Assessment of the levels of some prognostic biomolecules (galectins, ACE2, SCUBE1/2/3) in COVID-19 patients

Aim: Our aim was to investigate the differences between healthy people and COVID-19 patients in terms of some immunological biomolecules, especially including those related to the inflammation process. Materials & methods: A total of 180 participants (90 healthy controls and 90 COVID-19 patients) were included. The expression levels of eight different inflammation-related biomolecules were measured by the ELISA technique. Results: The mean levels of ACE2, ANG1-7, GAL3, GAL9, SCUBE1, SCUBE2 and SCUBE3 were elevated in COVID-19 patients when compared with healthy controls, while the mean level of GAL2 was lower in COVID-19 patients than controls. Conclusion: To understand the cytokine storm mechanism and related parameters, more detailed studies should be performed investigating more related biomolecules and related signaling pathways.

The effectiveness of inactivated SARS-CoV-2 vaccine (CoronaVac) on antibody response in participants aged 65 years and older

In this study, it was aimed to determine the antibody responses after the two doses of inactivated severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) vaccinations in people who were above 65 years old and to evaluate the factors affecting this response. A total of 235 participants aged 65 years and older were included. Blood samples were taken and data about age, gender, comorbid diseases, and presence of side effects after vaccination were noted. Anti-SARS-CoV-2 QuantiVac ELISA (IgG) test kit (catalogue number: EI-2606-9601-10-G, Euroimmun) was used. The mean age was 70.38 ± 4.76. Approximately 120 of 235 participants had at least one comorbid disease. The mean levels of anti-SARS-CoV-2 IgG antibody after 4 weeks from the first and second doses of vaccine were 37.70 ± 57.08 IU/ml, and 194.61 ± 174.88 IU/ml, respectively. Additionally, 134 of 235 participants (57.02%) had under 25.6 IU/ml antibody level (negative) after 4 weeks from the first vaccine dose while this rate was 11.48% (n = 27) after 4 weeks from the second vaccine dose. The 19 (70.4%) participants who had under had 25.6 IU/ml antibody level after 4 weeks from the first dose of vaccine had at least one comorbid disease including diabetes mellitus, and 8 (29.6%) participants had no comorbid disease (F = 2.352, p = 0.006). Lower rates of antibody response were detected in participants aged 65 years and older and those with comorbidities both in our study and similar studies in the current literature. Further studies should evaluate whether the low antibody titers are really associated with age and comorbidities or not. Finally, prospective studies are needed to determine how long the immunity provided by SARS-CoV-2 vaccines will continue.

Molecular characterization, phylogenetic and variation analyses of SARS-CoV-2 strains in Turkey

Aims: We present the sequence and single-nucleotide polymorphism (SNP) analysis for 47 complete genomes for SARS-CoV-2 isolates on Turkish patients. Methods: The Illumina MiSeq platform was used for sequencing the libraries. The SNPs were detected by using Genome Analysis Toolkit – HaplotypeCaller v.3.8.0 and were inspected on GenomeBrowse v2.1.2. Results: All viral genome sequences of our isolates were located in lineage B under the different clusters, such as B.1 (n = 3), B.1.1 (n = 28) and B.1.9 (n = 16). According to the Global Initiative on Sharing All Influenza Data nomenclature, all of our complete genomes were placed in G, GR and GH clades. In our study, 549 total and 53 unique SNPs were detected. Conclusion: The results indicate that the SARS-CoV-2 sequences of our isolates have great similarity with all Turkish and European sequences.

Prevalence of COVID-19 in 10,000 samples from 7853 patients in Eastern Turkey by positive real-time PCR

Aim:

COVID-19, caused by SARS-CoV-2, started in December 2019 and has spread across the world.

Materials & methods:

We analyzed real-time PCR results of 10,000 samples from 2 April to 30 May 2020 in three neighbor cities located in the East of Turkey. The final study population was 7853 cases, after excluding screening tests.

Results:

Real-time PCR was performed to detect the SARS-CoV-2-specific RNA-dependent-RNA-polymerase gene fragment. The number of total positive samples out of 7853 were 487; however, the number of nonrepeating positive patient was 373 (4.8%). Cough and fever were the most common symptoms in positive cases.

Conclusion:

Epidemiologic studies should be performed about the prevalence of SARS-CoV-2 infection to better understand the effect of the virus across the world.

Device-associated infection rates and bacterial resistance in the intensive care units of a Turkish referral hospital

OBJECTIVE

To determine device-associated infection (DAI) rates, and the microbiological and antibiotic resistance profiles of infecting pathogens in our hospital.

METHODS

Prospective surveillance of healthcare-associated infections was performed from January 2007 to March 2010 in 4 different intensive care units (ICUs) of SB Diskapi Yildirim Beyazit Training and Research Hospital, Ankara, Turkey.

RESULTS

During the study period, 6,005 patients were followed-up in ICUs for a total of 46,355 patient-days. The total number of DAIs was 969. Catheter-associated urinary tract infection (CAUTI) was the most common DAI (55.3% of DAIs; 11.9 cases per 1000 catheter-days), followed by ventilator-associated pneumonia (VAP) (38.9% of DAIs; 21.2 cases per 1000 ventilator-days), and central line-associated blood stream infection (CLABSI) (5.8% of DAIs; 2.8 cases per 1000 central line-days). The most frequently isolated pathogens in patients with VAP were Acinetobacter species (24.5%) and Escherichia coli in CAUTI (24.2%). Coagulase negative Staphylococci and Candida species were the leading pathogens in patients with CLABSI.

CONCLUSION

We observed considerably high rates of VAP and CAUTI and a high rate of CLABSI in our ICUs when compared with the National Healthcare Safety Network data. These findings emphasize the need to improve infection control practices and management of invasive device use in our hospital.

Clinical characteristics of 74 pandemic H1N1 influenza patients from Turkey. Risk factors for fatality

OBJECTIVE

To evaluate the clinical characteristics and certain risk factors that may be associated with fatal outcome in patients with H1N1 influenza.

METHODS

This retrospective study was conducted between October and December 2009 in the Department of Infectious Diseases and Clinical Microbiology, SB Diskapi Yildirim Beyazit Training and Research Hospital, Ankara, Turkey. Data regarding the epidemiological and clinical characteristics of 74 hospitalized cases of confirmed pandemic H1N1 influenza were reviewed.

RESULTS

The median age was 49 (18-83) years, and 34 (46%) were males. The most common symptom and signs on admission were cough (91.9%) and fever more than 38 degrees Centigrade (71.7%). More than two-thirds of patients (68.9%) had at least one underlying condition; most frequently chronic respiratory disease, including asthma and diabetes. Seventy-seven percent had evidence of pneumonia on their chest x-rays at presentation. Of the 74 cases, 16 (21.6%) were followed up in the Intensive Care Unit, and 10 (13.5%) died. Obesity and oxygen saturation below 92% at the time of admission were found to be significantly related with fatal outcome. In addition, fatal patients had significantly higher levels of alanine aminotransferase (ALT), aspartate aminotransferase (AST), lactate dehydrogenase (LDH), urea, creatinine, d-dimer on admission and prothrombin time (PT), activated partial thromboplastin time, and the international normalized ratio (INR) was longer.

CONCLUSION

Timely identification and management of patients with higher risk for fatality may improve outcomes.