What are the 4 types of infections?

The four different categories of infectious agents are bacteria, viruses, fungi, and parasites. When studying these agents, researchers isolate them using certain characteristics: Size of the infectious agent.
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What are 4 common bacterial infections?

Examples of bacterial infections include whooping cough, strep throat, ear infection and urinary tract infection (UTI).
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What is the most common type of infection in the body?

The common cold is the most common infection that occurs in humans. It is not usually a serious illness, but complications can sometimes arise.
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What are the 5 most common infectious diseases?

Common Infectious Diseases
  • Chickenpox.
  • Common cold.
  • Diphtheria.
  • E. coli.
  • Giardiasis.
  • HIV/AIDS.
  • Infectious mononucleosis.
  • Influenza (flu)
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What are the 4 5 stages of infectious diseases?

The five periods of disease (sometimes referred to as stages or phases) include the incubation, prodromal, illness, decline, and convalescence periods (Figure 2). The incubation period occurs in an acute disease after the initial entry of the pathogen into the host (patient).
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Infectious Diseases - An Introduction



What are the five signs of an infection?

Signs of Infection
  • Increased pain or swelling.
  • A foul smell from the wound.
  • Pus-like drainage, fever or chills.
  • Increasing redness around the wound.
  • Red streaks moving away from the wound.
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How do you know if your body is fighting an infection?

Symptoms of an infected cut or wound can include: redness in the area of the wound, particularly if it spreads or forms a red streak. swelling or warmth in the affected area. pain or tenderness at or around the site of the wound.
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What are the top 3 infectious diseases?

The world's deadliest infections, including Tuberculosis, Malaria and HIV/AIDS, have been considered as the "Big Three" infectious diseases (BTIDs). With leading infections and deaths every year, the BTIDs have been recognized as the world's greatest pandemics.
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What are the top 10 infectious diseases?

Mayo Clinic: “Infectious Diseases,” “Chlamydia trachomatis,” “Gonorrhea,” “Syphilis,” “Salmonella infection,” “Shigella infection,” “Hepatitis C,” “Influenza (flu),” “Staph infections,” “E. coli,” “Genital herpes,” “Norovirus infection,” ”Pneumonia,” “HIV/AIDS,” “Common cold.”
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What is the most common bacterial infection?

Bacterial respiratory infections (and pneumonia)

The most common cause is a pneumococcal infection with Streptococcus pneumoniae, although Staphylococcus aureus and Haemophilus influenzae can also cause it.
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What are the 4 main causes of infection?

Causes
  • Bacteria. These one-cell organisms are responsible for illnesses such as strep throat, urinary tract infections and tuberculosis.
  • Viruses. Even smaller than bacteria, viruses cause a multitude of diseases ranging from the common cold to AIDS.
  • Fungi. ...
  • Parasites.
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How does an infection make you feel?

feeling confused or dizzy. sore mouth or pain when swallowing. coughing or shortness of breath. pain, redness, discharge, swelling or heat at the site of a wound or intravenous line such as a central line or PICC line.
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Why do I keep getting infections in my body?

Some repeat infections, like pneumonia and bladder infections, may happen because of a genetic predisposition. That's an inherited tendency to get more infections than most people do. Structural issues. Repeat infections can also happen as a result of how your body is put together.
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What are 5 diseases caused by bacteria?

Other serious bacterial diseases include cholera, diphtheria, bacterial meningitis, tetanus, Lyme disease, gonorrhea, and syphilis. What condition is caused by the deposition of salts of uric acid?
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What are 4 examples of fungal infections?

Some common types of fungal infection include:
  • athlete's foot.
  • jock itch.
  • ringworm.
  • yeast infection.
  • onychomycosis, or a fungal infection of the nail.
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What are examples of viral infection?

Examples of viral infections
  • COVID-19, caused by a novel coronavirus.
  • Influenza (the flu)
  • HIV, which can lead to AIDS.
  • Meningitis (there is also bacterial meningitis)
  • Pneumonia (there is also bacterial pneumonia)
  • Human papillomavirus (HPV)
  • Herpes.
  • Rotavirus.
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What infection is one of the most frequently occurring bacterial infections in humans?

Pseudomonas infection is caused by strains of bacteria found widely in the environment; the most common type causing infections in humans is called Pseudomonas aeruginosa.
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What are the 10 common diseases?

Common Illnesses
  • Allergies.
  • Colds and Flu.
  • Conjunctivitis ("pink eye“)
  • Diarrhea.
  • Headaches.
  • Mononucleosis.
  • Stomach Aches.
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What organism can cause infection?

Infectious diseases are caused by pathogens, which include bacteria, fungi, protozoa, worms, viruses, and even infectious proteins called prions.
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What are 5 signs of a weak immune system?

6 Signs You Have a Weakened Immune System
  • Your Stress Level is Sky-High. ...
  • You Always Have a Cold. ...
  • You Have Lots of Tummy Troubles. ...
  • Your Wounds Are Slow to Heal. ...
  • You Have Frequent Infections. ...
  • You Feel Tired All the Time.
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In what stage of infection do acute symptoms of infection start to disappear?

The decline stage occurs when the number of infectious microbes declines and symptoms resolve. The final stage is convalescence. During this stage, symptoms disappear, and the body starts to recover.
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What are the early warning signs of sepsis?

The signs and symptoms of sepsis can include a combination of any of the following:
  • confusion or disorientation,
  • shortness of breath,
  • high heart rate,
  • fever, or shivering, or feeling very cold,
  • extreme pain or discomfort, and.
  • clammy or sweaty skin.
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How do you get rid of an infection in your body?

The treatment for bacterial infections is usually a course of antibiotics. Doctors may prescribe antiviral medications for certain viral infections, but few antiviral medications exist. There are some illnesses that tend to develop due to either bacteria or viruses.
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When should I worry about an infection?

the wound is large, deep, or has jagged edges. the edges of the wound do not stay together. symptoms of infection occur, such as fever, increasing pain or redness, or discharge from the wound. it is not possible to clean the wound properly or remove all debris, such as glass or gravel.
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What are the symptoms of infection in a woman?

Symptoms
  • vaginal itching and burning.
  • vaginal soreness and discomfort.
  • inflamed, flushed, or swollen skin around your vagina and vulva.
  • a change in the amount of vaginal discharge.
  • a change in the color of vaginal discharge.
  • pain or burning during urination.
  • pain during penetrative vaginal sex.
  • vaginal bleeding or spotting.
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