Related Experiment Video
Updated: Jan 24, 2026
09:47
A Standardized Procedure for Monitoring Harmful Algal Blooms in Chile by Metabarcoding Analysis
Published on: August 26, 2021
6.1K
[Hansen disease, an emergent condition in Chile]
Álvaro San-Martín1, Cristián Carrasco1, Alberto Fica1
1Hospital Base de Valdivia, Valdivia, Chile.
Summary
Hansen's disease (HD), a chronic infection affecting skin and nerves, is emerging in Chile due to migration. Early diagnosis and molecular tools are crucial for managing this condition in the migrant population.
Area of Science:
- Infectious Diseases
- Microbiology
- Epidemiology
Background:
- Hansen's disease (HD), caused by Mycobacterium leprae, is a chronic infectious disease primarily affecting the skin and peripheral nerves.
- HD is an emergent infection in Chile, with cases linked to recent migration waves.
Observation:
- A case report details a migrant worker from Haiti presenting with skin lesions, hypoesthesia, and unilateral madarosis.
- Diagnosis was confirmed as multibacillary Hansen's disease through clinical findings, skin smear, biopsy, and molecular amplification of M. leprae genes (rpoB, hsp65).
Findings:
- The patient received a one-year WHO standard combined regimen for multibacillary HD, resulting in partial regression of skin lesions.
- PCR detected M. leprae in nasopharyngeal samples, with rpoB gene copies decreasing over six months of therapy.
- Notifiable disease data indicate an increase in HD cases, predominantly among the migrant population in Chile.
Implications:
- Hansen's disease represents a newly recognized condition in Chile, necessitating increased clinical awareness among healthcare providers.
- Molecular diagnostic tools, such as PCR, can aid in the diagnosis and monitoring of Hansen's disease.
- The findings highlight the importance of surveillance and management strategies for infectious diseases in mobile populations.
More Related Videos
Related Concept Videos
01:27Emerging Adulthood
649
Jeffrey Arnett's concept of emerging adulthood offers a framework to understand the unique developmental stage between adolescence and full-fledged adulthood, generally from ages 18 to 25. This period is marked by extensive exploration and shifts in identity, relationships, and career choices, a process known in psychology as role experimentation. Emerging adulthood reflects the evolving cultural expectations surrounding adulthood and the dynamic process of personal transformation during...
649
01:30Introduction Cardiac Emergencies
316
Cardiac emergencies are critical situations involving the heart that require immediate medical intervention to prevent severe complications or death. These emergencies often arise from underlying heart conditions that impair the heart's ability to function correctly.Types of Cardiac EmergenciesThe most common types of cardiac emergencies include Acute Coronary Syndrome (ACS), myocardial infarction (MI), cardiac arrest, and heart failure.Acute Coronary Syndrome (ACS)Acute Coronary Syndrome (ACS)...
316
01:29Applications of GIS: Disaster Management and Emergency Response
488
Geographic Information System (GIS) technology is essential for risk identification, action prioritization, and resource optimization in critical situations like flooding and earthquakes. By integrating spatial and demographic data, GIS provides a comprehensive framework for emergency response.GIS integrates data layers, like rainfall intensity, topography, elevation profiles, and river levels, to model high-risk flood zones. These layers assess areas susceptible to flooding based on their...
488
02:06Conditions on Early Earth
100.9K
Around 4 billion years ago, oceans began to condense on earth while volcanic eruptions released nitrogen, carbon dioxide, methane, ammonia, and hydrogen into the primordial atmosphere. However, organisms with the characteristics of life were not initially present on earth. Scientists have used experimentation to determine how organisms evolved that could grow, reproduce, and maintain an internal environment.
100.9K
01:18Classical Conditioning
2.1K
Associative learning, a core principle in behavioral psychology, involves forming connections between events and facilitating learned responses. This concept is vividly illustrated by classical conditioning, a process extensively studied by the Russian physiologist Ivan Pavlov. Pavlov's pioneering research on dogs' digestive systems led to the discovery that behaviors can be learned through association, laying the groundwork for classical conditioning.
Ivan Pavlov observed that dogs...
Ivan Pavlov observed that dogs...
2.1K
01:28Conditions of Equilibrium
2.1K
Equilibrium refers to a state where a rigid body is not subjected to any translational or rotational motion. This state is achieved when the force and couple acting on a rigid body equal zero. When the system of external forces results in a net effect equivalent to zero, the rigid body is considered to be in equilibrium.
Internal forces are not considered for conditions of equilibrium because they occur in equal and opposite pairs within the body, effectively canceling each other. As a result,...
Internal forces are not considered for conditions of equilibrium because they occur in equal and opposite pairs within the body, effectively canceling each other. As a result,...
2.1K