A wide range of organisms belonging to bacteria, viruses ,fungi ,protozoans ,helminthes etc. Could cause diseases in man
Such pathogens can enter our body by various means multiply and interfere with normal activities resulting in morphological and functional damage
1.Typhoid
Salmonella typhi is a pathogenic bacterium which causes typhoid fever in human beings.These pathogens generally enter in the small intestine through food and water contaminated with them migrate to other organs through blood
Sustained high fever (39-40 c) , weakness, stomach pain , constipation , headache , and loss of appetite are some of the common symptoms of this disease.
Complications:-
Intestinal perforation and death may occur in severe cases
2.Common cold
Rhino viruses represent one such group of viruses which cause one of the most infectious human ailments the common cold.
They infect the nose respiratory passage but not the lungs .The common cold is characterised by nasal congestion and discharge, sore throat , hoarseness ,cough, headache , tiredness etc. Which usually last for 3-7 days
Droplets resulting from cough or sneezes of an infected person are either inhaled directly or transmitted through
contaminated objects such as pens , books, cups , doorknobs, computer , key board, or mouse etc and cause infection in a healthy person
3.Pneumonia
Bacteria like streptococcus pneumoniae and Haemophilus influenzae are responsible for the disease pneumonia in humans which infects the alveoli (air filled sacs) of the lungs
As a result of the infection the alveoli get filled with fluid leading to severe problems in respiration
The symptoms of pneumonia include fever , chills , cough , and headache
In severe cases the lips and finger nails may turn gray to bluish in colour .A healthy person acquires the infection by inhaling the droplets /aerosols releated by an infected person or even by sharing the utensils with an infected person.
Dyse
Such pathogens can enter our body by various means multiply and interfere with normal activities resulting in morphological and functional damage
1.Typhoid
Salmonella typhi is a pathogenic bacterium which causes typhoid fever in human beings.These pathogens generally enter in the small intestine through food and water contaminated with them migrate to other organs through blood
Sustained high fever (39-40 c) , weakness, stomach pain , constipation , headache , and loss of appetite are some of the common symptoms of this disease.
Complications:-
Intestinal perforation and death may occur in severe cases
2.Common cold
Rhino viruses represent one such group of viruses which cause one of the most infectious human ailments the common cold.
They infect the nose respiratory passage but not the lungs .The common cold is characterised by nasal congestion and discharge, sore throat , hoarseness ,cough, headache , tiredness etc. Which usually last for 3-7 days
Droplets resulting from cough or sneezes of an infected person are either inhaled directly or transmitted through
contaminated objects such as pens , books, cups , doorknobs, computer , key board, or mouse etc and cause infection in a healthy person
3.Pneumonia
Bacteria like streptococcus pneumoniae and Haemophilus influenzae are responsible for the disease pneumonia in humans which infects the alveoli (air filled sacs) of the lungs
As a result of the infection the alveoli get filled with fluid leading to severe problems in respiration
The symptoms of pneumonia include fever , chills , cough , and headache
In severe cases the lips and finger nails may turn gray to bluish in colour .A healthy person acquires the infection by inhaling the droplets /aerosols releated by an infected person or even by sharing the utensils with an infected person.
Dyse
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