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Beth P Bell

Publications and source records attributed to Beth P Bell.

At least 37 records · Page 2Linked to original sources
PubMed2005

Incidence of hepatitis A in the United States in the era of vaccination.

CONTEXT: In the United States, hepatitis A is a frequently reported vaccine-preventable disease. Vaccination has been recommended for persons at increased risk since 1996. In 1999, it was recommended that children living in 11 states with the highest incidence of hepatitis A be routinely vaccinated, and that children living in 6 additional states, with incidence above the national average, be considered for routine vaccination. OBJECTIVE: To assess impact of the current vaccination strategy by evaluating trends in reported cases of hepatitis A since implementation. DESIGN, SETTING, AND CASES: A longitudinal analysis of characteristics of cases of hepatitis A reported in the United States since 1990 to the National Notifiable Diseases Surveillance System. MAIN OUTCOME MEASURE: Incidence rates of reported cases of hepatitis A. Incidence rates in 2003 were compared with those for the prevaccination baseline period (1990-1997) overall and in the 17 states in which children should be routinely vaccinated or considered for routine vaccination (vaccinating states). Incidence rates in vaccinating states were also compared with those in the remaining states where there is no recommendation for statewide vaccination of children (nonvaccinating states). RESULTS: Between the baseline period (1990-1997) and 2003, overall hepatitis A rates declined 76% to 2.6 per 100,000, significantly lower than previous nadirs in 1983 (9.2/100,000) and 1992 (9.1/ 100,000). The rate in vaccinating states declined 88% to 2.5 per 100,000 compared with 53% elsewhere (to 2.7/100 000). In 2003, cases from vaccinating states accounted for 33% of the national total vs 65% during the baseline period. Declines were greater among children aged 2 to 18 years (87%) than among persons older than age 18 years (69%); the proportion of cases in children dropped from 35% to 19%. Since 2001, rates in adults have been higher than among children, with the highest rates now among men aged 25 through 39 years. CONCLUSIONS: Following implementation of routine hepatitis A vaccination of children, hepatitis A rates have declined to historic lows, accompanied by substantial changes in the epidemiologic profile. Greater decreases in the age groups and regions where routine vaccination of children is recommended likely reflect the results of implementation of this novel vaccination strategy. Continued monitoring is needed to verify that implementation continues to proceed and that low rates are sustained.

Adolescent↗
PubMed2005

Hepatitis a molecular epidemiology in the United States, 1996-1997: sources of infection and implications of vaccination policy.

BACKGROUND: The genetic relatedness of hepatitis A virus (HAV) isolates was determined to identify possible infection sources for case patients in the Sentinel Counties Study of Acute Viral Hepatitis. METHODS: A 315-nucleotide segment of the VP1-P2 region of the HAV genome was amplified and sequenced from serum of case patients and analyzed together with risk-factor data. RESULTS: Of 508 HAV-RNA-positive case patients, 449 (88.4%) were interviewed, and 255 (50.1%) reported >/=1 risk factor. Some 123 unique nucleotide sequence patterns (UNSPs) were identified--77 (62.6%) from only 1 case patient and the rest in 2-99 persons. Among international travelers, a single person was more often infected with a single type of UNSP (17/54 [31.5%]), compared with other case patients (48/393 [12.2%]; P<.001). UNSPs from travelers to Mexico (33/37 [89.2%]) clustered with those from Hispanic children (47/49 [95.9%]). Of 119 men who had sex with men, 96 (80.7%) had the same or similar UNSPs, which were also found in 37 men and 10 women with no identified infection source. CONCLUSION: HAV is often transmitted within networks of persons with similar risk factors, which may be the infection source for others in the community.

Acute Disease↗
PubMed2005

Vaccination in the county jail as a strategy to reach high risk adults during a community-based hepatitis A outbreak among methamphetamine drug users.

Illicit drug use (IDU) is an important risk factor for hepatitis A, but implementing vaccination programs among drug users is difficult. During January 2001-July 2002, 403 hepatitis A cases were reported in Polk County, Florida; 48% were drug users and of these, 80% were recently in jail. To assess the county jail as a potential vaccination venue, we interviewed 280 inmates and conducted a serologic survey during July--August 2002. Of these, 227 (81%) reported a past IDU history. Previous HAV infection was found in 33%. In communities with illicit drug users at risk for hepatitis A and who are frequently jailed, vaccination programs in jails could be an important component of a community-based strategy to control hepatitis A outbreaks among illicit drug users.

