Fatemeh Afroughi

Abstract Introduction Patients with COVID‐19 may present different viral loads levels. However, the relationship between viral load and disease severity in COVID‐19 is still unknown. Therefore, this study aimed to systematically review the association between SARS‐CoV‐2 viral load and COVID‐19 severity. Methods The relevant studies using the keywords of “COVID‐19” and “viral load” were searched in the databases of PubMed, Scopus, Google Scholar, and Web of Science. A two‐step title/abstract screening process was carried out and the eligible studies were included in the study. Results Thirty‐four studies were included from the initial 1015 records. The vast majority of studies have utilized real‐time reverse transcription‐polymerase chain reaction of the nasopharyngeal/respiratory swabs to report viral load. Viral loads were commonly reported either as cycle threshold ( C t ) or log 10 RNA copies/ml. Conclusion The results were inconclusive about the relationship between COVID‐19 severity and viral load, as a similar number of studies either approved or opposed this hypothesis. However, the studies denote the direct relationship between older age and higher SARS‐CoV‐2 viral load, which is a known risk factor for COVID‐19 mortality. The higher viral load in older patients may serve as a mechanism for any possible relationships between COVID‐19 viral load and disease severity. There was a positive correlation between SARS‐CoV‐2 viral load and its transmissibility. Nonetheless, further studies are recommended to precisely characterize this matter.

INTRODUCTION: Several reports previously described mucormycosis co-infection in patients with COVID-19. As mucormycosis and COVID-19 co-infection might adversely affect patients' outcomes, we aimed to systematically review the related evidence and the subsequent outcomes. METHODS: We conducted a systematic review of relevant articles searching the keywords in the online databases of PubMed, Scopus, Embase, Cochrane, and Web of Science. All the records from the start of the pandemic until June 12th, 2021 underwent title/abstract and then full-text screening process, and the eligible studies were included. We did not include any language or time restrictions for the included studies. RESULTS: We found 31 eligible studies reporting 144 total cases of COVID-19 and mucormycosis co-infection. The nose, cranial sinuses, and orbital cavity were the most commonly involved organs, although the cerebrum, lungs, and heart were also involved in the studies. Pre-existing diabetes mellitus (DM), as well as corticosteroid use, were the most commonly identified risk factors, but other underlying conditions and immunomodulatory drug use were also present in several cases. Aspergillus was the most commonly reported micro-organism that caused further co-infections in patients with concurrent COVID-19 and mucormycosis. As most of the studies were case reports, no reliable estimate of the mortality rate could be made, but overall, 33.6% of the studied cases died. CONCLUSION: Early diagnosis of mucormycosis co-infection in COVID-19 patients and selecting the right treatment plan could be a challenge for physicians. Patients with underlying co-morbidities, immunocompromised patients, and those receiving corticosteroids are at higher risk of developing mucormycosis co-infection and it is crucial to have an eye examination for early signs and symptoms suggesting a fungal infection in these patients.

INTRODUCTION: Earlier studies demonstrated a decreased level of physical activity (PA) during the COVID-19 pandemic. Therefore, we aimed to systematically review the relevant studies among various age groups and explore the impact on physical and mental health. METHODS: We searched and retrieved all relevant articles using the keywords on the online databases of PubMed, Scopus, and Cochrane from the start of the pandemic until May 3rd, 2021. A two-phase screening process of identified records was carried out to shortlist the most relevant studies. First, the studies were evaluated based on their title/abstract, and then the full-text of included studies was thoroughly read. The eligible studies based on the eligibility criteria were included in this review. RESULTS: A total of 57 studies were included based on the eligibility criteria. Lockdowns and infection with SARS-CoV-2 have led to a decreased level of PA in the general population compared to the prepandemic era. Men had significantly less PA compared to women in some studies, probably due to higher pre-pandemic PA. The level of PA among those with chronic diseases also significantly diminished, putting them at a higher risk of cardiovascular incidents. Sedentary lifestyles have dominated people's life, including adolescents and university students. The increased levels of mental health issues, such as depression, anxiety, and occupational stress, have been suggested to contribute to the decreased PA. On the other hand, the decreased PA appeared to lead to more mental health issues. Fortunately, the decreasing trend of PA seemed to taper towards the end of the quarantines. CONCLUSION: Overall, the COVID-19 pandemic and subsequent quarantines reduced PA among all age groups and both sexes and had detrimental effects on people's physical and mental health. We suggest countries implement strategies to alleviate restrictions and encourage people to exercise in safe environments and prepare healthy routines for themselves.

