Related Experiment Video
Updated: Jul 17, 2026
07:39
Induction of Acute Skeletal Muscle Regeneration by Cardiotoxin Injection
Published on: January 1, 2017
[Generalized tetanus in a teenager]
1Service de réanimation pédiatrique, hôpital Debrousse, CHU de Lyon, 29 rue Soeur-Bouvier, 69005 Lyon, France. frederic.valla@chu-lyon.fr
Summary
Tetanus remains a severe disease despite vaccination efforts. This case highlights the critical need for widespread tetanus vaccination, especially in children whose families refuse immunization due to personal beliefs.
Area of Science:
- Infectious Diseases
- Immunology
- Public Health
Background:
- Tetanus is a preventable bacterial infection caused by Clostridium tetani.
- Vaccination has significantly reduced tetanus incidence in industrialized nations.
- Despite widespread vaccination, tetanus remains a public health concern.
Observation:
- A case of generalized tetanus in a vaccinated adolescent is presented.
- The patient experienced a severe illness requiring extensive intensive care.
- The outcome was favorable, but the recovery was prolonged.
Findings:
- Tetanus, though rare, presents with significant morbidity even with vaccination.
- Pediatric tetanus cases are predominantly observed in unvaccinated children.
- Refusal of vaccination, often due to philosophical or religious reasons, is a key factor in pediatric tetanus cases.
Implications:
- Tetanus vaccination is crucial for preventing severe morbidity and mortality.
- Public health initiatives must address vaccine hesitancy and refusal.
- Continued vigilance and vaccination campaigns are essential to maintain tetanus control.
Related Concept Videos
01:29Tetanus
Tetanus is a life-threatening neurological disorder characterized by persistent muscle contractions and spastic paralysis. It is caused by Clostridium tetani, a motile, Gram-positive, rod-shaped, obligate anaerobe. These bacteria produce terminal endospores, giving them a distinctive “lollipop” or “tennis-racket” appearance. They thrive in anaerobic environments, such as those found in deep puncture wounds.Once introduced into the body, the spores germinate into vegetative cells. These cells...
01:28Diphtheria
Diphtheria is an acute, toxin-mediated infectious disease that primarily affects the upper respiratory tract. It is caused by Corynebacterium diphtheriae, a Gram-positive, pleomorphic rod that lacks spore-forming capability and exhibits a characteristic club-shaped morphology under microscopic examination. While C. diphtheriae can asymptomatically colonize mucosal surfaces, clinical disease manifests only when the bacterial strain is lysogenized by a specific β-corynephage. This phage...
01:22Botulism
Botulism is a life-threatening neuroparalytic condition caused by botulinum neurotoxin, which is produced by the bacterium Clostridium botulinum, a Gram-positive, spore-forming, obligate anaerobe.In adults, the toxin enters the body in different ways: in foodborne botulism, the preformed toxin is absorbed in the intestine. In wound botulism, spores grow in injured tissue and release the toxin into the blood. Infant botulism differs mechanistically from adult forms. In infants, botulism commonly...
01:22Muscle Stimulation Frequency
The contraction strength of muscles is regulated by motor neurons, which modulate the frequency of action potentials dispatched to the motor units based on the body's requirements. This process of varying the muscle stimulation frequency allows muscles to contract with a force that is precisely tailored to the needs of the moment, whether lifting a feather or a heavy box.
Wave summation
At low firing rates, motor neurons induce individual twitch contractions in muscle fibers. These twitches...
Wave summation
At low firing rates, motor neurons induce individual twitch contractions in muscle fibers. These twitches...
01:26Directly Acting Muscle Relaxants: Dantrolene and Botulinum Toxin
Directly acting muscle relaxants like dantrolene and botulinum toxin (BoNT) have distinct mechanisms and applications. Dantrolene, a hydantoin derivative, acts on the ryanodine receptor (RYR1) in skeletal muscle cells. RYR1 are calcium channels present at the sarcoplasmic reticulum membrane. In response to excitation, they release calcium ions from the sarcoplasmic reticulum to the cytosol. Calcium promotes actin-myosin-mediated contraction of muscles.
The binding of dantrolene to the RYR1...
The binding of dantrolene to the RYR1...
01:12Alterations in Muscle Tone ll
Alterations in muscle tone are common manifestations of neurological disorders and reflect dysfunction within different nervous system regions. Spasticity, paratonia, and dystonia represent distinct forms of hypertonia, each with unique mechanisms, clinical features, and diagnostic importance.CharacteristicsSpasticity happens from upper motor neuron lesions and is characterized by velocity-dependent resistance to passive movement. Clinical features include:Exaggerated deep tendon reflexesClonus...