Adolescent↗
PubMed2005

Racial and ethnic distribution of nonalcoholic fatty liver in persons with newly diagnosed chronic liver disease.

We performed a cross-sectional study of newly diagnosed cases of nonalcoholic fatty liver disease (NAFLD) identified between December 1998 and December 2000 in the Chronic Liver Disease Surveillance Study. We compared the demographic and clinical features of NAFLD in a racially diverse representative U.S. population (Alameda County, CA). Diagnostic criteria for probable NAFLD were persistent unexplained elevation of serum aminotransferase levels, radiology (ultrasound or computed tomography scan) consistent with fatty liver, and/or two or more of the following: (i) body mass index of 28 kg/m(2) or more, (ii) type 2 diabetes, or (iii) hyperlipidemia, in the absence of significant alcohol use. Definite NAFLD cases required histological confirmation. Of the 742 persons with newly diagnosed chronic liver disease, 159 (21.4%) had definite or probable NAFLD. The majority were nonwhite: Hispanics (28%), Asians (18%), African Americans (3%), and other race(s) (6%). African Americans with NAFLD were significantly older than other racial or ethnic groups (P < .001), and in Asians, NAFLD was 3.5 times more common in males than in females (P = .016). Clinical correlates of NAFLD (obesity, hyperlipidemia, diabetes) were similar among racial and ethnic groups, except that body mass index was lower in Asians compared with other groups (P < .001). Compared with the base population (Kaiser Permanente members), Hispanics with NAFLD were overrepresented (28% vs. 10%) and whites were underrepresented (45% vs. 59%). In conclusion, these racial and gender variations may reflect differences in genetic susceptibility to visceral adiposity, including hepatic involvement, and may have implications for the evaluation of persons with the metabolic syndrome. Clinicians need to be aware of the variable presentations of NAFLD in different racial and ethnic groups.

Adult↗
PubMed2005

A large outbreak of hepatitis B virus infections associated with frequent injections at a physician's office.

OBJECTIVES: To determine whether hepatitis B virus (HBV) transmission occurred among patients visiting a physician's office and to evaluate potential transmission mechanisms. DESIGN: Serologic survey, retrospective cohort study, and observation of infection control practices. SETTING: Private medical office. PATIENTS: Those visiting the office between March 1 and December 26, 2001. RESULTS: We identified 38 patients with acute HBV infection occurring between February 2000 and February 2002. The cohort study, limited to the 10 months before outbreak detection, included 91 patients with serologic test results and available charts representing 18 case-patients and 73 susceptible patients. Overall, 67 patients (74%) received at least one injection during the observation period. Case-patients received a median of 14 injections (range, 2-25) versus 2 injections (range, 0-17) for susceptible patients (P < .001). Acute infections occurred among 18 (27%) of 67 who received at least one injection versus none of 24 who received no injections (RR, 13.6; CI95, 2.4-undefined). Risk of infection increased 5.2-fold (CI95, 0.6-47.3) for those with 3 to 6 injections and 20.0-fold (CI95, 2.8-143.5) for those with more than 6 injections. Typically, injections consisted of doses of atropine, dexamethasone, vitamin B12, or a combination of these mixed in one syringe. HBV DNA genetic sequences of 24 patients with acute infection and 4 patients with chronic infection were identical in the 1,500-bp region examined. Medical staff were seronegative for HBV infection markers. The same surface was used for storing multidose vials, preparing injections, and dismantling used injection equipment. CONCLUSION: Administration of unnecessary injections combined with failure to separate clean from contaminated areas and follow safe injection practices likely resulted in patient-to-patient HBV transmission in a private physician's office.

Aged↗
PubMed2005

Epidemiology of hepatitis B and hepatitis B virus infection in United States children.

Before the era of routine hepatitis B vaccination, an estimated 24,000 children acquired hepatitis B virus (HBV) infection each year in the United States. Childhood hepatitis B immunization has led to significant declines in the incidence and prevalence of HBV infection in U.S. children. Because the greatest burden of hepatitis B is caused by complications of hepatocellular carcinoma and cirrhosis in adults who were infected with HBV as children, most of the benefits of vaccination have yet to be realized. Reaching the goal of eliminating HBV transmission to children likely will require increasing vaccination coverage, ensuring timely administration of postexposure immunoprophylaxis to prevent more perinatal infections, and continued evaluation of the impact of immunization recommendations.

Adolescent↗
PubMed2005

Ongoing transmission of hepatitis B virus infection among inmates at a state correctional facility.

