Bronchitis, croup and pneumonia.
Diseases of the Lower Respiratory Tract Laryngitis (lar-in-ji'tis) is an inflammation of the larynx, especially the vocal cords, and bronchitis (brong-ki'tis) is an inflammation of the bronchi. Bacterial or viral infection can move from the upper respiratory tract to cause laryngitis or bronchitis.  Rating Newest Oldest. Best Answer: The answer is tuberculosis and pneumonia. An upper respiratory tract infection effects the nose, throat. larynx, and trachea, while a lower infection effects the lungs, bronchi, bronchioles, and aveoli. Diphtheria, influenza, and the common cold are all upper respiratory infections, so the answer is TB and pneumonia. TB and pneumonia occur in the lungs (lower respiratory tract) - all the rest of the answers have one upper respiratory diagnosis present so #3 is the right answer. Source(s): Health care provider. J B · 7 years ago. Symptoms include shortness of breath, weakness, fever, coughing and fatigue. There are a number of infections that can affect the lower respiratory tract. The two most common are bronchitis and pneumonia. Influenza affects both the upper and lower respiratory tracts. Antibiotics are the first line treatment for pneumonia; however, are not indicated in viral infections. Acute bronchitis typically resolves on its own with time.  Lower respiratory (tract) infection or LTRI is a generic term for an acute infection of the trachea (windpipe), airways and lungs, which make up the lower respiratory system. LTRIs include bronchitis, croup and pneumonia. Although influenza (the flu) can involve the lower respiratory system, it is not considered among the group of illnesses referred to by the term lower respiratory infection.. Lower respiratory infections are more common in the winter because people tend to stay indoors and share the same recirculated air (and germs). The most common lower respiratory tract infection is pneumonia, a lung infection. Pneumonia is usually caused by bacteria. Other pathogens such as viruses and fungi can cause pneumonia, severe acute respiratory syndrome and pneumocystis pneumonia. For the millions of people who suffer from respiratory diseases, each breath is a major accomplishment. These include diseases of the lung, pleural cavity, bronchial tubes, trachea, upper respiratory tract and of the nerves and muscles of breathing. This exchange process occurs in the alveolar region of the lungs. The respiratory system can be subdivided into an upper respiratory tract and a lower respiratory tract based on anatomical features. The upper respiratory tract includes the nasal passages, pharynx and the larynx, while the lower respiratory tract is comprised of the trachea, the primary bronchi and lungs.  The most common upper respiratory tract infection is the common cold, however, infections of specific organs of the upper respiratory tract such as sinusitis, tonsillitis, otitis media, pharyngitis and laryngitis are also considered upper respiratory tract infections. For the millions of people who suffer from respiratory diseases, each breath is a major accomplishment. These include diseases of the lung, pleural cavity, bronchial tubes, trachea, upper respiratory tract and of the nerves and muscles of breathing. Lower respiratory tract infections are more likely to cause fever, dyspnea, or chest pain than upper respiratory tract infections. Cough is often present in either upper or lower tract infections. People with influenza commonly have acute onset of fever, myalgia, headache, and cough. Self-treatment with antibiotics during travel can be considered for higher-risk travelers with symptoms of lower respiratory tract infection. A respiratory-spectrum fluoroquinolone such as levofloxacin or a macrolide such as azithromycin may be prescribed to the traveler for this purpose before travel. The most common lower respiratory tract infection is pneumonia, an infection of the lungs which is usually caused by bacteria, particularly Streptococcus pneumoniae in Western countries. Worldwide, tuberculosis is an important cause of pneumonia. 
http://www.mhhe.com/biosci/ap/foxhumphys/student/olc/res-reading2.html https://answers.yahoo.com/question/index?qid=20081207091044AAnP70C https://en.wikipedia.org/wiki/Lower_respiratory_tract_infection http://health.howstuffworks.com/diseases-conditions/respiratory/lower-respiratory-infection.htm http://aabafamilymedical.com/resources/respiratory-diseases/ http://www.disabled-world.com/health/respiratory/ http://aabafamilymedical.com/resources/respiratory-diseases/ http://wwwnc.cdc.gov/travel/yellowbook/2016/the-pre-travel-consultation/respiratory-infections https://en.wikipedia.org/wiki/Respiratory_disease
which of the following are considered diseases of the lower respiratory tract