient’s physician. You may need to terminate the test. Of course, always follow your institution’s specific procedure for performing glucose tolerance tests.

Elliptocytes can vary in appearance from slightly oval to thin pencil-shaped forms. Less than 1% of red cells in normal blood are oval. Many examples of elliptocytes can be seen in this smear from a patient with hereditary elliptocytosis(HE). All cases of HE are associated with weakening of membrane skeleton and defective association of proteins that hold the skeleton together. The function of elliptocytes appear to be unaffected in most cases. Notice that the cells vary in shape from slightly oval to cigar-shaped. The largest percentage of elliptocytes is seen on smears from patients with hereditary elliptocytosis. Since many of these patients have no symptoms, the presence of elliptocytes on the smear may be the only diagnostic feature.

Literature Dutton RP, Shih D, Edelman BB, Hess J, Scalea TM. Safety of uncrossmatched type-O red cells for resuscitation from hemorrhagic shock. J Trauma. 2005 Dec;59(6):1445-9. Johnson ST, Rudmann SV,Wilson, SM. Serologic problem solving strategies:a systematic approach. Bethesda, MD: AABB, 1996.Online resourcesThe following are online examples of good practice. The information should not be used as a substitute for technical and clinical judgment. Medical and technical information becomes obsolete quickly and current sources relevant to the user's location should always be consulted. Urgent requirements for blood (Calgary Laboratory Services, Calgary,Alberta, Canada) Online resource for laboratory's clients Why is there never enough O Rh negative blood? (American Red Cross) Advice for physicians on how to help prevent shortages of O Rh negative blood Transfusion reactions: Transfusion complications (Canadian Blood Services) Education website for CBS's hospital customers REACT (Sunnybrook HSC, Toronto, ON, Canada) Pocket reference card for nurses on signs and symptoms of transfusion reactions Quick cals (online calculator of p values for Fisher's exact test) Use a one-tailed test (since we would expect an antibody to react with red cells that are positive for the corresponding antigen)

The following signs and symptoms are associated with acute HTR due to ABO incompatibility but can be associated with other blood group incompatibilities. ABO incompatibility typically results from patient misidentification.The more serious symptoms result from intravascular hemolysis (IVH) caused by antibodies such as anti-A and anti-B that can bind complement to C9.Signs and symptoms typically appear within minutes of the transfusion but can occur anytime during the transfusion. They may include: 1. Burning sensation along the vein being transfused (IVH due to complement activation to C9)*2. Lower back pain in the area of the kidneys (renal failure with subsequent oliguria/anuria) *3. Unexplained bleeding/oozing from a surgical site (fibrinolysis following DIC)*4. Hypotension leading to hypovolemic shock (release of vasoactive substances caused by C3a and C5a)5. Tightness in substernal area of the chest (bronchial constriction due to release of vasoactive substances caused by C3a and C5a fragments)6. Other symptoms: fever, chills, skin flushing, dyspnea, wheezing, anxiety, malaise, nausea, headache. * If untreated, these complications may lead to patient death.

Some blood safety standards require that a list of common signs and symptoms of suspected adverse reactions be included in both nursing and transfusion service manuals. Several organizations have developed job aids to help clinical staff recognize the signs and symptoms of various suspected transfusion reactions and to suggest appropriate actions (e.g., see REACT in Online Resources).

The natural history of TB infection is usually followed by an immune response and latency after exposure. In about 5-10% of cases, the latent period progresses to an active infection.The organism that causes TB infection is Mycobacterium tuberculosis. This organism is pictured in the photograph to the right as observed when stained with acridine orange stain. Infection occurs when a susceptible person inhales droplet nuclei containing Mycobacterium tuberculosis and the organism reaches the alveoli of the lungs.About 2-12 weeks after infection, the immune system limits multiplication of additional bacteria and the immunological test becomes positive.Latent tuberculosis infection (LTBI) is the stage when the viable organism remains in the body, and the patient has no symptoms and is non-infectious.Most infected persons do not experience clinical illness and are noninfectious. About 5-10% of persons infected with Mycobacterium tuberculosis who are not treated will develop TB during their lifetime. The risk for progression is highest during the first several years after infection.TB infects the lungs most often; however, it can infect almost any organ in the body, including bones and joints.

Symptoms of TB can mimic other diseases and the physician must consider the patient's history as well as physical symptoms before making a final diagnosis.

A 14 year-old boy came to the physician's office with a sore throat that progressively worsened over a three day period. His posterior pharynx was swollen ,shiney and erythematous. The boy complained of pain on swallowing. His temperature was 98.5F. A rapid direct streptococcal antigen test was positive. However, his symptoms did not subside over the next two days while on antibiotic therapy. Anorexia and nausea were persistent and compounded by a frontal headache. Cervical lymph nodes became noticeably enlarged. The results of the CBC were: WBC 11.9/mm3 with 17% segmented neutrophils, 5% bands, 72%(60% atypical--see photograph)lymphocytes and 6%monocytes. All red cell findings were normal. A monospot test was positive. This is a case of group-A streptococcal infection superimposed on infectious mononucleosis. Symptoms subsided in 3 weeks following completion of the antibiotic therapy.