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    Type II Diabetes Mellitus: An Emerging Epidemic

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    Diabetes mellitus is a group of metabolic disorders characterized by inadequate insulin secretion by the pancreas or cellular destruction leading to an insulin deficiency.

    Depending on the cause of the insulin shortage, diabetes can be subcategorized into type I and type II. Type I diabetes (T1DM) is usually mediated by the destruction of b-cells in the pancreas resulting in decreased insulin production and secretion. Type II diabetes (T2DM) is the failure of these b-cells to secrete adequate amounts of insulin to compensate for insulin resistance and increased gluconeogenesis combined with an overall resistance to the insulin action (8. , 1997).

    T2DM accounts for 90 to 95 percent of all diabetes cases. While T2DM is traditionally viewed as an adult disease, its prevalence among children and adolescents is becoming a major medical crisis, particularly targeting minorities and those genetically prone, and resulting from the rising obesity rates, sedentary lifestyles, and dietary indiscretions. The disease is more commonly found in minorities, predominantly African Americans, Mexican Americans, and Native Americans. Studies of African American children have shown that compared to Caucasian children they have higher rates of insulinemia, increased b-cell activity, reduced insulin clearance, lower insulin sensitivity, and higher obesity risks (Arslanian, 2002).

    Although it is unclear if these factors are due to racial intrinsic differences, lifestyle, genetics, or other biological factors, these issues could easily explain the higher prevalence of T2DM among minorities. It is most accepted that a combination of these factors is the primary cause for the relationship between race and diabetes. Some of the symptoms associated with type II diabetes include polyuria, polyphagia, and polydipsia. At diagnosis, 33 percent of patients have ketonuria, and 5 to 25 percent have ketoacidosis, both of which can be tested for by simple urinalysis (American Diabetes Assoc.

    2000). Most patients of T2DM are obese with little to no weight loss, which allows doctors to distinguish them from type I diabetics. The total lack of insulin among type I diabetics, or insulin dependent diabetics, will result in problems in the storage of fat and muscle proteins causing the body to break them down. Hence, type I diabetics can be distinguished often by weight loss.

    Other symptoms such as damage to the kidneys, eyes, nerves, heart, and blood vessels can occur if the diabetes goes unnoticed for a prolonged period of time and glucose levels are not controlled (Novitt-Moreno, 1996). The detection of T2DM can be difficult because the patient may or may not have many of the symptoms depending on how severe their case is. Many of the symptoms are very similar to those of type I diabetes making classification difficult. Some patients are found to have glucosuria upon routine urinalysis, which could lead to the diagnosis. Ketouria can also be detected but usually only occurs in only one forth of patients who have type II diabetes.

    Simple clinical features of T2DM can assist doctors diagnosing and classifying the disease. More than 85 percent of patients diagnosed are overweight or obese. A family history of type II diabetes is found in the majority of patients who are known to have T2DM. A skin condition known as aconthosis nigricans is also common and can be detected by routine physical examination.

    It is characterized by hyperpigmentation and a velvety texture caused by long-standing hyperinsulinism and usually is found around the neck, inner thighs, and antecubital areas (Nesmith 2001). In addition to clinical signs, laboratory tests and evaluations are necessary to classify a person accurately. Diagnostic tests include fasting plasma glucose, random plasma glucose, glycosylated hemoglobin (HbA1c) measurements, and oral glucose tolerance testing. All tests are aimed at measuring the blood glucose levels of a patient and comparing them statistically with normal glucose levels of a population. One major problem for these tests is that they may not be accurate in predicting the onset of diabetes.

    The tests are used to determine what glycemic level would be appropriate to begin treatment for the body’s insulin resistance (Sadovsky, 2003). Since a normal person’s glucose level rises and falls within a certain value each day, getting an accurate value from a patient can often be difficult and could depend on many .

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    Type II Diabetes Mellitus: An Emerging Epidemic. (2019, May 29). Retrieved from

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