OBJECTIVES: We sought to determine hepatitis B virus (HBV) infection prevalence, associated exposures, and incidence among male inmates at a state correctional facility. METHODS: A cross-sectional serological survey was conducted in June 2000, and susceptible inmates were retested in June 2001. RESULTS: At baseline, 230 inmates (20.5%; 95% confidence interval [CI]=18.2%, 22.9%) exhibited evidence of HBV infection, including 11 acute and 11 chronic infections. Inmates with HBV infection were more likely than susceptible inmates to have injected drugs (38.8% vs 18.0%; adjusted prevalence odds ratio [OR]=3.0; 95% CI=1.9, 4.9), to have had more than 25 female sex partners (27.7% vs 17.5%; adjusted prevalence OR=2.0; 95% CI=1.4, 3.0), and to have been incarcerated for more than 14 years (38.4% vs 17.6%; adjusted prevalence OR=1.7; 95% CI=1.1, 2.6). One year later, 18 (3.6%) showed evidence of new HBV infection. Among 19 individuals with infections, molecular analysis identified 2 clusters involving 10 inmates, each with a unique HBV sequence. CONCLUSIONS: We documented ongoing HBV transmission at a state correctional facility. Similar transmission may occur at other US correctional facilities and could be prevented by vaccination of inmates.

Acute Disease↗
PubMed2004

Quantifying the impact of hepatitis A immunization in the United States, 1995-2001.

Hepatitis A rates have declined to historically low rates in the United States. To assess the degree to which this decline was attributable to immunization, we correlated changes in the incidence of hepatitis A with increases in immunization coverage in a Poisson regression model. In a model allowing for herd immunity, an estimated 97,800 hepatitis A cases were averted due to immunization between 1995-2001, including 39% of potential cases in 2001. Assuming no herd immunity; 32,300 cases of hepatitis A would have been prevented. Sensitivity analysis showed that the number of averted cases in this period could range from 45,500 to 172,900. Among children 2-18 years old, vaccination coverage averaged 10% in 2001 and is estimated to have prevented 51% of cases in this age group. These results suggest that much of the recent reduction of hepatitis A rates is attributable to immunization and that immunization has been associated with a strong herd immunity effect.

Adult↗
PubMed2004

Chronic liver disease mortality in the United States, 1990-1998.

In 1998, chronic liver disease (CLD) was the tenth leading cause of death in the U.S. Alcohol and hepatitis C are thought to be important etiologies. However, traditional methods for calculating CLD mortality rates from death certificates may underestimate hepatitis C-related CLD mortality. We studied patterns of CLD deaths reported from 1990 through 1998, using an expanded definition that included death certificates where CLD, viral hepatitis, or CLD-related sequelae were reported as the underlying cause. We calculated overall age-specific and age-adjusted mortality rates, and according to demographic characteristics and recorded causes, and evaluated trends using linear regression modeling. CLD mortality declined 5% overall from 1990 through 1994 (12.1 to 11.6/100,000; P = 0.002), but remained unchanged from 1995 through 1998 (P = 0.366). Decreases were similar for all causes except hepatitis C, for which rates increased 220% from 1993 to 1998 (0.57 to 1.67/100,000). Rates declined in all racial-ethnic groups except American Indians and Alaska Natives (AI/AN), among whom rates were unchanged. Of 30,933 CLD deaths in 1998, 39% were coded as alcohol related, 15% as hepatitis C, 4% as hepatitis B, and 44% had no recorded cause. Age-adjusted rates were higher among males (47.6/100,000) than females (32.2/100,000) and among Hispanics (19.1/100,000) compared with non-Hispanics (10.8/100,000). Rates among AI/AN (28.7/100,000) were more than twice those of African Americans and whites (12.9/100,000 and 11.5/100,000, respectively). In conclusion, 1998 CLD deaths and the proportion attributable to viral hepatitis increased by 23% and 19%, respectively, compared with traditional methods. Mortality declines of the early 1990s were not sustained after 1994. Large disparities in CLD mortality remain, particularly among American Indians and Alaska Natives.

Adult↗
PubMed2004

Factors associated with fulminant liver failure during an outbreak among injection drug users with acute hepatitis B.

