The risk of hepatitis B transmission from health care workers to patients in a hospital setting--a prospective study

Management of Hepatitis B Virus Infection: 2018 Guidelines from the Canadian Association for the Study of Liver Disease and Association of Medical Microbiology and Infectious Disease Canada

Hepatitis B virus (HBV) infection is an important public health problem in Canada. In keeping with evolving evidence and understanding of HBV pathogenesis, the Canadian Association for the Study of Liver Disease periodically publishes HBV management guidelines. The goals of the 2018 guidelines are to (1) highlight the public health impact of HBV infection in Canada and the need to improve diagnosis and linkage to care, (2) recommend current best-practice guidelines for treatment of HBV, (3) summarize the key HBV laboratory diagnostic tests, and (4) review evidence on HBV management in special patient populations and include more detail on management of HBV in pediatric populations. An overview of novel HBV tests and therapies for HBV in development is provided to highlight the recent advances in HBV clinical research. The aim and scope of these guidelines are to serve as an up-to-date, comprehensive resource for Canadian health care providers in the management of HBV infection.

Transmission of hepatitis B virus to multiple patients from a surgeon without evidence of inadequate infection control

BACKGROUND

Although about 1 percent of surgeons are infected with hepatitis B virus (HBV), transmission from surgeons to patients is thought to be uncommon. In July 1992, a 47-year-old woman became ill with acute hepatitis B after undergoing a thymectomy in which a thoracic-surgery resident who had had acute hepatitis B six months earlier assisted.

METHODS

To determine whether the surgeon transmitted HBV to this patient and others, we conducted chart reviews, interviews, and serologic testing of thoracic-surgery patients at the two hospitals where the surgeon worked from July 1991 to July 1992. Hepatitis B surface antigen (HBsAg) subtypes and DNA sequences from the surgeon and from infected patients were determined.

RESULTS

Of 144 susceptible patients in whose surgery the infected surgeon participated, 19 had evidence of recent HBV infection (13 percent). One of the hospitals was selected for additional study, and none of the 124 susceptible patients of the other thoracic surgeons at this hospital had evidence of recent HBV infection (relative risk, infinity; 95 percent confidence interval, 4.7 to infinity). No evidence was found for any common source of HBV other than the infected surgeon. The HBsAg subtype and the partial HBV DNA sequences from the surgeon were identical to those in the infected patients. Transmission of the infection was associated with cardiac transplantation (relative risk, 4.9; 95 percent confidence interval, 1.5 to 15.5) but not with other surgical procedures. The surgeon was positive for hepatitis B e antigen and had a high serum HBV DNA concentration (15 ng per milliliter). Our investigations identified no deficiencies in the surgeon's infection-control practices.

CONCLUSIONS

In this outbreak there was surgeon-to-patient HBV transmission despite apparent compliance with recommended infection-control practices. We could not identify any specific events that led to transmission.

HIV infection at home and in the workplace

Major questions have been raised concerning an individual's risk for contracting HIV infection when they come into contact with a patient who has AIDS in the home and/or workplace. Specific concerns are addressed and guidelines are reviewed.

The HIV-infected health care professional: employment policies and public health

In July 1990, the federal Centers for Disease Control (CDC) reported the first case of possible transmission of the Human Immunodeficiency Virus (HIV) to a patient from an HIV-infected health care worker. The transmission may have occurred during an invasive dental procedure performed on her by a dentist who had AIDS, and in January 1991, the CDC reported possible HIV transmission during dental procedures to two other patients of the same dentist. Further, the recent revelation that a respected surgeon at a major medical center performed many surgical procedures while infected with HIV created substantial public concern. These cases call into question the prudence of allowing infected workers to continue performing medical and dental procedures that involve some risk, however slight, of transmitting HIV infection to patients. Whether HIV-infected workers should be excluded from practice of their profession because of a remote risk to patients relates directly to levels of tolerable risk in health care delivery and in social policy.