Search

Background: During the coronavirus disease 2019 (COVID-19) pandemic in the Netherlands it was noticed that very few blood cultures from COVID-19 patients turned positive with clinically relevant bacteria. This was particularly evident in comparison to the number of positive blood cultures during previous seasonal epidemics of influenza. This observation raised questions about the occurrence and causative microorganisms of bacteraemia in COVID-19 patients, especially in the perspective of the widely reported overuse of antibiotics and the rising rate of antibiotic resistance., Methods: We conducted a retrospective cohort study on blood culture results in influenza A, influenza B and COVID-19 patients presenting to two hospitals in the Netherlands. Our main outcome consisted of the percentage of positive blood cultures. The percentage of clinically relevant blood cultures, isolated bacteria and 30-day all-cause mortality served as our secondary outcomes., Results: A total of 1331 viral episodes were analysed in 1324 patients. There was no statistically significant difference (p = 0.47) in overall occurrence of blood culture positivity in COVID-19 patients (9.0, 95% CI 6.8-11.1) in comparison to influenza A (11.4, 95% CI 7.9-14.8) and influenza B patients (10.4, 95% CI 7.1-13.7,). After correcting for the high rate of contamination, the occurrence of clinically relevant bacteraemia in COVID-19 patients amounted to 1.0% (95% CI 0.3-1.8), which was statistically significantly lower (p = 0.04) compared to influenza A patients (4.0, 95% CI 1.9-6.1) and influenza B patients (3.0, 95% CI 1.2-4.9). The most frequently identified bacterial isolates in COVID-19 patients were Escherichia coli (n = 2) and Streptococcus pneumoniae (n = 2). The overall 30-day all-cause mortality for COVID-19 patients was 28.3% (95% CI 24.9-31.7), which was statistically significantly higher (p = <.001) when compared to patients with influenza A (7.1, 95% CI 4.3-9.9) and patients with influenza B (6.4, 95% CI 3.8-9.1)., Conclusions: We report a very low occurrence of community-acquired bacteraemia amongst COVID-19 patients in comparison to influenza patients. These results reinforce current clinical guidelines on antibiotic management in COVID-19, which only advise utilization of antibiotics when a bacterial co-infection is suspected.

Objective and Background: Cognitive test performance by individuals with multiple sclerosis (MS) may be biased because of MS-related speech problems. The purpose of this study was to compare articulation and pause durations between individuals with MS and controls on cognitive tests requiring an oral response., Method: As part of a neuropsychological assessment, 41 patients with MS and 23 controls completed oral forms of 2 timed cognitive tests that are commonly used in MS. Acoustic analysis software segmented oral test responses into "articulation" and "pause" time durations., Results: Overall cognitive test performance by the patients with MS was significantly associated with average pause duration, but not average articulation duration. Articulation time did not contribute to or confound the outcome of either test., Conclusions: Articulation time did not contribute to differences in test performance between patients with MS and controls; rather, the time spent in silence between responses (pause time) largely accounted for group differences. Future research could use the methods described here to study speech characteristics during cognitive tests that require oral responses for patients with known speech impairments and more progressive forms of MS.