Abstract Background: Dengue fever continues to spread worldwide, particularly in tropical regions. Some patients with dengue fever may progress to severe dengue, which is associated with significantly higher morbidity and mortality. Despite this, no definitive treatment has been found to prevent its progression. Montelukast, a leukotriene receptor antagonist, has shown potential in reducing plasma leakage, a key factor in the pathophysiology of severe dengue. Therefore, this study aimed to evaluate the effectiveness of montelukast in reducing the risk of severe dengue. Methods: A systematic literature search was conducted on April 16, 2025, using keywords related to montelukast and dengue across four databases, which included PubMed, Taylor and Francis, Cochrane Library, and ScienceDirect. A critical appraisal was performed using the Oxford Centre for Evidence-Based Medicine framework, evaluating the validity, importance, and applicability of each study. The primary outcomes were the incidence of dengue shock syndrome and dengue with warning signs. The secondary outcomes included mortality rate and hospitalization duration. Results: This study included three studies involving a total of 1057 patients. Montelukast is associated with a reduced incidence of dengue shock syndrome and shorter duration of hospitalization. However, the effect of montelukast on dengue with warning signs and mortality rate was inconclusive. Conclusion: Montelukast shows potential as an adjuvant therapy in preventing the progression of dengue fever to severe dengue. However, further research is required before montelukast can be widely recommended for dengue fever patients in daily clinical practice and possibly integrated into dengue fever clinical guidelines.
evidence-based case report ; severe dengue ; dengue fever ; leukotriene receptor antagonist ; montelukast

Introduction: Severe thyrotoxicosis is an endocrine emergency that may present with multiorgan dysfunction, particularly when precipitated by systemic infection. Management becomes challenging when hepatic injury limits the use of standard antithyroid therapy. We report a case of severe thyrotoxicosis with acute hepatitis in the setting of dengue IgM positivity. Case: A 44-year-old male with chronic alcohol use presented with epistaxis. On examination, he was deeply jaundiced and had tremors on outstretched hands. Initial investigations showed severe hepatitis with AST 2029 U/L, ALT 698 U/L, total bilirubin 236 µmol/L, alkaline phosphatase 138 U/L, and thrombocytopenia (34 ×10⁹/L). Viral hepatitis HBV, HCV, HIV, and autoimmune hepatitis screen were negative. Dengue IgM was positive. Thyroid function tests demonstrated overt thyrotoxicosis with free thyroxine 4 (FT4) 58.6 pmol/L and suppressed thyroid-stimulating hormone. He was managed as severe thyrotoxicosis with impending thyroid crisis in view of systemic illness and multiorgan involvement. Due to significant hepatic dysfunction, he was treated with propranolol, dexamethasone, and lithium carbonate 300 mg BD. Over 5 days, there was marked clinical improvement with resolution of tachycardia and tremors. FT4 decreased to 44.8 pmol/L. Liver function tests improved significantly (AST 157 U/L, ALT 195 U/L, bilirubin 163 µmol/L), and thrombocytopenia resolved (platelets 323 ×10⁹/L). He remained hemodynamically stable with normal Glasgow Coma Scale throughout admission. Conclusion This case highlights severe thyrotoxicosis with acute hepatitis and dengue infection, where management was complicated by contraindication to conventional antithyroid therapy. Lithium and corticosteroids provided effective biochemical and clinical improvement. Early recognition and individualized therapy are crucial in complex multisystem thyrotoxic presentations.
Hepatitis A ; Thyrotoxicosis ; Dengue

OBJECTIVE

Dengue remains a critical public health concern in the Philippines. Late consultation and delayed presentation of dengue patients to hospitals constantly challenge doctors. This study aimed to identify factors contributing to late consultation of dengue patients.

This analytic, cross-sectional study examined patient, parental, socioeconomic, cultural, and health system factors influencing delayed consultation among parents of patients 0 – 18 years at Batangas Medical Center and Lipa Medix Medical Center. A total of 668 parents were enrolled. Descriptive statistics and frequency tables summarized the key characteristics. Test of proportions assessed differences between groups. Univariate logistic regression screened possible predictors, followed by multiple logistic regression to identify significant factors.

