Clinico-epidemiological presentations and management of Nipah virus infection during the outbreak in Kozhikode district, Kerala state, India 2023.

India experienced its sixth Nipah virus (NiV) outbreak in September 2023 in the Kozhikode district of Kerala state. The NiV is primarily transmitted by spillover events from infected bats followed by human-to-human transmission. The clinical specimens were screened using real-time RT-PCR, and positive specimens were further characterized using next-generation sequencing. We describe here an in-depth clinical presentation and management of NiV-confirmed cases and outbreak containment activities. The current outbreak reported a total of six cases with two deaths, with a case fatality ratio of 33.33%. The cases had a mixed presentation of acute respiratory distress syndrome and encephalitis syndrome. Fever was a persistent presentation in all the cases. The Nipah viral RNA was detected in clinical specimens until the post-onset day of illness (POD) 14, with viral load in the range of 1.7-3.3 × 104 viral RNA copies/mL. The genomic analysis showed that the sequences from the current outbreak clustered into the Indian clade similar to the 2018 and 2019 outbreaks. This study highlights the vigilance of the health system to detect and effectively manage the clustering of cases with clinical presentations similar to NiV, which led to early detection and containment activities.

Profile of COVID-19 breakthrough cases and its comparison with unvaccinated COVID-19 cases among healthcare workers in a tertiary care centre in North Kerala.

Background: Healthcare workers (HCWs) were the most vulnerable group during COVID-19 pandemic and had faced many challenges including high rate of breakthrough infections. Aims: To study the incidence of reported breakthrough infections among HCWs in Government Medical College, Kozhikode and to compare profile of COVID-19 infection between fully vaccinated and unvaccinated COVID-19 positive HCWs. Settings and Design: The research was conducted as a prospective study for a duration of 78 weeks from 1st of March 2020 through 31st of August 2021 in Government Medical College, Kozhikode. Methods and Material: The study was conducted among HCWs in a COVID-19 tertiary care institute. Real-time data were collected from 401 breakthrough cases and 390 unvaccinated COVID-19 positive HCWs through telephonic interviews. Statistical Analysis Used: Univariate analysis was done using frequency for categorical variables and mean and standard deviation for quantitative variables. Chi-square test was used to find out statistical significance. Results: Incidence of breakthrough infection was found to be 5.62% with 43.3% being asymptomatic. Fever was the most predominant symptom (62.5%). None of the breakthrough cases developed complication requiring intensive care (ICU). There was a reduction in incidence of acute post-COVID-19 syndrome in vaccinated group (17.45%) compared to unvaccinated group (57.2%). Conclusions: COVID-19 vaccination plays a key role in preventing severity, complication, and ICU admissions in COVID-19 infection. Incidence of post-COVID-19 syndrome is also less among fully vaccinated compared to unvaccinated individuals.

The Sociodemographic Profile of Community-Dwelling Older Adults With Serious Mental Illness in Kerala - A Cross-Sectional Study.

Background: Older adults with serious mental illness (OASMI) have to manage the twin challenges of old age and mental illness. Understanding their characteristics will help policymakers and researchers plan tailored interventions. The profile of OASMI is not described in any publication from India, and this paper addresses that gap. The information from this study will serve as a baseline for the planned periodic follow-up of the study participants. Methods: This study employed a cross- sectional design among a sample of OASMI identified through multistage cluster sampling from three districts in Kerala. We interviewed them in their households and collected sociodemographic data using a pretested tool. Results: Among the 917 OASMI participants, 66% were females, 18% were the 'oldest-old' (≥80 years), 94.1% were unemployed, 51.7% were socially backward, 68.5% were financially weak, 10.1% were living alone, 59.4% were living without partners, and 63.7% had caregivers. Conclusion: Compared to the general population of older adults in Kerala, the OASMI have poorer socioeconomic status and higher rates of social isolation, and males are dying earlier. The profile of the OASMI depicts their multiple vulnerabilities and the need to address those.

Prevalence of anaemia and associated factors among antenatal women in rural Kozhikode, Kerala.

Context: Anemia in pregnancy is a significant public health concern with detrimental aftereffects on maternal and fetal well-being universally, especially in developing countries like India. Aims: To estimate the prevalence of anemia in pregnant women in rural areas of Kozhikode by hemoglobin estimation and to study the selected factors associated with anemia. Settings and Design: A cross-sectional study was conducted among 295 antenatal women in all three trimesters residing in six selected panchayats of Kozhikode district from July 2016 to March 2017. Materials and Methods: The cluster sampling method was followed. Data were obtained from antenatal women, applying a pretested semi-structured questionnaire. Hemoglobin estimation was done using the Humacount 30TS automated hematology analyzer. Statistical Analysis Used: Data were analyzed using SPSS 18 software. Results: The prevalence of anemia was 40%. Of this, 30.5% had mild anemia and 9.5% had moderate anemia. There were no cases of severe anemia. The prevalence was more in the second trimester. Factors such as excess menstrual blood loss prior to present pregnancy, early age at first delivery, trimester, and parity were found to be significantly associated with anemia. Conclusion: Anemia continues to be a serious public health problem. Health system should pay more attention on different factors that contribute to anemia, and planners should formulate an apt policy and implement necessary changes in existing programs.