Death related to acute hepatitis B occurs in approximately 1% of patients. We investigated an outbreak of hepatitis B virus (HBV) infections among injection drug users (IDUs) resulting in several deaths. We conducted a case-control study of fulminant (case patients) and nonfulminant (control patients) HBV infections. We directly sequenced the entire HBV genome from fulminant and nonfulminant cases. From October 1998 to July 2000, 21 acute HBV infections, including 10 fulminant hepatitis B cases, were identified. The median age was 30 (range, 18-49) years, 12 (57%) were female, 20 (95%) were American Indians, and 20 (95%) reported injecting illicit drugs. All patients with fulminant hepatitis B died (case-fatality rate = 47.6%). Case patients (n = 5) and control patients (n = 9) were similar with respect to age, sex, race, and hepatitis C virus serostatus. All case patients used acetaminophen during their illness compared with 44% of control patients (P =.08). Compared with control patients, case patients lost more weight in the 6 months before illness (P =.04); during their illness, they used more alcohol (P =.03) and methamphetamine (P =.04). All 9 isolates sequenced were genotype D, shared 99.7% homology, and included mutations previously described in association with fulminant hepatitis B. In conclusion, a high prevalence of exposure to factors potentiating hepatic damage with acute hepatitis B contributed to the outbreak's high mortality rate; mutations present in the outbreak strain might also have been a factor. Improved vaccination coverage among IDUs has the potential to prevent similar outbreaks in the future.

Acute Disease↗
PubMed2004

A large nosocomial outbreak of hepatitis C and hepatitis B among patients receiving pain remediation treatments.

BACKGROUND AND OBJECTIVE: In August 2002, the Oklahoma State Department of Health received a report of six patients with unexplained hepatitis C virus (HCV) infection treated in the same pain remediation clinic. We investigated the outbreak's extent and etiology. DESIGN, SETTING, AND PARTICIPANTS: We conducted a retrospective cohort study of clinic patients, including a serologic survey, interviews of infected patients, and reviews of medical records and staff infection control practices. Patients received outpatient pain remediation treatments one afternoon a week in a clinic within a hospital. Cases were defined as HCV or hepatitis B virus (HBV) infections among patients who reported no prior diagnosis or risk factors for disease or reported previous risk factors but had evidence of acute infection. RESULTS: Of 908 patients, 795 (87.6%) were tested, and 71 HCV-infected patients (8.9%) and 31 HBV-infected patients (3.9%) met the case definition. Multiple HCV genotypes were identified. Significantly higher HCV infection rates were found among individuals treated after an HCV-infected patient during the same visit (adjusted odds ratio [AOR], 6.2; 95% confidence interval [CI95], 2.4-15.8); a similar association was observed for HBV (AOR, 2.9; CI95, 1.3-6.5). Review of staff practices revealed the nurse anesthetist had been using the same syringe-needle to sequentially administer sedation medications to every treated patient each clinic day. CONCLUSIONS: Reuse of needles-syringes was the mechanism for patient-to-patient transmission of HCV and HBV in this large nosocomial outbreak. Further education and stricter oversight of infection control practices may prevent future outbreaks.

Adolescent↗
PubMed2004

Hepatitis A in Hispanic children who live along the United States-Mexico border: the role of international travel and food-borne exposures.

OBJECTIVES: Hispanic children who live along the United States-Mexico border historically have had among the highest hepatitis A rates in the United States, but risk factors have not been well characterized. The objective of this study was to examine risk factors associated with acute hepatitis A virus (HAV) infection in Hispanic children who live along the United States-Mexico border in San Diego County, California. METHODS: In this case-control study, hepatitis A cases among Hispanic children who were younger than 18 years reported from June 1998 through August 2000 were matched by age group and exposure period to Hispanic children who were susceptible to HAV infection. Participants and their families were interviewed about demographic information and potential sources of HAV infection, including attending child care, food and waterborne exposures, cross-border and other international travel, and travel-related activities. RESULTS: Participants included 132 children with hepatitis A and 354 control subjects. The median age of study participants was 7 years (range: 1-17). Sixty-seven percent of case-patients traveled outside the United States during the incubation period, compared with 25% of the children without hepatitis A (odds ratio [OR]: 6.3; 95% confidence interval [CI]: 4.0-9.7); all children, except 1, had traveled to Mexico. In multivariate analysis, hepatitis A was associated with having eaten food from a taco stand or street food vendor (adjusted OR: 17.0; 95% CI: 4.1-71.1) and having eaten salad/lettuce (adjusted OR: 5.2; 95% CI: 1.3-20.1) during travel. CONCLUSIONS: Hepatitis A among Hispanic children who live in an urban area of the United States-Mexico border is associated with cross-border travel to Mexico and food-borne exposures during travel. Travelers to areas where hepatitis A is endemic should receive hepatitis A vaccine before travel.

