Respiratory tract infections

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Presentation transcript:

Respiratory tract infections Krzysztof Buczkowski

Epidemiology Respiratory tract infections are the most common cause of visits among children and the second among adults Represent 60% of all community-acquired infections and are the most common cause of fever

Etiology Viruses Rhinoviruses Adenoviruses Coronaviruses Influenza and Parainfluenza Viruses Respiratory Syncitial Viruses Enteroviruses

Etiology Bacteria Atypical bacteria Streptococcus pneumoniae Haemophilus influenzae Moraxella catarrhalis Streptococccus pyogenes Less common Escherichia coli Klebsiella pneumoniae Enterobacter sp. Pseudomonas aeruginosa Chlamydophila pneumoniae Mycoplasma pneumoniae Legionella pneumophila

Respiratory tract infections caused by viruses

The common cold It is not a specific disease but rather a group of illnesses whose symptoms are caused by one of a large number of viruses. The average adult experiences two to three colds per year, while children average 8 to 12 colds per year. 

The common cold primarily transmitted from person-to-person via hands less often, the virus can be transmitted by touching a surface, sneezing or coughing

The common cold There is no specific treatment for the viruses that cause the common cold. Most treatments are aimed at relieving some of the symptoms of the cold, but do not shorten or cure the cold. The symptoms of a cold will resolve over time, even without any treatment.

The common cold Runny nose and nasal congestion pseudoephedrine is a decongestant that can improve nasal congestion. nasal sprays such an oxymetazoline However, these sprays should never be used for more than three days; use for more than three days can worsen congestion

The common cold Sore throat and headache are best treated with a mild pain relievers such as paracetamol or ibuprofen. Cough — dextromethorphan. However, the benefit of cough medicines is likely to be small to non-existent

Sore throat A sore throat is pain, scratchiness or irritation of the throat that often worsens when you swallow. A sore throat is the primary symptom of pharyngitis — inflammation of the throat (pharynx). The terms "sore throat" and "pharyngitis" are often used interchangeably.

Sore throat The most common cause of a sore throat is a viral infection. A sore throat caused by a virus resolves on its own with at-home care. Strep throat (streptococcal infection), a less common type of sore throat is caused by bacteria, requires additional treatment with antibiotic drugs to prevent complications.

Sore throat Etiology - viruses represent 70-85% Rhinoviruses Coronaviruses Adenoviruses Epstein-Barr virus Coxackie Herpes Simplex Influenza and Parainfluenza Viruses

Strep throat Etiology: bacteria represent about 15-30% Predominant is Group A β-hemolytic streptococcus (GABHS), which causes strep throat  Less common bacteria causes include Staphylococcus aureus. Streptococcus pneumoniae, Mycoplasma pneumoniae

Carriage of S. pyogenes is found in about 5-21% of children aged 3-15 Infection occurs by droplet or as a result of the activation of carriage The incubation period ranges from 12 hours to 4 days Infectivity period ends 24 hours after the start of effective antibiotic therapy The risk of transmission of infection in household contacts is approximately 25%

Modified Centor Tonsillar exudate or erythema Anterior cervical adenopathy Cough absent Fever present Age (especially) 3 to 14 years

Quick strep test If there is negative streptest in children we should do throat swab culture

Which antibiotic should I prescribe for strep throat? Prescribe phenoxymethylpenicillin for 10 days. Rather avoid prescribing broad-spectrum penicillins (such as amoxicillin and ampicillin)

Throat swab– clinical interpretation Bacteria carriage in the throat of healthy population S. aureus 10-40% S. pneumoniae 4-56% H. influenzae 12-69% M. catarrhalis 4-42% Berkovitch M., Bulkowstein M., Zhovtis D., et al.: Colonization rate of bacteria in the throat of health infants. Int J Pediatr Otorhinolaryngol 2002;63:19-24. Nilsson P., Ripa T.: Staphylococcus aureus throat colonization is more frequent than in the anterior nares. J Clin Microbiol 2006;44:3334-9. Ramirez-Ronda C., Fuxench-Lopez Z., Nevrez M.: Increased pharyngeal bacterial colonization during viral illness. Arch Intern Med 1981;141;1599-603. Principi N., Marchisio P., Schito G.C., et al.: Risk factors for carriage of respiratory pathogens in the nasopharynx of healthy children. Ascanius Project Collaborative Group. Pediatr Infect Dis J 1999;18:517-23.

Peritonsillar abscess

Acute Otitis Media Viruses Bacteria Rhinoviruses Coronaviruses Influenza and Parainfluenza Viruses Respiratory Syncitial Viruses S. Pneumoniae H. Influenzae M. catarrhalis

Acute Otitis Media

Acute Otitis Media The diagnosis of acute otitis media should be imposed on the basis of the simultaneous occurrence of acute symptoms and otoscopy picture suggestive of acute otitis media Rekomendacje postępowania w pozaszpitalnych zakażeniach układu oddechowego NPOA 2010

Acute Otitis Media

Acute Otitis Media In most cases of uncomplicated acute otitis media is recommended to apply the principle of watchful waiting without giving the antibiotic

Acute Otitis Media Acute otitis media running with pain, in the initial period should be treated with ibuprofen or paracetamol

Acute Otitis Media Immediate use of antibiotics in acute otitis media is recommended: • Children younger than 6 monts • Children with high temperature and vomiting • Children younger than 2 years of age with bilateral AOM • People with perforation

Otitis media Which antibiotic?

Acute Otitis Media

Acute Otitis Media

Acute Otitis Media Amoxycylin

Acute Sinusitis Development of the paranasal sinuses 0- maxillary and ethmoid sinuses 3 years old sphenoid sinuses 5-6 years old maxillary sinuses

Acute rhinosinusitis

Acute Sinusitis Acute sinusitis (acute rhinosinusitis) causes the cavities around nasal passages (sinuses) to become inflamed and swollen. This interferes with drainage and causes mucus to build up.

Acute Rhinosinusitis Diagnosis is made by patient’s history and physical examination Duration of symptoms over 10 days and clinical deterioration after 5 days are the most important criteria for differentiating bacterial from viral infection

Acute Rhinosinusitis It is not routinely recommended: - Microbiological testing - Imaging In case of suspicion of complications: -CT -urgent specialist consultation

Acute Sinusitis When antibiotic? severe infection intensity determined craniofacial pain and fever above 39 ° no improvement after 7-10 days worsening symptoms after initial clinical improvement the occurrence of complications

Acute Sinusitis Antibiotic of choice is amoxicillin It is recommended to treat for 10 days Adults and children weighing more than 40 kg from 1500 to 2000 mg every 12 hours.; children weighing less than 40 kg 75-90 mg / kg / day in 2 divided doses every 12 hours.

Acute Sinusitis Mild allergic reactions- rash- cephalosporins (Cefuroxime) More severe allergic reactions- anaphylaxis- macrolides (Clarithromycin, Azithromycin)

Thank you for attention!