Asthma is usually brought on by allergens in the environment, but respiratory tract infections caused by viruses have also been shown to cause asthma. Microbial infections can also eventually bring on asthma.
Bronchitis simply means "inflammation of the bronchioles". The bronchioles are the tubes connecting the trachea to the alveoli where air exchange happens in the lungs.
Common causes of bronchitis include asthma (an allergic or auto-immune disorder), bacterial infection and viral infection.
I have bronchial asthma and can be caused by exercise or allergiens.
alergen
What is the causative agent that caused you to ask this question
The causative agent of the symptoms of tetanus is Clostridium tetani.
The causative agent of syphilis is the bacterial spirochete called Treponema pallidum.
The genus of the causative agent of malaria is Plasmodium. It belongs to the group of protozoa.
The causative agent for Hepatitis B is Hepatitis B virus.
Rhinoviru
Rabies virus is the causative agent for rabies.
HIV is the causative agent for AIDS. It attacks the T Cells of the body.
The polio virus.
Fungus
Mycobacterium tuberculosis, the causative agent of TB
Female anophilis mosqutor