COVID-19 infection among health care workers in a tertiary care teaching hospital in Kerala - India.

Health care workers are at the frontline for management and containment of COVID-19 infection which has put them at additional risk of the disease. Infection and subsequent quarantine of contacts among HCW may produce considerable strain on the health care system. It is essential that we study the modes by which HCW may get infected in the work environment. Methods: All HCW testing positive for SARS COV 2 from 1st March 2020 to 31st Jan 2021 were included in the study. Data regarding possible source of infection, details of symptoms along with demographic details were collected. Results: A total of 390 health-care workers tested positive for SARS CoV-2 in the institution. The mean age of affected health-care workers was 32.82 (±10.6) years (range 20-65 years), and 61.3% were female 33% of the positive HCW were doctors and 19.5% nurses. 29% of the infections occurred during patient care of which majority were from the non-COVID areas of the hospital. Interactions with infected colleagues constituted 27.4% of the infections. Symptomatics constituted 67% and the predominant symptoms included Fever, myalgia and severe headache. 57.2% of those followed up reported persistence of symptoms, commonly fatigue (53%), dyspnea on exertion (48%) and myalgia (18%). Conclusion and Recommendation: Infection control practices in non-COVID areas of the hospital needs to be stepped up. Adherence to masking and personal protection during clinical interactions and with colleagues needs to be maintained. Physical distancing at workplace and during mealtimes needs to be ensured by the system.

The Research Protocol of SENIOR Project-Psychiatric Services and Support System for Serious Mental Illness in Old Age, Kerala, India.

BACKGROUND: India has the second-largest population of elderly in the world. Serious mental illness (SMI) is a subset of the mental disorders that result in significant functional impairment and is usually long term. Persons with SMI face several challenges in their old age that are different from the issues faced by younger people with SMI. Understanding the problems faced by elderly individuals suffering from SMI is fundamental for planning programs to address them. The SENIOR (Support Systems Evaluation of Neuropsychiatric Illness in Old age) project is a study aimed at evaluating the problems faced in obtaining mental health care by elderly persons having SMI in the Kerala state of India. AIM: To describe the scientific methodology of the SENIOR project. METHODS: This study employs mixed-methods cross-sectional design among a minimum sample of 768 SMI patients identified through cluster sampling from three districts, and Focus Group Discussion among mental health program officials. DISCUSSION: This paper presents a methodological model to assist researchers in future field epidemiological studies on mental illness. Assessing service needs and barriers to access for the most vulnerable among the mentally ill will help the policymakers make evidence-based decisions to improve their quality of life.

Nipah Virus Infection in Kozhikode, Kerala, South India, in 2018: Epidemiology of an Outbreak of an Emerging Disease.

BACKGROUND: An outbreak of the rare and highly pathogenic Nipah virus infection occurred in Kozhikode, Kerala, India, during May 2018. METHODOLOGY: Outbreak control activities included laboratory case confirmation and isolation. Contact surveillance was initiated and close contacts were home quarantined for the maximum incubation period of the disease. Field visits and verbal autopsy of the deaths were done to elicit the details of exposure. RESULTS: Of the 18 confirmed cases, 16 succumbed (case fatality rate, 88.8%). The mean incubation period was 9 days. The transmission was person to person wherein the primary case served as a point source for 15 other cases including 2 health-care workers. The mean age of the affected cases was 41 years with male preponderance. More than 2600 contacts were under surveillance. The outbreak was contained within 3 weeks and declared closed by July the same year. CONCLUSION: Early detection of the outbreak and prompt isolation of cases along with strengthening of infection control practices and barrier nursing helped in containing the outbreak.

Diagnostic delay and associated factors among patients with pulmonary tuberculosis in Kerala.

INTRODUCTION: Delay in the diagnosis of tuberculosis (TB) can lead to an increased infectivity period, delayed treatment, and increased severity of the disease. The objective of this study was to estimate the diagnostic delay and factors associated with the delay in diagnosis among the newly diagnosed smear-positive pulmonary TB patients in Kerala, India. MATERIALS AND METHODS: A cross-sectional study was conducted among TB patients who were in the intensive phase of directly observed treatment short-course treatment in four randomly selected TB units in a district in Kerala during the years 2012-2013. Diagnostic delay was defined as the delay between the onset of symptoms and diagnosis. Data collection using a modified World Health Organization questionnaire was done by interviewing 302 participants. RESULTS: Mean age of the participants was 48.6 ± 14.5 years. Males constituted 76.5% of the study population. The mean diagnostic delay was 43.5 ± 29.1 days (median: 37 days). The median patient and health system delays were 16 days and 15 days, respectively. Patient delay (55.6%) contributed more than health system delay (44.4%). Poor knowledge about TB, first consulting a private physician, and increased number of consultations were found to be significantly associated with diagnostic delay. CONCLUSION: The diagnostic delay in tuberculosis reported in this study was lower than other studies in India but it needs further reduction. Both patients and health providers play a role in a delay in diagnosis, and poor knowledge about the disease among the patients was one of the main risk factors. Interventions to improve knowledge and awareness of the disease and to increase the suspicion of chest symptomatic by health-care providers in the private sector are vital to reduce diagnostic delay.

