Diseases & Vaccines
History of Vaccines Blog
Last Polio in Americas
This neonate is displaying a bodily rigidity produced by Clostridium tetani exotoxin, called “neonatal tetanus”. Neonatal tetanus occurs in infants born without protective passive immunity, because the mother is not immune. It usually occurs through infection of the unhealed umbilical stump, particularly when the stump is cut with an unsterile instrument.
This micrograph depicts a group of Clostridium tetani bacteria, responsible for causing tetanus in humans. Tetanus is an acute, often fatal, disease caused by an exotoxin produced by C. tetani.
Scanning electron microscope image of Neisseria meningitidis, bacteria that cause meningococcal disease, x3750. About the image technique: Modern technologies such as electron microscopy can give finer detail to bacteria than optical (light) microscopy and can even be used to show internal features. Electron micrographs are generated by a high-energy beam of electrons, rather than by light and lenses, as with an optical microscope.
Multiple Puncture TB 2
First step in multiple puncture technique of TB vaccination. Three rows of ten punctures each would follow. This method is not currently used.
Measles Spreads from Disneyland
After a record year for measles cases in the post-elimination era, measles cases continued to spread in January 2015. Visitors to Disneyland in Anaheim, California, were exposed to measles via an as-yet-unidentified person. As of the end of January, the CDC had identified at least 100 cases associated with the Disneyland exposures and called for parents to ensure their children are fully immunized.