Author Archives: Manbir & Gurpreet
Melanoma
| Melanoma | |||
| Skin cancer is the most common of all cancers. Melanoma, the most serious form, accounts for 4 percent of skin cancer cases but causes 79 percent of skin-cancer deaths. |
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| Melanoma originates from melanocytes, pigment cells present normally in the skin. The tumor can affect adults of all ages, even young individuals (starting in the mid-teens). The incidence has increased dramatically -a 300 percent increase in the past 40 years or so. | ![]() |
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| The individuals most susceptible to development of melanoma are those with fair complexions, red or blond hair, blue eyes, and freckles and who tan poorly and sunburn easily. Increased risk include a family history of Melanoma. Dark-skinned populations (such as those of India and Puerto Rico), blacks, and East Asians have rates 10 to 20 times lower than lighter-skinned whites.Typically they start as a mole. Sometimes a mole of many years changes in size, shape, color or elevation, or starts to bleed. | ![]() |
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How to suspect a Mole:
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Early detection of melanoma may be facilitated by applying the “ABCD rules”:A– asymmetry, benign lesions are usually symmetricB– border irregularity, most nevi have clear-cut borders
C– color variegation, benign lesions usually have uniform light or dark pigment D – diameter > 6 mm (the size of a pencil eraser). |
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Acral lentiginous melanoma is more common in blacks, Asians, and Hispanics and occurs as an enlarging hyperpigmented macule or plaque on the palms and soles.![]() |
![]() Nodular melanoma most commonly manifests itself as a rapidly growing, often ulcerated or crusted black nodule. |
Irradiation of food
| Irradiation of food |
| Irradiation of food has been approved in 37 countries for more than 40 products. The radiation of interest in food preservation is ionizing radiation, also known as irradiation. These shorter wavelengths are capable of damaging microorganisms such as those that contaminate food or cause food spoilage and deterioration. Irradiation is known as a cold process. It does not significantly increase the temperature or change the physical or sensory characteristics of most foods.Food is irradiated to provide the same benefits as when it is processed by heat, refrigeration, freezing or treated with chemicals to destroy insects, fungi or bacteria that cause food to spoil or cause human disease and to make it possible to keep food longer and in better condition in warehouses and homes.Because irradiation destroys disease causing bacteria and reduces the incidence of food borne illness, hospitals sometimes use irradiation to sterilize food for immuno-compromised patients. Irradiated foods are wholesome and nutritious. All known methods of food processing and even storing food at room temperature for a few hours after harvesting can lower the content of some nutrients, such as vitamins. At low doses of radiation, nutrient losses are either not measurable or are not significant. At the higher doses used to extend shelf-life or control harmful bacteria, nutritional losses are less than or about the same as cooking and freezing. As in the heat pasteurization of milk, the irradiation process greatly reduces but does not eliminate all bacteria. Irradiated poultry, for example, still requires refrigeration, but would be safe longer than untreated poultry. Strawberries that have been irradiated will last two to three weeks in the refrigerator compared to only a few days for untreated berries.Irradiation does not make food radioactive.Eating irradiated food does not present long-term health risks. In the United States, the Food and Drug Administration (FDA) has approved irradiation for eliminating insects from wheat, potatoes, flour, spices, tea, fruits, and vegetables. Irradiation also can be used to control sprouting and ripening. Approval was given in 1985 to use irradiation on pork to control trichinosis. Using irradiation to control Salmonella and other harmful bacteria in chicken, turkey, and other fresh and frozen uncooked poultry was approved in May 1990. |
| Potential food irradiation uses | |
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| Type of food | Effect of Irradiation |
| Meat, poultry | Destroys pathogenic fish organisms, such as Salmonella, Clostridium botulinum, and Trichinae |
| Perishable foods | Delays spoilage; retards mold growth; reduces number of microorganisms |
| Grain, fruit | Controls insect vegetables, infestation dehydrated fruit, spices and seasonings |
| Onions, carrots, potatoes, garlic, ginger | Inhibits sprouting |
| Bananas, mangos,papayas, guavas, other non-citrus fruits | Delays ripening avocados, natural juices. |
| Grain, fruit | Reduces rehydration time |
Other uses of Irradiation – In addition to cancer treatment, irradiation is used for many purposes, including: performing security checks on hand luggage at airports, making tires more durable, sterilizing manure for gardens, making non-stick cookware coatings, purifying wool, sterilizing medical products like surgical gloves, and destroying bacteria in cosmetics.
Since 1986, all irradiated products must carry the international symbol called a radura, which resembles a stylized flower. |
Impetigo
| Impetigo | |
| Impetigo (Pyoderma) is a superficial infection of the skin caused primarily by group A streptococci and occasionally by other streptococci or by Staphylococcus aureus.This condition is seen most often in young children, tends to occur during the warmer months, and is more common in semitropical or tropical climates than in cooler regions. The infection occurs especially often among children living under conditions of poor hygiene. Minor trauma, such as a scratch or an insect bite, may then serve to lodge bacteria into the skin and cause this infection. While the bacteria causing impetigo may have been caught from someone else with impetigo or boils, impetigo usually begins out of the blue without any apparent source of infection. Impetigo is best prevented, therefore, by attention to adequate hygiene. |
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| The usual sites of involvement are the face (particularly around the nose and mouth) and the legs, although lesions may occur at other locations. Individual lesions begin as red papules, which turn quickly to vesicular and then pustular lesions that break down and coalesce to form characteristic honeycomb-like crusts. Lesions generally are not painful, and patients do not appear ill. Fever is not a feature of impetigo. |
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| Bullous impetigo is a distinctive form of impetigo characterized by the presence of more extensive, bullous lesions that break down and leave thin paper like crusts instead of the thick amber crusts of impetigo. | ![]() |
Treatment Consists of cleaning the lesions with soap and water and topical and systemic antiboiotics.
Among the antibiotics useful are dicloxacillin, cephalexin, or topical mupirocin ointment provide the most reliable treatment for impetigo, although penicillin or erythromycin are cheaper alternatives and equally effective. A possible complication of Impetigo is glomerulonephritis, a type of kidney disease. |
Precautions:Impetigo is contagious when there is crusting or oozing. While it’s contagious, take the following precautions:
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Skin Diseases Ecthyma |
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Boa Snake
| Boa Snake Boa is a common name for non poisonous snake of boa and python family. Boa and python family contains some 70 species. Like pythons boa too kill their prey by constricting them to death and then swallowing it whole. They can stretch their jaws wide appart more than the size of their head to swallow a large animal. While a large boa might easily kill an average-size person, it would have difficulty swallowing the body, and is generally not considered a threat to humans. |
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| Tree boas are brightly colored tree boa, live in trees. With their triangular heads, elliptical eye pupils, and long, curved front teeth, they resemble the venomous vipers. | ![]() |
| Boas give birth to their young, while pythons lay eggs; pythons are confined mostly to the Old World, whereas boas are found worldwide.
In the jungles of Central and South America boa constrictor is a reddish-gray, with a ladder of broad, dark stripes.
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Constrictor Boa Snake |
| Rubber boa, found throughout the southwestern U.S. The rubber boa, whose shiny brown skin actually resembles rubber, is a burrowing animal. With its blunt head and tail, it is sometimes called a two-headed snake. |
Constrictor Boa Snake
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Since 1986, all irradiated products must carry the international symbol called a radura, which resembles a stylized flower.




