Diseases

I . IntroductionPathology is the scientific study of affection (pathos means distress logos means science . Pathology is first concerned with the seethe off , or etiology , of disease . Second , it deals with pathogenesis , the direction in which a disease develops . Third , pathology is concerned with the morphological and operating(a) changes brought by disease and with its final effects on the bodyAlthough the stimulate contagion and disease atomic number 18 roughtimes use interchangeably , they differ nighwhat in meaning . Infection is the impacted tooth or colonization of the body by pathogenic micro-organisms . A disease occurs when an infection results in any change from a state of health . Disease is an ab modal(prenominal) state in which part or all of the body is non correctly change or is not capable of carrying on its normal functions . An infection whitethorn exist in the absence of detectable disease For example , the body may be infect with the virus that causes pestilential Typhus , plainly there may be no symptoms of the diseaseThe presence of a particular typesetters case of microorganism in a part of the body where it is not ordinarily found is also called an infection - and may communicate to disease . For example , although large numbers of E . coli atomic number 18 normally present in the healthy intestine , their infection of the urinary tract usually results in disease . a equate of(prenominal) microorganisms are pathogenic . In fact , the presence of well-nigh microorganisms can even benefit the hostThis intent to scrutinize the intravenous feeding dreadful diseases such as Chagas Disease , Malaria , Bubonic , and epiphytotic TyphusII . DiscussionsA . Chagas DiseaseAmerican Trypanosomiasis (Chagas disease ) is a protozoan disease of the cardiovascula r placement . The causative agent is Trypa! nosoma cruzi (tri-pa-no-so ma kruz e , a cream protozoan . The disease occurs in the extreme southern mingle States , Mexico , Central America , and into South America .

Only a few cases have been reported in the United States solely the disease infects 40 to 50 of the population in or so rural areas of South America (see Chagas Disease . Grolier Encyclopedia of familiarity , pp . 365-371The root for T . cruzi includes a wide variety of raving excited savages including rodents , opossums , and armadillos . The arthropod vector is the reduviid bug , called the kissing bug because it oft bites persons tightly fitting the lips . The insects live in the cracks and crevices of mu d or rocknroll huts with thatched roofs . The trypanosomes , which grow in the gut of the bug , are passed on if the bug defecates while feeding . The bitten human or animal often rubs the feces into the bite wound or early(a) skin abrasions by scratching or into the eye by rubbing . A bizarre means of transmission at times occurs in remote areas in Mexico , where reduviid bugs are eaten as an aphrodisiac (see Chagas Disease Grolier Encyclopedia of Knowledge , pp . 365-371At the come in of vaccination , the trypanosomes reproduce and pass through various stages of their keep bicycle . A swollen lesion develops at the inoculation state of affairs (often near the eye . The parasites are carried by the blood to more variety meat of the...If you want to get a wide-cut essay, order it on our website: OrderEssay.net

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