BACKGROUND Tuberculosis contact investigation identifies individuals who may be recently infected with tuberculosis and are thus at increased risk for disease. Contacts with latent tuberculosis infection (LTBI) are offered chemoprophylaxis to prevent active disease; however, the effectiveness of this intervention is unclear as treatment completion is generally low. METHODS A retrospective coh...

The Centers for Disease Control and Prevention hosted a workshop to formulate recommendations for the control of invasive group A streptococcal (GAS) disease among household contacts of persons with invasive GAS infections and for responding to postpartum and postsurgical invasive GAS infections. Experts reviewed data on the risk of subsequent invasive GAS infection among household contacts of ...

Three types of two-terminal CdS nanowire devices with distinct current versus voltage characteristics were fabricated by forming Schottky and/or Ohmic contacts in a controlled manner. Argon ion bombardment of CdS nanowires increased the carrier concentration allowing the formation of Ohmic Ti–CdS contacts. Scanning photocurrent microscopy SPCM was used to explore the influence of the contacts o...

We investigate the question when do the jobs found through social networks provide higher wages on average than the ones obtained on the market. In our model of heterogenous workers and heterogenous jobs the wages associated to a search method depend on the frequency that the given method provides information about jobs where the worker’s productivity is high. The performance of the formal mark...

BACKGROUND In 2009, national guidelines for hepatitis A control in Australia changed to recommend hepatitis A vaccine (HAV), instead of normal human immune globulin (NHIG), for post-exposure prophylaxis (PEP). AIMS (1) Determine whether the uptake of PEP among contacts of hepatitis A cases changed after the introduction of the new guidelines, and (2) assess the field effectiveness of the HAV ...

Semiconductor nanowires show promise for application in nanoscale electronics, but the difficulty of forming low-resistance ohmic contacts provides a challenge to their implementation. To improve the electrical performance of lithographically defined nickel contacts, nickel-silicide/ silicon axial nanowire heterostructures were formed by controlled partial silicidation. Prior to annealing, two-...

Epidemiologic and serologic data on 137 household contacts of 51 chronic carriers of HBsAg and 111 household contacts of 38 controls who were negative for serologic markers of hepatitis B virus (HBV) were obtained from March 1990 to August 1991. Using this data, possible routes of intrafamilial transmission of hepatitis B virus among household contacts of chronic carriers of hepatitis B surface...

The number of registered NGOs in Nepal has skyrocketed in the last ten years, growing in number from 220 in 1990 to somewhere between 10,000 and 15,000 today. At the same time, the Internet and the use of e-mail has increased rapidly. The Electronic Networking Project, funded by the International Development Research Centre and implemented by the International Center for Integrated Mountain Dev...

infection (5). Because Native Americans have increased rates of iGAS disease, compared with those of the general population, and because households in this investigation were crowded and many contacts had predisposing underlying conditions, we recommended that household contacts receive prophylaxis if given within 30 days of the index case-patient’s illness (5). No additional cases were reporte...