Univariate analysis identified significant predictors of late consultation, including older patient age(p=0.002), residence >50 km from the hospital (p 50 km from the hospital were 2.7 times more likely to consult late (p=0.01).

Delayed consultation was influenced by the patient age, hospital type, geographic distance from the hospital, maternal marital status, and cultural beliefs in home remedies and faith healing. Strategies to improve early consultation should consider these factors.

OBJECTIVE

To determine whether neutrophil-to-lymphocyte ratio (NLR) and platelet-to-lymphocyte ratio (PLR) within the first three days of dengue illness are independent predictors of dengue severity among pediatric patients.

A cross-sectional analytical retrospective study was conducted among pediatric dengue patients admitted to The Medical City, Pasig from September 2021 to August 2024. Data collection was done through electronic chart review. Baseline characteristics were analyzed using the Kruskal-Wallis test, Chi-Square test, and Fisher’s exact test. Receiver Operating Characteristic (ROC) and Area Under the Curve (AUC) analyses, along with diagnostic performance metrics, were used to evaluate daily ratio cut-offs differentiating dengue classifications. Multivariable logistic regression was performed to assess NLR and PLR as independent predictors of warning signs or severe dengue development.

Among the 316 subjects included in the analysis, 40.5% had dengue fever without warning signs, 57.3% had dengue fever with warning signs, and 2.2% had severe dengue. Differentiating patients without warning signs from those with warning signs, the NLR cut-offs were 4.73, 2.07, and 2.5 on days 1-3, respectively, whereas from those with severe dengue, the cut-offs were 1.27, 0.68, and 0.47 on the same days. For this pairwise analysis, PLR cut-offs were 170, 233.92, and 208.79 for the first comparison; and 209.24, 244.12, and 187.5 for the second, respectively. Statistical analysis showed poor discrimination and diagnostic performance for all cut-offs. Likewise, multivariable linear regression revealed no significant correlation between either ratio and dengue severity.

NLR and PLR within the first three days of dengue illness revealed poor performance in predicting the development of warning signs or progression to severe dengue among pediatric patients.

OBJECTIVE: This study reports the first imported case of Lassa fever (LF) in China. Laboratory detection and molecular epidemiological analysis of the Lassa virus (LASV) from this case offer valuable insights for the prevention and control of LF. METHODS: Samples of cerebrospinal fluid (CSF), blood, urine, saliva, and environmental materials were collected from the patient and their close contacts for LASV nucleotide detection. Whole-genome sequencing was performed on positive samples to analyze the genetic characteristics of the virus. RESULTS: LASV was detected in the patient's CSF, blood, and urine, while all samples from close contacts and the environment tested negative. The virus belongs to the lineage IV strain and shares the highest homology with strains from Sierra Leone. The variability in the glycoprotein complex (GPC) among different strains ranged from 3.9% to 15.1%, higher than previously reported for the seven known lineages. Amino acid mutation analysis revealed multiple mutations within the GPC immunogenic epitopes, increasing strain diversity and potentially impacting immune response. CONCLUSION The case was confirmed through nucleotide detection, with no evidence of secondary transmission or viral spread. The LASV strain identified belongs to lineage IV, with broader GPC variability than previously reported. Mutations in the immune-related sites of GPC may affect immune responses, necessitating heightened vigilance regarding the virus.
Humans ; China/epidemiology* ; Genome, Viral ; Lassa Fever/virology* ; Lassa virus/classification* ; Molecular Epidemiology ; Phylogeny

