What are the 5 major types of infectious agents?

agents cause a wide variety of diseases affecting various parts of the body. The five main types of infectious agents are bacteria, protozoa, viruses, parasitic worms, and fungi.

What are the 4 main infectious agents?

The four different categories of infectious agents are bacteria, viruses, fungi, and parasites.

What are the common sources of infections?

Common sources of infection Sources, e.g. airborne, blood borne, sexually transmitted, fecal, oral, environment, stagnant water, warm-water systems, animals.

What are the six infectious agents?

  • Prions.
  • Viruses.
  • Bacteria.
  • Fungi.
  • Protozoa.
  • Helminths.
What are the 4 types of infections?

  • Viral infection. Viruses can cause a wide range of infectious diseases. …
  • Bacterial infection. …
  • Fungal infection. …
  • Parasitic infection.
What are the two main types of infectious agent?

Infectious agents come in many shapes and sizes. Bacteria and protozoans are microscopic one-celled organisms, while viruses are even smaller. Fungi grow like plants, and helminths resemble worms.

What are the three main sources of infectious agents in a healthcare setting?

  • Door handles. …
  • Floors. …
  • Laundry and linens. …
  • Lavatories. …
  • Medical equipment. …
  • Furniture. …
  • Dry-erase markers. …
  • Personal protective equipment (PPE)
What are infectious agents give examples Class 9?

  • Polio.
  • Rabies.
  • Mumps.
  • Dengue.
  • Plague.
  • Malaria.
  • Anthrax.
  • Cholera.

What do you mean by source of infection?

We refer to the source of infection as the origin from which a host acquires the infection, either endogenous (i.e. originating from a person’s own commensal microbial flora) or exogenous (i.e. an individual, animal or object that in the external environment of the host).

How are people a source of infection?

Some infections are spread when body fluids such as blood, saliva, urine (wees), faeces (poos) or semen come into direct contact with an uninfected person through kissing, sexual contact or through a needlestick injury.

What is the most common source of human infection?

The most common vector for human infection is the mosquito, which transmits malaria, West Nile virus, and yellow fever. Airborne transmission: Pathogens can also spread when residue from evaporated droplets or dust particles containing microorganisms are suspended in air for long periods of time.

What are the 10 common diseases?

  • Allergies.
  • Colds and Flu.
  • Conjunctivitis (“pink eye“)
  • Diarrhea.
  • Headaches.
  • Mononucleosis.
  • Stomach Aches.
What are the five most common sources infectious agents are transmitted from?

The most common sources of infectious agents causing HAI, described in a scientific review of 1,022 outbreak investigations,20 are (listed in decreasing frequency) the individual patient, medical equipment or devices, the hospital environment, the health care personnel, contaminated drugs, contaminated food, and

What is infectious agent?

Infectious agents are organisms that are capable of producing infection or infectious disease. They include bacteria, fungi, viruses, and parasites.

What are infectious disease give two examples?

What are Infectious Diseases? Infectious diseases are diseases caused by living organisms like viruses and bacteria. Described as contagious, they can be passed from person to person through body secretions, insects or other means. Examples are SARS, influenza, the common cold, tuberculosis (TB), Hepatitis A and B.

What is an infectious disease Class 5?

Infectious diseases are commonly transmitted through direct person-to-person contact. Transmission occurs when an infected person touches or exchanges body fluids with someone else. This can happen before an infected person is aware of the illness.

What are infectious agents list out all the infectious agents by giving one example each?

The agents that cause disease fall into five groups: viruses, bacteria, fungi, protozoa, and helminths (worms). Protozoa and worms are usually grouped together as parasites, and are the subject of the discipline of parasitology, whereas viruses, bacteria, and fungi are the subject of microbiology.

When can a human be a source of infection?

Man as a source: A person can be the source of infection in the following cases: 1) During the incubation period of a disease– in some infections the agent is secreted during the incubation period this is important as the infection is usually not known (e.g. Hep A and B)

Are pathogens infectious agent?

A pathogen may also be referred to as an infectious agent, or simply a germ. The term pathogen came into use in the 1880s. Typically, the term is used to describe an infectious microorganism or agent, such as a virus, bacterium, protozoan, prion, viroid, or fungus.

What are the 14 serious childhood diseases?

  • #1. Polio. Polio is a crippling and potentially deadly infectious disease that is caused by poliovirus. …
  • #2. Tetanus. …
  • #3. The Flu (Influenza) …
  • #4. Hepatitis B. …
  • #5. Hepatitis A. …
  • #6. Rubella. …
  • #7. Hib. …
  • #8. Measles.
What are the 20 most common diseases?

  • Pneumonia.
  • Fibromyalgia.
  • Scabies.
  • Chlamydia.
  • Endometriosis.
  • Strep throat.
  • Diverticulitis.
  • Bronchitis.
What is the most common infectious disease in childhood?

  • Common Cold. It’s not surprising that the common cold is one of the most common childhood illnesses. …
  • Ear Infections. Ear infections are some of the most common childhood illnesses. …
  • Influenza. …
  • Bronchitis. …
  • RSV. …
  • Hand, Foot, and Mouth Disease. …
  • Gastroenteritis. …
  • Sinusitis.
Where are infectious agents found?

Germs are a part of everyday life and are found in our air, soil, water, and in and on our bodies. Some germs are helpful, others are harmful. Many germs live in and on our bodies without causing harm and some even help us to stay healthy.

What are the 5 basic modes of transmission of infection?

The transmission of microorganisms can be divided into the following five main routes: direct contact, fomites, aerosol (airborne), oral (ingestion), and vectorborne. Some microorganisms can be transmitted by more than one route.

What are 5 ways diseases are spread?

  • Nose, mouth, or eyes to hands to others: Germs can spread to the hands by sneezing, coughing, or rubbing the eyes and then can be transferred to other family members or friends. …
  • Hands to food: …
  • Food to hands to food: …
  • Infected child to hands to other children: …
  • Animals to people: