A recent prospective study published in the Indian Journal of Nephrology in January 2026 reveals that 30% of hospitalized dengue patients develop kidney complications, drastically driving their mortality rate to 27.5% compared to a mere 2.5% in those with spared renal function.
Dengue viral infection (DVI) globally causes massive clinical illness, with previously scattered retrospective data estimating acute kidney injury (AKI) rates anywhere from 0.9% to 69.4%; however, the distinct lack of specific prospective evidence prompted Avichal Rajpal, Mohan Kumar Hanumanthappa, and their colleagues from the Post Graduate Institute of Medical Education and Research, Chandigarh, to prospectively assess the true incidence of renal involvement and its direct correlation with patient morbidity and mortality.
Therefore, the prospective, single-center observational study evaluated 170 hospitalized patients (over 12 years old) with severe dengue or warning signs between July 2022 and September 2023 to determine the incidence of renal involvement. Secondary outcomes focused on mortality correlations and progression to chronic kidney disease (CKD). Using clinical examinations, ultrasonography, and routine urine microscopy, researchers thoroughly analyzed the data while specifically excluding patients with pre-existing renal, hepatic, or cardiac diseases or other unconfirmed tropical illnesses.
Key clinical findings of the study include:
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Elevated Incidence: Remarkably, the study observed that 51 out of 170 patients (30%) developed clinical or microscopic renal abnormalities, with 36 individuals (21.17%) experiencing overt AKI during their hospitalization.
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Mortality Surge: Investigators highlighted a dramatically elevated mortality rate, showing a 27.5% fatality occurrence in patients with kidney involvement versus a mere 2.5% in those without.
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Dialysis Requirement: Clinicians reported that out of the ten patients who rapidly progressed to Stage 3 kidney disease, seven unfortunately required kidney replacement therapy (KRT), which significantly complicated their overall recovery trajectory.
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Crucial Predictors: Analysis identified that patients concurrently presenting with altered sensorium and elevated serum lactate levels served as robust, independent clinical predictors for developing severe renal complications.
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Pathological Insights: Biopsies revealed that severe cases experiencing critical multi-organ damage exhibited acute tubular injury specifically paired with both hemoglobin and pigment cast nephropathy.
The results suggest that renal involvement acts as a highly prevalent complication in DVI that substantially drives up patient mortality, with approximately 36.1% of those developing AKI succumbing to the illness compared to the overall 10% baseline cohort mortality. These compelling critical figures firmly emphasize that proactive kidney evaluation is absolutely paramount for patient survival.
Thus, the study concludes that emergency healthcare providers might benefit from routinely evaluating and closely monitoring renal function in all presenting dengue patients to assist with accurate prognostication and optimized therapeutic management.
Although the single-center design, potential referral bias due to disease severity, and a relatively limited biopsy scope present acknowledged limitations, it gently points to the need for subsequent multi-center studies utilizing advanced electron microscopy to better grasp the complex underlying disease mechanisms.
Reference
Rajpal A, Hanumanthappa MK, Sethi J, Ratho RK, Pannu AK, Rajendran M, et al. Incidence, Risk Factors and Outcome of Renal Involvement in Patients with Dengue Viral Infection. Indian J Nephrol. 2026;36:91-7.