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Purpose: To analyze the presence of severe acute respiratory syndrome coronavirus 2 (SARS?CoV?2) in tears/conjunctival epithelium and assess the cytomorphological changes in the conjunctival epithelium of coronavirus disease 2019 (COVID?19) patients. Methods: In this pilot study, patients with moderate to severe COVID?19 were recruited from the COVID ward/intensive care unit of the institute. Tears and conjunctival swabs were collected from COVID?19 patients and sent to the virology laboratory for reverse transcription polymerase chain reaction (RT?PCR) testing. Conjunctival swabs were used to prepare smears, which underwent cytological evaluation and immunocytochemistry for SARS?CoV?2 nucleocapsid protein. Results: Forty?two patients were included. The mean age of participants was 48.61 (range: 5–75) years. Seven (16.6%) patients tested positive for SARS?CoV?2 ribonucleic acid in tears samples, four (9.5%) of which were positive on conjunctival swab by RT?PCR in the first test. Cytomorphological changes were observed significantly more in smears from patients with positive RT?PCR on tear samples, including bi?/multi?nucleation (p = 0.01), chromatin clearing (p = 0.02), and intra?nuclear inclusions (p < 0.001). One case (3.2%) showed immunopositivity for SARS?CoV?2; this patient had severe disease and the lowest Ct values for tear and conjunctival samples among all positive cases. Conclusion: Conjunctival smears from patients with COVID?19 revealed cytomorphological alterations, even in the absence of clinically significant ocular infection. However, viral proteins were demonstrated within epithelial cells only rarely, suggesting that although the conjunctival epithelium may serve as a portal for entry, viral replication is possibly rare or short?lived.
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Background: To limit the emergence and spread of antibiotic resistance, adjustments in the antibiotic regimen should be done according to the results of blood cultures as soon as they are available. This study was planned to determine the effect of blood culture and sensitivity tests on the antibiotics use in ICU patients of a tertiary care teaching hospital. Methods: This chart review retrospective study was carried out in ICU patients of a tertiary care teaching hospital. The data was collected from patients’ medical record file in a case record form which included patient’s demographic details, provisional diagnosis/or diagnosis, blood culture reports, and antimicrobial treatment (both the empiric treatment as well as the change made after the release of the blood culture results). The effect of blood culture results on antibiotic treatment was analysed. Results: A total of 245 patients were subjected to blood culture during the period of 6 months with an average of 40.8/month. 86 (35.1%) patients showed positive blood culture results, while 159 (64.9%) patients showed negative blood culture results. 55 patients discharged after the release of blood culture and sensitivity results. Antibiotic regimens were modified or changed in 26 (47.27%), and in 29 (52.72%) there was no modification. Most commonly used antibiotic after blood culture reports were meropenem (34.62%) followed by 11.54% of each teicoplanin, piperacillin+ tazobactum and tigecyclin. Conclusions: Blood culture reports help in management of critically ill patients if bacteria are resistant to previously used antibiotic, but do not help in narrowing the therapy in ICU patients.