Background: The impact of antimicrobial resistance on clinical outcomes in patients with lower respiratory tract infection in primary care is largely unknown.
Aim: To determine the illness course of infections with resistant bacteria in adults presenting to primary care with acute cough.
Design And Setting: Secondary analysis of a multicentre European trial in primary care.
Method: A total of 2061 adults with acute cough (lasting ≤28 days) were recruited from primary care and randomised to amoxicillin or placebo. To reflect the natural course of disease, only patients in the placebo group ( = 1021) were eligible. Nasopharyngeal flocked swabs and/or sputa (when available) were analysed at baseline and and isolates underwent susceptibility testing. Patients recorded their symptoms in a diary every day for 4 weeks. Patients with and without resistant bacterial infection were compared with regards to symptom severity, duration of symptoms, worsening of illness, and duration of interference with normal activities or work.
Results: Of the 834 patients with diary records, 104 showed and/or infection. Of this number, 54 (52%) were resistant to antibiotics, while seven (7%) were resistant to penicillin. For the duration of symptoms rated 'moderately bad or worse' (hazard ratio 1.27, 95% confidence interval [CI] = 0.67 to 2.44), mean symptom severity (difference -0.48, 95% CI = -1.17 to 0.21), and worsening of illness (odds ratio 0.31, 95% CI = 0.07 to 1.41), there was no statistically significant difference between the antibiotic-resistant and antibiotic-sensitive groups.
Conclusion: The illness course of antibiotic-resistant lower respiratory tract infection does not differ from that caused by antibiotic-sensitive bacteria.
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| http://dx.doi.org/10.3399/bjgp18X698333 | DOI Listing |
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