Question

TB, Flu, and COVID-19 all cause lower respiratory infections; however each pathology has unique symptomology. Compare and contrast these disease states. Be sure to include, site of infection, portal of entry, and treatments

Answer 1

COVID-19
Persistent cough
High fever
Difficulty breathing

Symptoms of COVID-19 usually appear quickly and disappear after about seven days. If they last longer than this, call NHS 111.

COVID-19 mainly affects your lungs and airways.

TB
Cough
Fever
Weight loss
Loss of appetite
Night sweats
Extreme tiredness

Symptoms of TB appear gradually over the course of several weeks and persist if they are not treated.

The primary site of infection in the lungs, known as the "Ghon focus", is generally located in either the upper part of the lower lobe, or the lower part of the upper lobe. Tuberculosis of the lungs may also occur via infection from the blood stream.

FLU

Common symptoms are similar — muscle aches, sore throat, and fever

each COVID-19 sufferer infects between two to three other people, while the seasonal flu typically infects 1.3 new people for each infected person.

It involve the upper respiratory tract and trachea, but fatal cases of influenza usually show evidence of pneumonia. This review concentrates on the pathology of the lower respiratory tract.

FLU AND COVID-19 transmission occurs when the virus (Infectious Agent), lives and grows in the client’s/patient’s/resident’s lungs and air passages (Reservoir), exits the respiratory tract through coughing and sneezing (Portal of Exit), travels via hands, surfaces and droplets (Mode of Transmission), and gains entry through the eyes, nose and mouth (Portal of Entry), to a Susceptible Host.

TB is spread through the air from one person to another. The bacteria are put into the air when a person with TB disease of the lungs or throat coughs, sneezes, speaks, or sings. People nearby may breathe in these bacteria and become infected. However, not everyone infected with TB bacteria becomes sick.

As these are viral disease thus take much time than usual.