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1.
J Psychiatry Neurosci ; 46(2): E232-E237, 2021 03 11.
Article in English | MEDLINE | ID: covidwho-1127808

ABSTRACT

Background: Monitoring of white cell counts during clozapine treatment leads to cessation of therapy if levels fall below predetermined values. Reductions in white cell counts, driven by lower levels of lymphocytes, have been observed with coronavirus disease 2019 (COVID-19). Neutropenia during COVID-19 has not been reported. We present data for 56 patients who were taking clozapine and had COVID-19. Methods: We included patients who were taking clozapine at the time they tested positive for COVID-19. We compared absolute neutrophil counts, lymphocyte counts and white cell counts between baseline and the first week of infection, and baseline and the second week of infection. Results: We observed reductions in absolute neutrophil counts (p = 0.005), lymphocyte counts (p = 0.003) and white cell counts (p < 0.001) between baseline and the first 7 days of COVID-19. All cell counts had returned to baseline levels by days 8 to 14. Six patients experienced neutropenia (absolute neutrophil counts < 2.0 × 109/L) and of those, 4 underwent mandatory cessation of clozapine. For 3 patients, clozapine treatment had been established for more than 6 months with no previous neutropenia, neutrophil levels returned to baseline within 2 weeks and no further neutropenia was observed on restarting treatment. Limitations: This was a retrospective chart review; larger cohorts are required. Clozapine plasma levels were largely not measured by clinicians. Conclusion: These data strongly suggest that mild neutropenia in the acute phase of COVID-19 in patients who are well established on clozapine is more likely to be a consequence of the virus than of clozapine treatment.


Subject(s)
Antipsychotic Agents/adverse effects , Clozapine/adverse effects , Neutropenia/etiology , Psychotic Disorders/drug therapy , Schizophrenia/drug therapy , Adult , Aged , Aged, 80 and over , Antipsychotic Agents/therapeutic use , Clozapine/therapeutic use , Female , Humans , Leukocyte Count , Leukopenia/etiology , Lymphocyte Count , Lymphopenia/etiology , Male , Middle Aged , Neutropenia/chemically induced , Neutrophils , Retrospective Studies , Young Adult
2.
Ann Clin Lab Sci ; 50(3): 299-307, 2020 May.
Article in English | MEDLINE | ID: covidwho-614688

ABSTRACT

OBJECTIVE: An outbreak of pneumonia named COVID-19 caused by a novel coronavirus in Wuhan is rapidly spreading worldwide. The objective of the present study was to clarify further the clinical characteristics and blood parameters in COVID-19 patients. MATERIALS AND METHODS: Twenty-three suspected patients and 64 patients with laboratory-confirmed SARS-Cov-2 infection were admitted to a designated hospital. Epidemiological, clinical, laboratory, and treatment data were collected and analyzed. RESULTS: Of the 64 patients studied, 47 (73.4%) had been exposed to a confirmed source of COVID-19 transmission. On admission, the most common symptoms were fever (75%) and cough (76.6%). Twenty-eight (43.8%) COVID-19 patients showed leukopenia, 10 (15.6%) showed lymphopenia, 47 (73.4%) and 41 (64.1%) had elevated high-sensitivity C-reactive protein (hsCRP) and erythrocyte sedimentation rate (ESR), respectively, and 30 (46.9%) had increased fibrinogen concentration. After the treatment, the counts of white blood cells and platelets, and the level of prealbumin increased significantly, while aspartate aminotransferase (AST), lactate dehydrogenase (LDH), and hsCRP decreased. COVID-19 patients with the hospital stay longer than 12 days had higher body mass index (BMI) and increased levels of AST, LDH, fibrinogen, hsCRP, and ESR. CONCLUSIONS: Results of blood tests have potential clinical value in COVID-19 patients.


Subject(s)
Betacoronavirus/isolation & purification , Biomarkers/blood , Coronavirus Infections/complications , Cough/diagnosis , Fever/diagnosis , Leukopenia/diagnosis , Lymphopenia/diagnosis , Pneumonia, Viral/complications , Adult , Coronavirus Infections/virology , Cough/blood , Cough/etiology , Female , Fever/blood , Fever/etiology , Humans , Leukopenia/blood , Leukopenia/etiology , Lymphopenia/blood , Lymphopenia/etiology , Male , Middle Aged , Pandemics , Pneumonia, Viral/virology , Prognosis
3.
Ann Hematol ; 99(6): 1205-1208, 2020 Jun.
Article in English | MEDLINE | ID: covidwho-60295

ABSTRACT

Since December 2019, a novel coronavirus has spread throughout China and across the world, causing a continuous increase in confirmed cases within a short period of time. Some studies reported cases of thrombocytopenia, but hardly any studies mentioned how the virus causes thrombocytopenia. We propose several mechanisms by which coronavirus disease 2019 causes thrombocytopenia to better understand this disease and provide more clinical treatment options.


Subject(s)
Betacoronavirus , Coronavirus Infections/complications , Pneumonia, Viral/complications , Thrombocytopenia/etiology , Coronavirus Infections/blood , Coronavirus Infections/drug therapy , Coronavirus Infections/therapy , Humans , Leukopenia/etiology , Pandemics , Pneumonia, Viral/blood , Pneumonia, Viral/therapy , Thrombocytopenia/therapy , Thrombopoiesis
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