Causes: Most URIs are viral in origin. More than 200 different viruses are known to cause the common cold. Most viral agents that cause
Rhinoviruses cause approximately 30-50% of colds in adults. They grow optimally at temperatures near 32.8°C (91°F), which is the temperature inside the human nares.
Coronaviruses are a significant cause of colds. However, exact case numbers are difficult to determine, because unlike rhinoviruses, coronaviruses are difficult to culture in the laboratory.
Enteroviruses, including coxsackieviruses, echoviruses, and others, are also leading causes of common colds.
Adenoviruses , orthomyxoviruses (including influenza A and B viruses), paramyxoviruses (eg, parainfluenza [PIV]), RSV, EBV, and hMPV account for many URIs. Varicella, rubella, and rubeola infections may manifest as a nasopharyngitis before other classic signs and symptoms
A viral URTI can be complicated by secondary bacterial infections
Group A streptococci (approximately 15% of all cases of pharyngitis) Group A beta hemolytic streptococci (GABHS)
Group C and G streptococci
Arcanobacterium (Corynebacterium) hemolyticum
Atypical bacteria, eg, M pneumoniae and C pneumoniae (However, absent lower respiratory tract disease, the clinical significance of these pathogens is unce rtain.)
Viruses cause most URIs, with rhinovirus, parainfluenza virus, coronavirus, adenovirus, respiratory syncytial virus, coxsackievirus, and influenza virus accounting for most cases. cause 5% to 10% of cases of pharyngitis in adults. Other less common causes of bacterial pharyngitis include group C beta hemolytic streptococci, Corynebacterium diphtheriae, Neisseria gonorrhoeae, Arcanobacterium haemolyticum, Chlamydia pneumoniae, Mycoplasma pneumoniae , and herpes simplex virus. Streptococcus pneumoniae, Haemophilus influenzae , and Moraxella catarrhalis are the most common organisms that cause bacterial superinfection of viral acute sinusitis. Less than 10% of cases of acute tracheobronchitis are caused by Bordetella pertussis, B. parapertussis, M. pneumoniae , or C. pneumoniae (TWAR). Direct invasion of respiratory epithelium results in symptoms respective to the area or areas involved.
Transmission of organisms causing URIs occurs by aerosol, droplet, or direct hand-to-hand contact with infected secretions, with subsequent passage to the nares or eyes. 8
Upper respiratory tract Infection The Nasal cavity Rhinitis - Inflammation of the nasal mucosa Rhinosinusitis, sinusitis - Inflammation of the nares and paranasal sinuses, including frontal, ethmoid, maxillary, and sphenoid Nasopharyngitis (rhinopharyngitis or the common cold) - Inflammation of the nares, pharynx, hypopharynx, uvula, and tonsils Pharyngitis - Inflammation of the pharynx, hypopharynx, uvula, and tonsils Epiglottitis (supraglottitis) - Inflammation of the superior portion of the larynx and supraglottic area Laryngitis - Inflammation of the larynx Laryngotracheitis - Inflammation of the larynx, trachea, and subglottic area Tracheitis - Inflammation of the trachea and subglottic area
Chest X ray – if focal signs on chest examination , fever with productive cough or prolonged symptoms of URTI , Lateral upper airways – Foreign body, Upper Airway obstruction, retro- pharyngeal abscess, epiglotitis.
Paracetamol Indication Temporary relief of pain. Reduces fever >38. Oral Adults 500mg to 1000mg 4-6 hourly – Max. 60mg/kg/day Precautions- Renal or hepatic dysfunction. Accidental paracetamol hepatotoxicity Dyspepsia, nausea, allergic and haematological reactions. Overdose can result in severe liver damage, renal tubular necrosis.
Ibuprofen Indication Temporary relief of pain. Reduces fever Oral Adults 400mg 4-6 hourly (Max 2400mg/24hrs) Short term use only. Non steroidal anti inflammatory / S2 NSAID sensitive asthma, rhinitis, urticaria, active GI bleeding, ulcer, <2 years. Precautions- prolonged use, history of GI bleeding,
In the vast majority of people, infection caused by a virus infection need only be treated with paracetamol (eg Calpol , Panadol ) to bring the temperature down. Aspirin (eg Disprin) is also useful, but should not be given to children under 16 years of age, unless on the advise of a doctor. In a small minority of patients, tonsillitis caused by bacteria is treated with penicillin or erythromycin (eg Erythroped) if the person is allergic to penicillin. If antibiotics are prescribed, it is important to complete the full course, or the infection may not be cured. Surgery to remove the tonsils (tonsillectomy) may be necessary for those patients suffering from repeated, severe infections that refuse to respond to treatment and significantly interfere with their school or work schedule but it is now a relatively uncommon operation compared to previous practice.
Frequent hand washing is the best way to prevent all kinds of infections, including tonsillitis. Wash your hands often, and encourage your children to do the same.
Who should get influenza vaccine? Everyone 50 years of age or older
All children 6–23 months of age
Residents of long-term care facilities and nursing homes
Anyone 2–49 years of age who has a serious long-term health problem, including heart disease, lung disease, asthma, kidney disease, a metabolic disease such as diabetes, or anemia and other blood disorders
Anyone who has a condition (e.g., spinal cord injury) that can affect their ability to cough out their respiratory secretions
Anyone whose immune system is weakened because of the following: HIV/AIDS or other diseases that affect the immune system, long-term treatment with drugs such as steroids, or cancer treatment with x-rays or drugs
Anyone 2–18 years of age on long-term aspirin treatment (who could develop Reye's syndrome if they catch influenza)
Women who will be pregnant during the influenza season
All healthcare workers, family members, or anyone else coming in close contact with people at risk of serious influenza disease (including household contacts of all children 0–23 months of age)
persons should not be vaccinated with live influenza vaccine:
Persons younger than five years of age
Persons 50 years of age or older
Persons with asthma, reactive airways disease or other chronic disorders of the pulmonary or cardiovascular systems; persons with other underlying medical conditions, including metabolic diseases such as diabetes, renal dysfunction, and hemoglobinopathy or persons with known or suspected immune deficiency diseases or who are receiving immunosuppressive therapies
Children or adolescents receiving aspirin
Persons with a history of Guillain-Barré syndrome
Healthcare workers, household members, and others who have close contact with severely immunocompromised individuals during the periods in which the immunosuppressed person requires care in a protective environment.
Vaccine Side Effects
Soreness, redness, or swelling where the shot was given
Fever (low grade)
INFLUENZA VACCINE DOSAGE BY AGE GROUP 2005-2006 SEASON
using an oral decongestant or a short course of nasal spray decongestant
gently blowing your nose, blocking one nostril while blowing through the other
drinking plenty of fluids to keep nasal discharge thin
avoiding air travel. If you must fly, use a nasal spray decongestant before take-off to prevent blockage of the sinuses allowing mucus to drain
If you have allergies, try to avoid contact with things that trigger attacks. If you cannot, use over-the-counter or prescription antihistamines and/or a prescription nasal spray to control allergy attacks