A bstract Introduction Coronavirus disease-2019 (COVID-19) infection can result in pulmonary complications ranging from mild illness to severe life-threatening disease. There are limited studies correlating the association between the clinical course of COVID-19 and histopathological findings. This study aimed to examine the postmortem histopathological changes in lung tissue of COVID-19-positive patients and to correlate those changes with disease severity. Materials and methods This prospective observational study was conducted in adult COVID-19-positive patients. Postmortem core needle biopsy (CNB) of the lung was done using ultrasonography guidance within 1 hour of death. Histopathological analyses were performed by two expert pulmonary pathologists. The demographic and clinical data of the patients were recorded to correlate them with histopathological findings. Results In total, 48 patients were assessed for inclusion, and 21 patient relatives consented for the study. The median duration of illness was 21 (range 9–38) days, the predominant histopathological finding was diffuse alveolar damage (DAD) in most patients (19/21), followed by pneumonia (13/21). Exudative, intermediate, and advanced DAD patterns were seen in 9.5%, 52.4%, and 28.6% of cases, respectively. Advanced DAD was associated with a longer duration of disease. The pneumonia findings were associated with positive respiratory and blood cultures. The microvascular thrombus was seen only in one patient. Conclusion The predominant pathological findings in our patients were DAD and pneumonia. The DAD type correlated with the duration of illness, and we attributed pneumonia findings to secondary infection. The incidence of microvascular thrombi was low, and it might reflect the effect of treatment with anticoagulation. How to cite this article Maddani SS, Rao R, Deepa HC, Noronha AK, Chaudhuri S, Vishwas P. Pathological Lung Patterns of COVID-19 and its Clinical Correlation to Disease Severity. Indian J Crit Care Med 2022;26(12):1285–1292.
Hypervirulent Klebsiella pneumoniae infection, reported commonly from South-east Asia, is predominantly community-acquired and affects young healthy adults. Although abscesses of liver, brain and muscles, endophthalmitis or osteomyelitis have been reported, Infective endocarditis is a rare manifestation. This report illustrates a patient with uncontrolled diabetes mellitus who presented with clinical features of liver abscess with an incidental finding of infective endocarditis. Hypervirulent K. pneumoniae, which was isolated from blood culture of the patient carried the plasmid borne key virulence markers- rmpA and rmpA2 with enterobactin ( entB), type 3 fimbriae ( mrkD) and was of K1 type and ST3321, an uncommon clone of Hypervirulent K. pneumoniae. Transthoracic Echocardiography showed multiple mobile vegetations attached to mitral valve and posterior wall of left ventricle. With appropriate antibiotics blood cultures turned sterile, liver abscess and cardiac vegetations reduced in size. Mitral Valve replacement surgery was proposed. He declined treatment and succumbed to the infection subsequently.
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