Related Experiment Video
Updated: Jul 22, 2026
14:44
Isolation of mRNAs Associated with Yeast Mitochondria to Study Mechanisms of Localized Translation
Published on: March 14, 2014
13.4K
Seasonality of tuberculosis in Israel, 2001-2011
I Margalit1, C Block2, Z Mor3
1The Hebrew University-Hadassah Medical School, Jerusalem.
Summary
Tuberculosis (TB) incidence in Israel shows seasonal patterns, peaking in spring and lowest in fall. Vitamin D levels may explain this seasonality, with higher incidence in areas with more sunlight suggesting vulnerability to deficiency.
Area of Science:
- Epidemiology
- Environmental Health
- Immunology
Background:
- Studies suggest tuberculosis (TB) incidence fluctuates seasonally.
- Understanding TB seasonality is crucial for public health interventions.
Purpose of the Study:
- To investigate the seasonal patterns of TB in Israel.
- To explore potential links between TB incidence and climatic factors, including vitamin D levels.
Main Methods:
- Analysis of laboratory-confirmed TB cases in Israel from 2001-2011.
- Correlation of TB incidence with average temperature, ultraviolet radiation, and mean serum 25-hydroxyvitamin D levels.
Main Results:
- TB incidence peaked in spring and was lowest in fall (5.1% case proportion amplitude).
- A significant correlation was observed between mean population 25-hydroxyvitamin D levels and the seasonal disease pattern.
- Southern Israel, with high global radiation, paradoxically showed the highest TB incidence.
Conclusions:
- Tuberculosis in Israel exhibits a distinct seasonal pattern, mirroring findings from other regions.
- Vitamin D deficiency is a potential explanatory factor for the observed seasonality.
- High TB incidence in high-radiation areas suggests a population vulnerability to vitamin D deficiency.
Related Concept Videos
01:29Pulmonary Tuberculosis I
Tuberculosis, often called TB, is a contagious illness primarily caused by Mycobacterium tuberculosis. It mainly affects the lung parenchyma but can also impact other body parts.
Causative Organism
The primary infectious agent causing tuberculosis is Mycobacterium tuberculosis, a slow-growing, acid-fast, aerobic rod that exhibits sensitivity to heat and ultraviolet light. Instances of Mycobacterium bovis and Mycobacterium avium contributing to the development of TB infection are rare.
Mode of...
Causative Organism
The primary infectious agent causing tuberculosis is Mycobacterium tuberculosis, a slow-growing, acid-fast, aerobic rod that exhibits sensitivity to heat and ultraviolet light. Instances of Mycobacterium bovis and Mycobacterium avium contributing to the development of TB infection are rare.
Mode of...
01:28Pulmonary Tuberculosis II
Tuberculosis, or TB, is a bacterial infectious disease caused by Mycobacterium tuberculosis. While its primary impact is on the lungs, leading to pulmonary tuberculosis, it can also affect various other organs, a condition referred to as extrapulmonary tuberculosis.
Here is a detailed explanation of its pathophysiology:
Transmission: The process begins when a person inhales droplet nuclei containing M. tuberculosis. These are typically released into the air when an individual with pulmonary or...
Here is a detailed explanation of its pathophysiology:
Transmission: The process begins when a person inhales droplet nuclei containing M. tuberculosis. These are typically released into the air when an individual with pulmonary or...
01:31Pulmonary Tuberculosis III
Tuberculosis (TB) is a contagious infection primarily affecting the lung parenchyma but which can also affect other body parts. TB can be classified based on disease development, presentation, and the affected anatomical site.
The first classification is based on the development of the disease, and it includes the following categories:
The first classification is based on the development of the disease, and it includes the following categories:
01:26Pulmonary Tuberculosis IV
Tuberculosis, more commonly referred to as TB, is an infectious disease stemming from Mycobacterium tuberculosis. While it primarily impacts the lungs, TB can also affect other body areas. Given its severity and global impact, timely and accurate diagnosis is crucial for controlling its spread and improving patient outcomes.
Several diagnostic approaches are used to detect TB. The conventional method is the Tuberculin Skin Test (TST), also known as the Mantoux test. However, this method has...
Several diagnostic approaches are used to detect TB. The conventional method is the Tuberculin Skin Test (TST), also known as the Mantoux test. However, this method has...
01:28Pulmonary Tuberculosis V
Medical management of tuberculosis (TB) patients involves a comprehensive approach that includes diagnosis, treatment, and monitoring. The specific strategies can vary depending on the type of tuberculosis (latent or active), the patient's overall health status, and other considerations.
Latent tuberculosis infection occurs when TB bacteria are present in a person's body, but are not causing illness or symptoms. It is not contagious, and preventive treatment is crucial to avoid the progression...
Latent tuberculosis infection occurs when TB bacteria are present in a person's body, but are not causing illness or symptoms. It is not contagious, and preventive treatment is crucial to avoid the progression...
01:23Tuberculosis
Tuberculosis (TB) remains a significant global health concern, primarily targeting the lungs and spreading through airborne transmission. Infection begins when aerosolized droplet nuclei, expelled by an individual with active TB, are inhaled by another person. These microscopic particles carry Mycobacterium tuberculosis, the causative agent of TB. Upon reaching the alveoli, the bacilli are engulfed by alveolar macrophages. However, due to their specialized lipid-rich cell wall, these pathogens...