2022
DOI: 10.3389/fendo.2022.919223
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Respiratory Tract Infections in Diabetes – Lessons From Tuberculosis and Influenza to Guide Understanding of COVID-19 Severity

Abstract: Patients with type-2 diabetes (T2D) are more likely to develop severe respiratory tract infections. Such susceptibility has gained increasing attention since the global spread of Coronavirus Disease 2019 (COVID-19) in early 2020. The earliest reports marked T2D as an important risk-factor for severe forms of disease and mortality across all adult age groups. Several mechanisms have been proposed for this increased susceptibility, including pre-existing immune dysfunction, a lack of metabolic flexibility due to… Show more

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Cited by 25 publications
(18 citation statements)
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“…Among pulmonary tuberculosis patients con rmed to have COVID- diabetes mellitus is an important risk factor that increases the risk of disease severity and mortality. This may be due to increased susceptibility, including preexisting immune dysfunction, lack of metabolic exibility due to insulin resistance, genetic factors, inadequate quality of diet or adverse interactions with antidiabetic medications or common comorbidities [21].…”
Section: Resultsmentioning
confidence: 99%
“…Among pulmonary tuberculosis patients con rmed to have COVID- diabetes mellitus is an important risk factor that increases the risk of disease severity and mortality. This may be due to increased susceptibility, including preexisting immune dysfunction, lack of metabolic exibility due to insulin resistance, genetic factors, inadequate quality of diet or adverse interactions with antidiabetic medications or common comorbidities [21].…”
Section: Resultsmentioning
confidence: 99%
“…o Between December 2020 to February 2021 (5) o Between March to May, 2021 (6) o June to August, 2021 (7) o September to November, 2021 (…”
Section: Supplementarymentioning
confidence: 99%
“…We now know that the polymorphism of ACE2, the genes that regulate ACE2 expression and affinity to SARS-CoV-2, and that sex affect the susceptibility to COVID-19 (for example, [1][2][3][4][5]). Pre-existing conditions such as obesity and type 2 diabetes [5,6] as well as age [5] have also been found to affect vulnerability. Another key point that also emerged from previous studies was the geographical difference in the number of cases around the world.…”
Section: Introductionmentioning
confidence: 99%
“…Diabetes, a major metabolic disorder, is one of the leading causes of mortality and morbidity throughout the world [ 12 ]. Several studies have shown that diabetics infected with Influenza A (H1N1), MERS-CoV, and SARS-CoV exhibit severe disease symptoms and succumb to death compared to non-diabetic individuals [ 13 , 14 , 15 ]. Similarly, infection with SARS-CoV-2 is also associated with severe complications in diabetics.…”
Section: Introductionmentioning
confidence: 99%