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Background: The coronavirus disease 2019 (COVID-19) pandemic has caused a global health crisis and it might have affected healthcare-associated infections (HAI) prevention strategies. This study aims to evaluate the impact of the COVID-19 pandemic on HAI incidence in Brazilian ICUs. Methods: This ecological study compared adult patients admitted to the ICU from April through June 2020 (pandemic period) with the same period in 2019 (pre-pandemic period). We collected data from 21 hospitals from the three most populated Brazilian regions. The difference in microbiologically confirmed central line-associated bloodstream infection (CLABSI) and ventilator-associated pneumonia (VAP) incidence density, and the proportion of organisms that caused HAI between the pandemic and the pre-pandemic periods were compared in a pairwise analysis using the Wilcoxon signed rank sum test. Findings: We observed a significant increase in CLABSI incidence during the pandemic (2.81 [1.35 - 6.89] vs. 1.60 [0.44 - 4.20], p = 0.002). Overall, there was no difference in VAP incidence between the two periods, but there was an increase in VAP incidence in private hospitals during the pandemic (3.65 [1.42 - 6.57] vs. 2.54 [0 - 3.98], p = 0.033). In addition, there was a significant increase in the proportion of CLABSI caused by Enterococcus faecalis and candida species during the pandemic. Interpretation: There was an increase in CLABSI incidence in Brazilian hospitals during the COVID-19 pandemic. Additionally, we observed an increase in the proportion of CLABSI caused by E. faecalis and candida species in this period. Funding: None. Declaration of Interests: None. Ethics Approval Statement: The study protocol 77243517.8 was approved by the ethics committee of each participating hospital.

BackgroundDespite most cases not requiring hospital care, there are limited community-based clinical data on COVID-19.MethodsThe Corona São Caetano programme is a primary care initiative providing care to all residents with COVID-19 in São Caetano do Sul, Brazil. It was designed to capture standardised clinical data on community COVID-19 cases. After triage of potentially severe cases, consecutive patients presenting to a multimedia screening platform between 13 April and 13 May 2020 were tested at home with SARS-CoV-2 reverse transcriptase (RT) PCR; positive patients were followed up for 14 days with phone calls every 2 days. RT-PCR-negative patients were offered additional SARS-CoV-2 serology testing to establish their infection status. We describe the clinical, virological and natural history features of this prospective population-based cohort.FindingsOf 2073 suspected COVID-19 cases, 1583 (76.4%) were tested by RT-PCR, of whom 444 (28.0%, 95% CI 25.9 to 30.3) were positive; 604/1136 (53%) RT-PCR-negative patients underwent serology, of whom 52 (8.6%) tested SARS-CoV-2 seropositive. The most common symptoms of confirmed COVID-19 were cough, fatigue, myalgia and headache; whereas self-reported fever (OR 3.0, 95% CI 2.4 to 3.9), anosmia (OR 3.3, 95% CI 2.6 to 4.4) and ageusia (OR 2.9, 95% CI 2.3 to 3.8) were most strongly associated with a positive COVID-19 diagnosis by RT-PCR or serology. RT-PCR cycle thresholds were lower in men, older patients, those with fever and arthralgia and closer to symptom onset. The rates of hospitalisation and death among 444 RT-PCR-positive cases were 6.7% and 0.7%, respectively, with older age and obesity more frequent in the hospitalised group.ConclusionCOVID-19 presents in a similar way to other mild community-acquired respiratory diseases, but the presence of fever, anosmia and ageusia can assist the specific diagnosis. Most patients recovered without requiring hospitalisation with a low fatality rate compared with other hospital-based studies.

OBJECTIVE To evaluate the performance of post mortem laboratory analysis in identifying the causes of hemorrhagic fever and/or neuroinvasive disease in deaths by arbovirus infection. METHODS Retrospective cross-sectional study based on the differential analysis and final outcome obtained in patients whose samples underwent laboratory testing for arboviruses at the Pathology Center of the Adolfo Lutz Institute, in São Paulo, Brazil. RESULTS Of the 1355 adults clinically diagnosed with hemorrhagic fever and/or neuroinvasive disease, the most commonly attributed cause of death and the most common final outcome was dengue fever. Almost half of the samples tested negative on all laboratory tests conducted. CONCLUSION The failure to identify the causative agent in a great number of cases highlights a gap in the diagnosis of deaths of unknown etiology. Additional immunohistochemical and molecular assessments need to be added to the post-mortem protocol if all laboratory evaluations performed fail to identify a causative agent. While part of our findings may be due to technical issues related to sample fixation, better information availability when making the initial diagnosis is crucial. Including molecular approaches might lead to a significant advancement in diagnostic accuracy.