BACKGROUND: Antimicrobial resistance (AMR) is a critical global issue, with bacteria increasingly resistant to traditional antibiotics, resulting in more treatment failures and higher mortality rates. Resistance can be defined microbiologically or clinically and arises through genetic mutations or acquired traits. In response to this growing threat, the World Health Organization (WHO) established a priority list of antibiotic-resistant bacteria in 2016 to guide the research and development of new antimicrobial agents. The COVID-19 pandemic has further exacerbated AMR, underscoring the urgent need for new antibiotics. Natural products continue to be a valuable source of antibacterial compounds and play a significant role in developing new antimicrobial treatments. METHOD: This study employed a systematic review methodology, conducting comprehensive searches across PUBMED/MEDLINE, WEB OF SCIENCE, and SCOPUS databases, adhering to modified PRISMA-ScR reporting guidelines. A research librarian assisted in developing the search strategy, with searches executed on May 5, 2024, without restrictions on publication dates. STUDY SELECTION PROCESS: Titles and abstracts were screened using Rayyan and Endnote. Inclusion criteria focused on original studies examining the antimicrobial effects of natural products against antibiotic-resistant pathogens, including risk estimates with 95% confidence intervals. The review identified significant effects of natural products on 12 families of antibiotic-resistant bacteria as reported by the World Health Organization (WHO). These findings underscore the potential of natural compounds as therapeutic agents in combating antimicrobial resistance. RESULTS: A total of 4371 articles published between 2014 and 2024 were initially identified, from which 290 articles were selected for detailed review based on their relevance to the study period. All included studies were clinical trials. The analysis indicated that most of the research on dietary plants was conducted in countries within the Middle East, South America, and Africa. Among the pathogens investigated, Pseudomonas aeruginosa, Escherichia coli, Klebsiella pneumoniae, Salmonella typhi, and Staphylococcus aureus emerged as the most frequently studied due to their involvement in a wide range of infectious diseases. The findings revealed that alkaloids, flavonoids, phenols, saponins, tannins, and terpenoids were the principal classes of plant-derived compounds exhibiting antioxidant activity against bacterial strains. These bioactive compounds were extracted using a variety of solvents, including ethanol, methanol, aqueous solutions, benzoate, ethyl acetate, n-butanol, and methanolic preparations obtained from different plant parts such as leaves, bark, flowers, and roots. Notably, flavonoids represented 24.8% of the antioxidant product derivatives examined. The overall results underscore the significant therapeutic potential of regional medicinal plants in combating pathogens resistant to chemical drugs. Their antioxidant and cytotoxic properties may enhance the efficacy of existing antibiotic classes and contribute to reversing antimicrobial resistance. CONCLUSION: Based on the findings of this review, the diverse effects and therapeutic efficacy of herbal compounds in managing antibiotic resistance were extensively examined. Consequently, in light of the demonstrated antimicrobial activities of these plant-derived compounds, further investigation into their potential as alternative agents to counteract antibiotic resistance has become increasingly essential.

Accurately orchestrated course of events normally observed in healing are not followed in diabetic wounds, and bacterial colonization/infection further messes up the process. Novel therapeutic options for treatment of infections caused by multidrug-resistant Staphylococcus aureus are urgently needed. HAMLET (human α-lactalbumin made lethal to tumor cells) has been reported to be able to sensitize bacterial pathogens to traditional antimicrobial agents. The aim was to assess the wound healing activity of curcumin nanoparticles in diabetic wounds infected with methicillin-resistant Staphylococcus aureus (MRSA) sensitized with HAMLET. Fifty male rats were randomized into 5 groups of 10 animals each. In CONTROL group, 0.1-mL sterile saline 0.9% solution was added to the wounds with no infection. In MRSA group, the wounds were infected with MRSA and only treated with 0.1-mL sterile saline 0.9% solution. In MRSA/HAMLET group, infected wounds were treated with HAMLET (100 µg). In MRSA/CNP group, animals with infected wounds were treated with 0.1 mL topical application of 1 mg/mL curcumin nanoparticles. In MRSA/CNP/HAMLET group, animals with infected wounds were treated with topical application of 0.1 mL solution of curcumin nanoparticles (1 mg/mL) and HAMLET (100 µg). All test formulations were applied for 10 days, twice a day, starting from first treatment. Microbiological examination; planimetric, biochemical, histological, and quantitative morphometric studies; immunohistochemical staining for angiogenesis; determination of hydroxyproline levels; and reverse transcription polymerase chain reaction for caspase 3, Bcl-2, and p53 showed that there was significant difference between animals in MRSA/CNP/HAMLET group compared with other groups ( P < .05). Curcumin nanoparticles improved diabetic wounds infected with MRSA sensitized with HAMLET and had the potential to offer more attention to this safer agent for topical use in infected diabetic wounds.