Pathogens and the spread of disease essay

infectious disease essay introduction

Some pathogens are able to progress from one more It is immediately clear that the majority of them are at Level 2; they can infect humans but are rarely if at all transmitted between humans. Figure 3 Modes of Infectious Disease Transmission A Pathogens can be transferred by environmental factors, such as wind and water.

Pathogens and the spread of disease essay

When sweat evaporates, salt is left behind on the skin. Resistance to antimicrobial agents One of the ongoing problems scientists and medical workers face in the fight against infectious diseases is the development of resistance to the agents used to control them. An infection may cause no symptoms and be subclinical or it may cause symptoms and be clinically apparent Malaria, a protozoan disease, was successfully treated for many years with chloroquine, a drug that was widely available over the counter in regions where malaria was a problem. It is a primary cause of hospital-acquired infections. Acknowledging the complex, multifaceted nature of ethical discussions is not to suggest that "anything goes. Prusiner SB. But it also worries me that this fortunate situation may not last very long. Because gastrointestinal pathogens typically leave the body in the feces, public water must be guarded against contamination from sewage. Isolation precautions are "practices of infection control to reduce or eliminate the transmission of pathogens" Foundations Of Nursing. The early study of a diseases origin has ensured the survival of mankind against wide spread death and illness. To compare A. Waterborne diseases are caused by pathogenic microorganisms that most commonly are transmitted in contaminated fresh water. Finally, the complement proteins in the blood participate in a cascade of molecular events that result in inflammation, the release of molecules that stimulate phagocytic cells, and the formation of a complex of proteins that binds to the surface of bacterial or infected host cells and lyses those cells.

Pathogen Diversity Surveys of Pathogen Species Although the existence of pathogens has been recognized for centuries, the first comprehensive list of human pathogen species was not published until Taylor, Latham, and Woolhouse All that pleasure can be diminished by something deadly. In just ten days, people became ill and died within yards of the intersection of Broad and Cambridge Street.

Yet, some argue that AIDS patients who knowingly infect others may have their right to privacy overridden so that partners may be notified of the risk of contracting AIDS.

list of diseases caused by bacteria

Eat only fruits and vegetables that you can wash and peel yourself. Frequencies of outbreaks of different sizes grey bars are compared with the fit of a statistical model to the data open bars. In contrast, less than four months elapsed between the description of hantavirus pulmonary syndrome HPS in and the identification of the previously unknown viral agent, now called Sin Nombre virus.

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