In the first generation of cases, those 3 individuals transmitted the disease agent to 21 people (9 health care workers, 9 family members and 3 friends).
Eradication is concerned with elimination of the disease agent after it has become established in the area of the growing host or has penetrated the host.
Scientists often use the term "R0" as a statistical way to monitor an epidemic, with "R" standing for the reproductive number of an infectious disease agent.
A conjunctival infection of newborns (inclusion conjunctivitis) is caused by a similar disease agent found in the birth canal of the mother.
But, said Dr. James M. Robl, president and chief scientific officer at Hematech, "A cow carrying complete human antibody genes could simply be immunized against the target disease agent and human antibodies could be collected in a couple of months".
An inability to trace the new cases would mean that the disease agent had become loose in the general population, raising the specter that it would become an endemic disease.
Beginning in 1957 with the discovery that the trachoma microorganism could be grown in the laboratory, fundamental studies on the disease agent, as well as development of experimental vaccines, became possible.
Does loss of biodiversity generally increase or decrease disease agent transmission?
Alternatively put, screening can only prevent an outbreak of contagion where an effective test for a known disease agent has been developed and incorporated into routine surveillance procedures.
In general and due to the acute nature of the disease, agent detection by PCR and virus isolation are the primary tools for diagnostic investigations.
Here we investigated whether the HBV core protein can be exploited as a vaccine carrier for whole-chain protein antigens, using two clinically relevant proteins derived from a bacterial human pathogen, the Lyme disease agent Borrelia burgdorferi.