Adipogenic Mesenchymal Stromal Cells from Bone Marrow and Their Hematopoietic Supportive Role: Towards Understanding the Permissive Marrow Microenvironment in Acute Myeloid Leukemia.

PURPOSE: The role of bone marrow-derived mesenchymal stem/stromal cells (MSCs) in creating a permissive microenvironment that supports the emergence and progression of acute myeloid leukemia (AML) is not well established. We investigated the extent to which adipogenic differentiation in normal MSCs alters hematopoietic supportive capacity and we undertook an in-depth comparative study of human bone marrow MSCs derived from newly diagnosed AML patients and healthy donors, including an assessment of adipogenic differentiation capacity. FINDINGS: MSCs from healthy controls with partial induction of adipogenic differentiation, in comparison to MSCs undergoing partial osteogenic differentiation, expressed increased levels of hematopoietic factors and induced greater proliferation, decreased quiescence and reduced in vitro hematopoietic colony forming capacity of CD34(+) hematopoietic stem and progenitor cells (HSPCs). Moreover, we observed that AML-derived MSCs had markedly increased adipogenic potential and delayed osteogenic differentiation, while maintaining normal morphology and viability. AML-derived MSCs, however, possessed reduced proliferative capacity and decreased frequency of subendothelial quiescent MSCs compared to controls. CONCLUSION: Our results support the notion of a bone marrow microenvironment characterized by increased propensity toward adipogenesis in AML, which may negatively impact normal hematopoiesis. Larger confirmatory studies are needed to understand the impact of various clinical factors. Novel leukemia treatments aimed at normalizing bone marrow niches may enhance the competitive advantage of normal hematopoietic progenitors over leukemia cells.

Small-Molecule Ice Recrystallization Inhibitors Improve the Post-Thaw Function of Hematopoietic Stem and Progenitor Cells.

The success of hematopoietic stem cell transplantation depends in part on the number and the quality of cells transplanted. Cryoinjuries during freezing and thawing reduce the ability of hematopoietic stem and progenitor cells (HSPCs) to proliferate and differentiate after thawing. Up to 20% of the patients undergoing umbilical cord blood (UCB) transplant experience delayed or failed engraftment, likely because of the inadequate hematopoietic potency of the unit. Therefore, the optimization of cryopreservation protocols, with an emphasis on the preservation of HSPCs, is an important issue. Current protocols typically utilize a 10% dimethyl sulfoxide cryoprotectant solution. This solution ensures 70-80% post-thaw cell viability by diluting intracellular solutes and maintaining the cell volume during cryopreservation. However, this solution fails to fully protect HSPCs, resulting in the loss of potency. Therefore, a new class of cryoprotectants (N-aryl-d-aldonamides) was designed and assessed for the ability to inhibit ice recrystallization and to protect HSPCs against cryoinjury. Several highly active ice recrystallization inhibitors were discovered. When used as additives to the conventional cryoprotectant solution, these nontoxic small molecules improved the preservation of functionally divergent hematopoietic progenitors in the colony-forming unit and long-term culture-initiating cell assays. By contrast, structurally similar compounds that did not inhibit ice recrystallization failed to improve the post-thaw recovery of myeloid progenitors. Together, these results demonstrate that the supplementation of cryopreservation solution with compounds capable of controlling ice recrystallization increases the post-thaw function and potency of HSPCs in UCB. This increase may translate into reduced risk of engraftment failure and allow for greater use of cryopreserved cord blood units.

Mesenchymal stromal cells from patients with acute myeloid leukemia have altered capacity to expand differentiated hematopoietic progenitors.

The bone marrow microenvironment may be permissive to the emergence and progression of acute myeloid leukemia (AML). Studying interactions between the microenvironment and leukemia cells should provide new insight for therapeutic advances. Mesenchymal stromal cells (MSCs) are central to the maintenance of the hematopoietic niche. Here we compared the functions and gene expression patterns of MSCs derived from bone marrow aspirates of healthy donors and patients with AML. MSCs expanded from AML patients had heterogeneous morphology and displayed a wide range of proliferation capacity compared to MSCs from healthy controls. The ability of AML-MSCs to support the expansion of committed hematopoietic progenitors from umbilical cord blood-derived CD34+ cells may be impaired while the expression of genes associated with maintaining hematopoietic quiescence appeared to be increased in AML-MSCs compared to healthy donors. These results highlight important potential differences in the biologic profile of MSCs from AML patients compared to healthy donors that may contribute to the emergence or progression of leukemia.