Basic Science

Micro organisms causing food, water and air borne Diseases

Olawunmi Omosanya - Wed, 05th June, 2019 @ 12:18: PM



Disease causing Organisms:

Often times, diseases are transmitted by micro-organisms called germs or pathogens. These germs may contact their host either directly or indirectly. An example of direct contact may be seen when the host drinks infected water (contaminated by the bacterium Vibro cholerae). An indirect contact will occur when the disease causing organism (pathogen or germs) lives inside another organism called a vector. The pathogen does no harm to the vector but as soon as it’s introduced into the host, it begins its destructive activities. An example is a protozoan called plasmodium. Please read on protist here. The plasmodium lives inside the female anopheles mosquito. As soon as this mosquito pierces and sucks into its host, it introduces the plasmodium into the host’s blood where it commences its destructive actions. As a result, such host will get malaria; and the malaria was caused via the plasmodium and not the mosquito.

Please read on vectors here

Note the followings

A disease is a deviation from the normal physiological and anatomical state of an organism which is usually associated with some specific signs and symptoms.

Physiological state refers to the way an organism function.

Anatomical state refers to various structures associated with an organism.  

A vector is any organism that carries a disease causing organism (called germs or pathogens). Examples are houseflies and mosquitoes.

A host is an organism on which another organism (called a parasite) lives and feed on. They usually suffer in a parasitic relationship.

 

Diseases can be spread in various ways. These are:

  1. Food: through food borne pathogens.

  2. Water: through water borne pathogens.

  3. Air: through air borne pathogens.

  4. Direct skin contact or Personal contact.

  5. Vectors or Carriers.

 

The table below shows the summary of Diseases, their causative organisms, Mode of transmission and Symptoms in humans

Diseases

Causative Organisms

Mode of Transmission

Symptoms

Typhoid fever

Salmonella typhi (bacterium)

Food and Water

High fever, General body weakness, Constipation, Headache, Vomiting and Abdominal pain

Cholera

Vibro cholerae (Bacterium)

Water

Diarrhea (stooling) and vomiting, Abdominal pain, High temperature, High fever and Headache

Polio Myelitis (infant paralysis)

Poliovirus

Water

Paralysis of the limbs as a result of nervous disorders connecting to the limbs

Hepatitis

Hepatovirus

Water

Liver becomes swollen, Fever, Headache and Jaundice

Bacillic Dysentery

Shigella dysenteriae (Bacterium)

Water and Food

Diarrhea, Abdominal pain and Fever

Amoebic Dysentery

Entamoeba hystolitica (protozoan)

Food and Water

Diarrhea and vomiting, Abdominal pain

Food Poisoning

Bacillus cereus (Bacterium)

Food

Restlessness, Headache, Abdominal pain and vomiting

Para-Typhoid

Salmonella para-typhi (Bacteria)

Water and Food

High Fever, Constipation or Diarrhea

Measles

RNA paramyxovirus

 

Air and Body contact

Skin rashes, High fever, Cough, Body pain and Headache

Pneumonia

Bacterial pneumonia

Air

Difficulty in breathing, Cough and Fever

Tuberculosis

Mycobacterium tuberculosis (Bacterium)

Air and Food

Persistent dry cough, Blood in sputum, Loss of weight, Abnormal Sweating, High temperature

Small Pox

Variola major and Variola minor (virus)

Air

Skin rashes, Skin blisters and Fever

Common cold

Rhinovirus and Coronaviruses

Air

Runny nose, headache, high fever

Meningitis

Meningococcus (Bacterium)

Air

Stiffness of the neck, Vomiting, Headache and Fever

Chicken pox

Human Herpes virus 3 (HPV-3)

Air

Skin rash, Itchy skin

Whooping Cough

Bordetella pertussis (Bacterium)

Air

Cough, Cold, Vomiting, Fever

Influenza

Influenza Virus (types A and B)

Air

Shivering, Body Pain, Headache, High Fever

Topics in Basic Science

Benefits of the African Star Apple, Agbalumo or Udara Causes and Effects of improper Waste Management Uniqueness of Man Carbohydrates and Sugars Immunization explained Meaning of Drugs, Type of Drugs and their side effects Bones of the Human Body Vectors of diseases Micro organisms causing food, water and air borne Diseases Basic Science Mid Term Test questions, JSS1, 2nd Term




Topics in Basic Science

Benefits of the African Star Apple, Agbalumo or Udara Causes and Effects of improper Waste Management Uniqueness of Man Carbohydrates and Sugars Immunization explained Meaning of Drugs, Type of Drugs and their side effects Bones of the Human Body Vectors of diseases Micro organisms causing food, water and air borne Diseases Basic Science Mid Term Test questions, JSS1, 2nd Term



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