Cancer is one of the most important non-infectious or non-communicable diseases.
Biology term papers Disclaimer: Free essays on Biology posted on this site were donated by anonymous users and are provided for informational use only.
A disease is defined as a physical or mental disorder or malfunction with a characteristic set of signs or symptoms. Diseases may be caused by a single factor or be multifactorial. There are a number of different causes of disease in humans. Essays & Papers The Epidemiology Of Infectious Diseases Biology Essay - Paper Example The Epidemiology Of Infectious Diseases Biology Essay Infectious diseases have ever existed and have had a major impact on human development - The Epidemiology Of . The remainder of the list includes two non-disease-related conditions (accidents at no. 5 and suicide at no. 8), three more noninfectious diseases (diabetes mellitus at no. 7, kidney disease at no. 9, and chronic liver disease and cirrhosis at no. 10); and just one infectious-disease-related set of causes.
The free Biology research paper Animal Diseases essay presented on this page should not be viewed as a sample of our on-line writing service.
Animal diseases are a great concern to humans for several reasons. They can reduce the productivity of animals used to produce food, such as hens and dairy cows. Animals that are raised for food, such as pigs and beef cattle, that become ill may affect the economy of many industries.
Some animal diseases can be transmitted to humans, and control of these types of diseases, known as zoonoses, is vital to public health. Animal diseases are identified as infectious and non infectious.
Infectious diseases are caused by an agent, such as bacteria or a virus, while non infectious diseases are caused by factors such as dieting, environment, injury, and heredity.
Sometimes the cause of a disease is unknown. An animal may also experience more than one disease at the same time. To identify a disease, a veterinarian first determines the animals species, breed, age, and sex.
The information helps him identify a disease because some diseases are more prevalent in certain species, or a disease may preferably affect one sex or age group. The vet then gathers a complete history of the animal and its problem. This history includes the symptoms the animal is displaying and when they first appeared, as well as whether the animal has been exposed to something new in its surroundings or to other animals.
The vet gives the animal a physical examination, which may include measuring its body temperature, listening to its heart, checking its pulse, and feeling its abdomen and lymph nodes.
The vet then creates a list of possible diseases that may be making the animal sick. The list may be narrowed by running a few diagnostic tests such as X rays, electrocardiograms, blood analyzes, and bacterial or fungal cultures.
Once the disease is identified, the doctor develops a treatment plan for the animal. For example, the multi chambered stomach of a cow contains bacteria that helps the animal digest its food. But many other microscopic organisms, known as pathogens, cause diseases in animals.
Pathogens include bacteria, viruses, fungi and parasites. Pathogens are easily spread by an animal consuming food or drinking something that has been contaminated with infected material, for example. If the ground is contaminated by Salmonella bacteria, infection can travel from barn to barn on the soles of a farmer's boots.
Or an animal may be exposed while walking across contaminated ground. Some diseases are transmitted by biting insects; others are spread by sexual contact.
In addition to reducing the productivity fertility of livestock, some infectious diseases pose a danger to humans. Most cases are transmitted from animals that have close contact with humans, such as pets, farm animals, or rats. As the human population grows and expands into wilderness territories, humans are coming into closer contact with other animals that carry pathogens dangerous to humans.
Some of these pathogens are carried by insects, like the case of the yellow fever, which is spread from monkeys to humans via mosquito bites.
Some hemorrhagic fevers, such as that caused by Ebola virus, are recognized as zoonoses, but the exact route from animal to human is still unknown. In its many forms, it is one of the major disease of wild and domestic animals, birds, and reptiles, along with humans. Salmonella bacteria usually enter the body through the mouth, most commonly along with food or water contaminated by infected filth.
Transmission also may occur through direct contact with an infected animal. In addition, salmonella bacteria can be spread by contact with objects, such as bowls and cutting boards, that have been contaminated by infected animal products, such as eggs or meat.
Leptospirosis, is caused by spiral Leptospira bacteria, and affects cattle, dogs, pigs, sheep, goats, and humans. Ponds, lakes, and other bodies of water are common sources of leptospirosis, and rodents may carry the infection. This infection causes kidney disease and destruction of red blood cells with potential anemia; it may also cause abortion.- Illness and death from infectious diseases are particularly tragic because they are preventable and treatable.
Not surprisingly, the poorest and most vulnerable are the most severely affected by infectious disease.
Infectious diseases are a major cause of death, disability and social and economic turmoil for millions around the world. - Disease and Pathology Lyme disease, or lyme borreliosis, is an emerging infectious disease transmitted by ticks. Lyme disease is considered an emerging infectious disease because it’s incidence has increased over the past 20 years, and it was not identified until in the United States (CITE).
Animal diseases are identified as infectious and non infectious. Infectious diseases are caused by an agent, such as bacteria or a virus, while non infectious diseases are caused by factors such as dieting, environment, injury, and heredity.
Human Biology and Infectious Diseases graduate Yvette went on to Masters level study at Salford, a PhD at Liverpool and is now working as a research scientist . A disease is defined as a physical or mental disorder or malfunction with a characteristic set of signs or symptoms.
Diseases may be caused by a single factor or be multifactorial. There are a number of different causes of disease in humans.
Short Essay on Human Diseases! A disease is a condition that impairs the proper functioning of the body or of one of its part. Every living thing, both plants and animals, can succumb to disease.