The Ebola virus (EBOV), a member of the Filoviridae family, is a highly pathogenic agent responsible for severe hemorrhagic fever in humans. Understanding the molecular mechanisms governing its replication is critical for developing effective antiviral strategies. VP35-TurboID immunosuppression coupled with quantitative mass spectrometry identified Septin9, the host GTP-binding protein which played a role in cytoskeletal regulation, as a novel interactor of VP35. Western blotting and Far-Western blotting confirmed the direct interaction and demonstrated that the C-terminal region of VP35 was the critical binding domain. Functionally, EBOV replication as well as the formation of viral inclusion bodies (VIBs) was demonstrated to be significantly suppressed by Septin9 knockdown and depletion, as shown by the EBOV minigenome (EBOV MG) and the transcription- and replication-competent virus-like particles (trVLPs) system. This study reveals that VP35 engages in a specific interaction with the GTP-binding protein Septin9, thereby impeding EBOV replication through the disruption of inclusion bodies. The overarching objective of this study is to significantly enhance our understanding about the pathogenic mechanism of EBOV and offer a robust theoretical foundation and solid empirical support for the formulation of innovative therapeutic strategies against EBOV.
Virus Replication/physiology* ; Septins/physiology* ; Humans ; Ebolavirus/physiology* ; Inclusion Bodies, Viral/metabolism* ; Viral Regulatory and Accessory Proteins/metabolism* ; Hemorrhagic Fever, Ebola/virology*

OBJECTIVE

To describe a case of dengue-associated bilateral neuroretinitis in a young female adult.

This is a case report.

A 25-year-old female was referred for evaluation of bilateral blurring of vision during the convalescent stage of dengue fever. Visual acuity was 20/80 in each eye. Fundoscopy showed mild optic disc swelling, macular thickening, and hard exudates bilaterally. Dengue-associated neuroretinitis was considered. Intravenous methylprednisolone treatment for three days resulted in significant improvements in visual function and resolution of fundus abnormalities.

Dengue is a potential etiology of neuroretinitis in endemic areas, especially in those who develop visual symptoms during the convalescent phase. Prompt recognition and treatment may prevent long-term visual impairment.

Humans ; Dengue/epidemiology* ; Child ; Dengue Virus/isolation & purification* ; China/epidemiology* ; Consensus

Mosquito-borne viruses, including dengue virus (DENV), chikungunya virus (CHIKV), and Zika virus (ZIKV), pose major threats to public health in tropical and subtropical regions worldwide. Neonates are particularly vulnerable, and the associated disease burden has drawn increasing attention. Routes of neonatal infection include vertical mother-to-child transmission (transplacental and peripartum) and postnatal mosquito bites. Clinical manifestations are often nonspecific; a proportion of cases may progress to central nervous system infection, hemorrhagic disease, or long-term neurodevelopmental impairment, with serious consequences for survival and quality of life. Although China has issued prevention and control guidelines for adults and pregnant women, systematic clinical guidance tailored to neonates remains lacking. In response, the Perinatal Group of the Pediatric Branch of the Chinese Medical Doctor Association convened a multidisciplinary panel to develop this expert consensus, integrating the latest international evidence with China's practical prevention and control experience. The consensus addresses epidemiology; the effects of maternal infection on fetuses and neonates; clinical manifestations; diagnosis and differential diagnosis; early warning indicators of severe disease; therapeutic strategies and supportive care; and prevention and maternal-infant management. It aims to provide evidence-based, standardized, and practical guidance for frontline clinicians managing neonatal mosquito-borne viral infections.
Humans ; Zika Virus Infection/therapy* ; Infant, Newborn ; Chikungunya Fever/therapy* ; Dengue/prevention & control* ; Female ; Pregnancy ; Consensus

OBJECTIVE

To present the case of a 17-year-old girl who was readmitted post-tonsillectomy due to dengue fever, hematemesis and late tonsillar bleeding three weeks after the surgery.

Design:Case Report

Setting:Tertiary Government Training Hospital

Patient: One

A previously healthy 17-year-old Filipino girl underwent uncomplicated elective tonsillectomy for chronic hypertrophic tonsillitis. Twenty days post-operatively, she developed fever, thrombocytopenia and massive hematemesis. Despite intensive care management for severe dengue fever with concurrent late post-tonsillectomy bleeding, the patient died from hemorrhagic shock on post-operative day 21.

This appears to be the first reported case of concurrent late post-tonsillectomy hemorrhage and dengue fever in a previously healthy adolescent girl. In dengue-endemic areas, post-tonsillectomy patients should be counseled about dengue prevention and advised to seek medical attention for persistent fever. Early recognition and management of this potentially fatal combination is crucial for improving patient outcomes.