Agents which cause diseases are called

Disease Burden of Influenza. Urology of Virginia. Parasites — Health Professionals. Different Types of Infectious Diseases Blog 7 min. When studying these agents, researchers isolate them using certain characteristics: Size of the infectious agent Biochemical characteristics Method of interaction with the human host Treatment options Bacteria Bacteria are everywhere.

These are the pathogenic bacteria. Staphylococci — or staph infection Bacilli — Capsule-shaped bacteria ex. Streptobacillus moniliformis — or rat bite fever Spirilla — Spiral-shaped bacteria ex. Campylobacter jejuni — a form of food poisoning How Bacteria Cause Disease Bacteria enter the human host in a variety of methods. Treatment Options for a Bacterial Infection There are two common treatment options for a bacterial infection: Antibiotics — Also known as antibacterials, antibiotics suppress the serious infection by attacking the cell walls of bacteria.

Vaccines — Vaccines are a preventative measure that allow the body to create antibodies prior to being infected by the bacteria. These vaccines are weakened versions of the bacteria, allowing healthy immune systems to easily fight them off and become familiar with the disease. Viruses Viral infections and bacterial infections are often confused.

How Viruses Cause Disease Once a virus enters a healthy cell, it is invisible to the antibodies which circulate the bloodstream. Common Viruses The seasonal flu is one of the most well-known viruses.

Other common viruses include: Common cold Norovirus Stomach flu Hepatitis Treatment Options for a Viral Infection Viruses are harder to treat than bacterial infections. Instead, there are two major treatment options for viruses: Antivirals — While antibacterial drugs attack and kill bacteria, antiviral drugs do not attack and kill viruses.

Instead, they identify which cell is infected and then contain the virus within the cell, preventing it from reproducing. Vaccines — The vaccines for viral infections work similar to those for bacterial infections.

A weakened form of the virus is injected into the body in order to prepare the immune system to detect and fight the virus. Fungi Fungi are typically found on dead or rotten matter plant and animal and exist as one of two types of cells: yeast cells or mold cells. Yeast fungi — Scientists have discovered 1, species of these single-cell fungi. These fungi are the types of yeast that make bread grow and beer and wine alcoholic. Yeast cells range in size from 3 to 5 micrometers. Mold fungi — Mold is made up of multicellular filaments called hyphae.

These branching structures are between 2 and 10 micrometers and are found on rotting plant and animal matter. Treatment Options For a Fungal Infection Certain types of both yeast and mold cells are capable of causing devastating infectious diseases in people. These diseases are called mycoses, common ones being: Histoplasmosis Coccidioidomycosis Blastomycosis The treatment for an infected person is a combination of antibiotics and antifungals.

Parasites Parasites are living organisms that benefit from attaching to a host, at the detriment of the host itself. Studying Infectious Diseases When it comes to studying all these different types of infectious diseases, new technologies have allowed significant advancements to occur. When is comes to gentle cell sample preparation and single cell genomics —the research starts with NanoCellect Sources: Encyclopedia Britannica.

Related Blog Posts. Blog 5 min. Blog 4 min. Blog 7 min. It must be possible to re-isolate the microorganism from the second diseased host.

How would you define an infectious disease? A noninfectious disease? Create a table that compares an example of each type of infectious agent—bacterium, virus, and parasite. Using the following criteria, compare how the three types of infectious agents are similar and how they differ: biological characteristics of this agent how the agent is spread the symptoms this agent might cause methods of treatment and prevention Why is it important to specify that a parasite must be of a different species from the host?

Design an experiment using primates and simian immunodeficiency virus that would prove that this virus is the causative agent of AIDS in primates. Main menu About Us Modules Home.

Cell death liver, blood ; toxins released from cells. Chills, high fever, profuse sweating, headache, nausea, vomiting, anemia, convulsions. Causes Intestinal Distress. Bloody diarrhea; intestinal lesions. Cat feces; undercooked beef. Causes Toxoplasmosis. Intracellular growth of parasite.

Often asymptomatic; flu- like symptoms; birth defects in pregnant women. Absorbs nutrients from intestinal tract. Often asymptomatic; weight loss, hunger, fatigue. Water borne. Causes Schistosomiasis. Eggs shed by the adult worms lodge in the intestine or bladder; damage to liver, intestine, spleen, lung, bladder. Rash, itchy skin, fever, chills, cough, muscle aches. Causes river blindness. Blindness, skin lesions. Causes inflammation; carries Lyme's disease.

Damage to epithelial cells. Causes inflammation; carries bubonic plague. Rash, red bumps, very itchy. Causes inflammation; carries malaria. Red spot or bump; itching. Direct contact with respiratory and other body fluids. Sore throat, necrotizing fasciitis, toxic shock syndrome.

Cell, tissue, and muscle destruction. Sore throat, rash, cellulitis. Diarrhea, fever, and abdominal cramps. Watery diarrhea, abdominal and leg cramps, fever. Sexual contact. Destruction of epithelial and endothelial cells. Small, painless ulcers, rosy rash, paralysis, blindness, dementia. Bacterial growth in the lymph nodes. Fever, headache, chills, weakness, and swollen, tender lymph glands. Direct contact with respiratory fluids. Intracellular growth of bacteria causing lung tissue destruction.

Fever, fatigue, chronic cough with blood and phlegm. Water, oral. Destroys motor neuron cells. Fever, sore throat, headache, vomiting, fatigue, muscle pain and weakness, paralysis. Aerosol, Inhalation of infectious droplets; Direct contact with respiratory fluids.

Death of epithelial cells in nose, throat, and lungs. Fever, cough, sore throat, runny or stuffy nose, muscle aches, headaches, fatigue. Direct contact with body fluids. Hemorrhagic fever. Infects cells of immune system and endothelial cells of vascular system causing blood leakage. Nausea, high fever, muscle pain, malaise, diarrhea, red eyes,, severe weight loss, occasionally bleeding from eyes, ears nose, rectum.

Aerosol, inhalation of infectous droplets. Rubeola measles. Infects cells of immune system and epithelial cells. High fever, cough, runny nose, red and watery eyes, rash. Sexual contact; blood. Destroys immune cells CD4 cells. Lack of energy, weight loss, fevers and sweats, frequent yeast infections, skin rashes or flaky skin, short-term memory loss, mouth, genital, or anal sores. Direct contact with contaminated surfaces; fecal-oral.

Epithelial cells of the gastrointestinal tract. Severe diarrhea, vomiting, fever, dehydration. Severe bloody diarrhea, lethargy, anorexia, fever, vomiting, severe weight loss. Direct contact with contaminated objects and people; airborne with infected droplets of saliva. Epithelial cells lining respiratory tract and other organs including skin. High fever, fatigue, headache, backache, rash with flat red sores. Direct contact with contaminated objects and people; airborne with infected droplets; fecal-oral.

Common cold, sore throat, bronchitis, pneumonia, diarrhea, pink eye conjunct-tivitis , gastro-enteritis. What are Staphylococcal infections? What are Streptococcal infections? What is Salmonella? What is tuberculosis? What is antibiotic resistance? What is HIV? How helpful was this page? What's the main reason for your rating?

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