The organism that causes the disease is divided into five groups: viruses, fungi, bacteria, protozoa, and helminths (worms). The classes of microorganisms and parasites that cause the diseases are listed with typical specimens of each. The impressive diversity of these pathogens has caused the survival of two crucial features of adaptive immunity. First, the benefit of recognising a broad spectrum of different pathogens has driven the emergence of receptors on different cells with equal or greater diversity. The second is the differentiation of pathogens. Habitats and life cycles must be counteracted by multiple effector mechanisms.

 

The distinctive features of each pathogen are

 

Its mode of transmission,

Its mechanism of replication,

Its pathogenesis, or how it causes the disease, and hence the response it evokes.

 

Common diseases

Allergies

Allergies are immune reactions caused by allergens and normally harmful substances.

 

Causes of allergies

Allergic people have a sensitive immune system that reacts when they come into contact with allergens.

Common allergens are:

  • Food (nuts, eggs, milk, soy, shellfish, wheat)
  • Pollen
  • Mould
  • Latex
  • Animal dander

 

Symptoms

Because there are so many possible characteristics, the signs of an allergy are, and will be, very diverse caused by airborne substances such as pollen and pet dander they are prone to:

  • eye discomfort
  • stuffy nose
  • sticky nose
  • swollen, watery eyes
  • swollen, itchy nose and throat

 

Treatment

The easiest and best way to treat allergies is to prevent or avoid the cause. Where it matters, some lifestyle changes can reduce your allergy warnings. For example, if you’re sensitive to dust mites,  keep your bedroom clean and dust-free by regularly dusting, vacuuming, and washing the linens.

 

Cold and Flu

Colds and influenza (flu) are the most common illnesses among college students.

 

Causes of cold and flu

These infections are diseases of the upper respiratory tract, i.e. they affect the nose, throat and lungs. Viruses affect both colds and flu by increasing inflammation of the lining of the nose and throat. Most transmissions of these viruses occur through hand-to-hand contact.

 

Symptoms

Flu symptoms are unexpected and affect all parts of the body. Flu symptoms are often more severe than a cold and include:

  • fever (100°F),
  • headache
  • increased pain and fatigue, and
  • increased muscle, often dry cough
  • Being susceptible to bronchitis, sinusitis and ear infections 

Cold symptoms primarily affect the upper throat area and include:

  • runny or stuffy nose (nasal congestion),
  • sneezing
  • sore throat
  • snoring
  • You may also experience a slight headache, aching limbs or a slight fever. A common cold usually lasts 2-7days.

 

Treatment

If you experience any difficulties that cause you pain, you should consult a doctor.

Immediate medical  attention is required  if you have chronic cough,  fever of 102°F or higher, (especially severe fever, which could indicate pneumonia), etc.

Persistent pharyngitis (essential if no nasal discharge develops, which could mean a strep infection), or any cold that lasts more than 10 days. Because viruses cause colds and flu, antibiotics cannot cure them. There are tips to help you feel better and strengthen your system to fight the disease:

  • Rest and avoid exercise until symptoms go away.
  • Drink plenty of clear liquids (eg, water, tea).
  • Stay away from cigarette smoke.
  • Do not take antibiotics unless they are prescribed primarily to cure the illness you are currently suffering from.
  • Avoid drinking alcohol as it weakens your system and has to interact with medications.
  • Avoid caffeine, which can increase congestion and dehydration.

 

Conjunctivitis (“red eye”)

Causes of Red Eye

There are various causes for red eye, a condition of the transparent membrane (conjunctiva) that blocks the eyelids and a portion of the eyeball. It could be caused by a bacterial or viral infection, a pollen or animal dander allergy, or chemical irritants (smoke, chlorine, lens solution, etc).

 

Symptoms

These signs can last from a few hours to several weeks: redness, itching, tearing, burning, pus-like discharge and crusting of the eyelids. Because conjunctivitis causes the inflammation of the tiny blood vessels in the conjunctiva to become more central, the whites of your eyes appear pink or red.

 

Treatment

Because conjunctivitis is highly contagious, early diagnosis is essential. Bacterial causes are often cured with antibiotic eye drops; viral conjunctivitis goes away on its own, and allergies are often treated with a variety of treatments.

  • Keep yourself clean to avoid spreading current contamination to you and others.
  • Try not to rub your eyes.
  • Use cold water and a wet washcloth to drench off any crusting.
  • Use a cool pack to downsize distress.
  • Dispose of eye cosmetics as they will cause future diseases.
  • Wash any clothes that may be contaminated, including towels and pillowcases. Use clean towels and pillowcases daily.

 

 Diarrhoea

 

The bacterial illness is brought about by soiled food or water, and viral contamination is brought about by parasites saturating the body using food or water.

 

Impacts of Diarrhoea

  • Food narrow mindedness, similar to the need to process lactose, the sugar in milk
  • Abuse of liquor or diuretics
  • The drug, similar to certain anti-infection agents or acid neutralisers containing magnesium
  • Feminine issues
  • Stress or a panic

 

Treatment

  • Keep away from unhealthy food
  • Drink many clear fluids (e.g., water, tea).
  • Remain out from tobacco smoke.
  • Try not to take antimicrobials except if definitively recommended for you to reduce the ailment you as of now endure.
  • Try not to drink liquor since it debilitates your framework and you ought to communicate with meds.
  • Stay away from caffeine, which might expand clog and parchedness.

Conclusion

From the referenced article, we will see that numerous microorganisms present around us and in our bodies cause various infections. the different creatures are

Microscopic organisms. These one-cell living beings are obligated for streptococcal sore throat, plot diseases and tuberculosis.

Infections. Much more modest than microscopic organisms, infections cause numerous illnesses, from the cold to AIDS.

Growths. Many skin infections, similar to ringworm and athlete’s foot, are brought about by parasites. Different kinds of growths can contaminate your lungs or systema nervosum.

Parasites. Jungle fever is impacted by a flimsy parasite scattered by a sting. Different parasites could likewise be moved to people from creature dung.