Acute Pyelonephritis Epidemiology Forecast 2026-2035

Acute pyelonephritis is a severe bacterial infection of the kidneys and a significant contributor to the global burden of urinary tract infections. According to Jesús Redondo-Sánchez et al. (2025), it accounts for 5.5% of all UTIs treated in primary care and 14%-52% of hospital admissions for UTIs. As per acute pyelonephritis epidemiology forecast, the disease burden is expected to remain substantial due to increasing UTI incidence worldwide.

Acute Pyelonephritis Epidemiology Forecast Report Coverage

The analyst's “Acute Pyelonephritis Epidemiology Forecast Report 2026-2035” offers comprehensive information on the prevalence and demographics of acute pyelonephritis. It projects the future incidence and prevalence rates of acute pyelonephritis cases across various populations. The study covers age, gender, and type as major determinants of the acute pyelonephritis population. The report highlights patterns in the prevalence of acute pyelonephritis over time and projects future trends based on multiple variables.

The report provides a comprehensive overview of the disease, as well as historical and projected data on the epidemiology of acute pyelonephritis in the 8 major markets.

Regions Covered

• The United States
• Germany
• France
• Italy
• Spain
• The United Kingdom
• Japan
• India

Acute Pyelonephritis Understanding: Disease Overview

Acute pyelonephritis is a sudden and severe bacterial infection of the kidneys that typically arises from an ascending urinary tract infection. The condition commonly occurs when bacteria, most often Escherichia coli, spread from the bladder to the renal pelvis and kidney tissues. It causes inflammation that can impair kidney function if untreated. Symptoms frequently include high fever, flank pain, nausea, vomiting, and painful urination. Acute pyelonephritis may occur as uncomplicated or complicated forms, depending on underlying factors such as urinary tract obstruction, kidney stones, pregnancy, diabetes, or structural abnormalities of the urinary tract.

Acute Pyelonephritis Epidemiology Perspective

The acute pyelonephritis epidemiology division offers information on the patient pool from history to the present as well as the projected trend for each of the 8 major markets. The analyst provides both current and predicted trends for the acute pyelonephritis epidemiology scenario by examining a wide range of studies. Additionally, the report covers the diagnosed patient pool for acute pyelonephritis and their trends. The data is broken down into specific categories, such as total prevalent cases in males and females, and total diagnosed cases across different age groups and patient pools.

• According to BLK-Max Super Speciality Hospital, acute pyelonephritis occurs significantly more often in females than males, with annual rates of 15-17 cases per 10,000 females compared with 3-4 cases per 10,000 males, reflecting a clear gender disparity.
• As per Jesús Redondo-Sánchez et al., 2025, 24,888 acute pyelonephritis cases were recorded between 2009 and 2018, with an overall incidence of 4.2 cases per 10,000 person-years, declining from 4.9 to 3.6 during the study period.
• According to Jesús Redondo-Sánchez et al., 2025, approximately 72.5% of cases occurred in women aged 18-64 years, indicating the highest incidence in young and middle-aged females, while men showed higher rates in those aged 65 years or older.
• As per Rehana Hikman Ud Din et al., 2026, hospitalized acute pyelonephritis cases showed a median patient age of 41 years, with higher disease incidence among females; however, acute kidney injury complications occurred more frequently in males.
• According to Duresa Abu et al., 2021, about 40% of pregnant women with untreated asymptomatic bacteriuria may develop pyelonephritis, highlighting pregnancy as a key epidemiological risk factor associated with adverse maternal and neonatal outcomes.

Country-wise Acute Pyelonephritis Epidemiology

The acute pyelonephritis epidemiology data and findings for the United States, Germany, Spain, Italy, France, the United Kingdom, Japan, and India are also provided in the epidemiology section.

The epidemiology of acute pyelonephritis varies across major healthcare regions but reflects a substantial clinical burden. According to Sayato Fukui et al., 2022, approximately 250,000 cases of acute pyelonephritis are diagnosed annually in the United States, leading to over 100,000 hospitalizations each year. In Japan, according to Ai Yamamoto et al., 2023, hospitalization incidence for urinary tract infections, including pyelonephritis, is reported at 6.8 per 10,000 men and 12.4 per 10,000 women, with an in-hospital mortality rate of 4.5%. Comparable healthcare systems in United Kingdom, Germany, France, Spain, Italy, and India also report notable hospitalization rates, reflecting the continued epidemiological significance of acute pyelonephritis across developed and emerging healthcare markets.

Acute Pyelonephritis: Treatment Overview

Treatment of acute pyelonephritis primarily involves prompt antibiotic therapy to eliminate the underlying bacterial infection. Oral antibiotics are commonly prescribed for mild to moderate cases, while severe infections may require intravenous antibiotics and hospitalization. Commonly used antibiotic classes include fluoroquinolones, cephalosporins, and beta-lactam antibiotics. Supportive care, such as adequate hydration, pain management, and antipyretic medications, helps relieve symptoms. In complicated cases caused by urinary obstruction, kidney stones, or structural abnormalities, medical procedures or surgical interventions may be required to restore urine flow and prevent recurrent infections or kidney damage.

Key Questions Answered

• What are the key findings of acute pyelonephritis epidemiology in the 8 major markets?
• What will be the total number of patients with acute pyelonephritis across the 8 major markets during the forecast period?
• What was the country-wise acute pyelonephritis epidemiology scenario in the 8 major markets in the historical period?
• Which country will have the highest number of acute pyelonephritis patients during the forecast period of 2026-2035?
• Which key factors would influence the shift in the patient population of acute pyelonephritis during the forecast period of 2026-2035?
• What are the currently available treatments for acute pyelonephritis?
• What are the disease risks, signs, symptoms, and unmet needs of acute pyelonephritis?

Scope of the Acute Pyelonephritis Epidemiology Report

• The report covers a detailed analysis of signs and symptoms, causes, risk factors, pathophysiology, diagnosis, treatment options, and classification/types of acute pyelonephritis based on several factors.
• Acute Pyelonephritis Epidemiology Forecast Report covers data for the eight major markets (the US, France, Germany, Italy, Spain, the UK, Japan, and India).
• The acute pyelonephritis report helps to identify the patient population, and the unmet needs are highlighted along with an assessment of the disease's risk and burden.