Adolescent↗
PubMed2004

Hepatitis A incidence and hepatitis a vaccination among American Indians and Alaska Natives, 1990-2001.

OBJECTIVES: We assessed the effect on trends in hepatitis A incidence of the 1996 recommendation for routine hepatitis A vaccination of American Indian/Alaska Native (AIAN) children. METHODS: We examined trends in hepatitis A incidence among AIAN peoples during 1990-2001 and vaccination coverage levels among children on the largest American Indian reservation. RESULTS: Hepatitis A rates among AIANs declined 20-fold during 1997-2001. Declines in hepatitis A incidence occurred among AIANs in reservation and metropolitan areas. Among 1956 children living on the Navajo Nation whose medical records were reviewed, 1508 (77.1%) had received at least one dose of hepatitis A vaccine, and 1020 (52.1%) had completed the vaccine series. CONCLUSIONS: Hepatitis A rates among AIAN peoples have declined dramatically coincident with implementation of routine hepatitis A vaccination of AIAN children.

Adolescent↗
PubMed2004

Prevalence of infection with waterborne pathogens: a seroepidemiologic study in children 6-36 months old in San Juan Sacatepequez, Guatemala.

Water and sanitation interventions in developing countries have historically been difficult to evaluate. We conducted a seroepidemiologic study with the following goals: 1) to determine the feasibility of using antibody markers as indicators of waterborne pathogen infection in the evaluation of water and sanitation intervention projects; 2) to characterize the epidemiology of waterborne diarrheal infections in rural Guatemala, and 3) to measure the age-specific prevalence of antibodies to waterborne pathogens. Between September and December 1999, all children 6-36 months of age in 10 study villages were invited to participate. We collected sufficient serum from 522 of 590 eligible children, and divided them into six-month age groups for analysis (6-12, 13-18, 19-24, 25-30, and 31-36 months). The prevalence of antibodies was lowest in children 6-12 months old compared with the four older age groups for the following pathogens: enterotoxigenic Escherichia coli (48%, 81%, 80%, 77%, and 83%), Norwalk virus (27%, 61%, 83%, 94%, and 94%), and Cryptosporidium parvum (27%, 53%, 70%, 67%, and 73%). The prevalence of total antibody to hepatitis A virus increased steadily in the three oldest age groups (40%, 28%, 46%, 60%, and 76%). In contrast, the prevalence of antibody to Helicobacter pylori was relatively constant in all five age groups (20%, 19%, 21%, 25%, and 25%). Serology appears to be an efficient and feasible approach for determining the prevalence of infection with selected waterborne pathogens in very young children. Such an approach may provide a suitable, sensitive, and economical alternative to the cumbersome stool collection methods that have previously been used for evaluation of water and sanitation projects.

Animals↗
PubMed2003

Outbreak of hepatitis A among men who have sex with men: implications for hepatitis A vaccination strategies.

Between November 1998 and May 1999, 136 cases of hepatitis A were reported in Columbus, Ohio. Eighty-nine (65%) case patients were reinterviewed. Of 74 male case patients, 47 (66%) were men who have sex with men (MSM). These 47 MSM were compared with 88 MSM control subjects, to identify risk factors for infection and potential opportunities for vaccination. During the exposure period, 6 (13%) case patients reported contact with a person who had hepatitis A, compared with 2 (2%) control subjects (odds ratio, 6.15; 95% confidence interval, 1.04-48.02); neither number of sex partners nor any sex practice was associated with illness. Most case patients and control subjects (68% and 77%, respectively) saw a health care provider at least annually, and 93% of control subjects reported a willingness to receive hepatitis A vaccine. MSM are accessible and amenable to vaccination; increased efforts are needed to provide vaccination, regardless of reported sex practices.

Adolescent↗
PubMed2003

Prevalence of hepatitis A virus infection among sewage workers in Georgia.

BACKGROUND: Wastewater (WW) workers could have opportunity for direct contact with raw sewage, which might contain hepatitis A virus (HAV). METHODS: A serologic survey of WW workers and a comparison population of roads and drainage workers (RD). Factors potentially associated with anti-HAV positivity were evaluated in univariate and multivariate analyses. RESULTS: Among the 365 WW workers, overall anti-HAV prevalence was 38%, similar to that (35%) of the 166 RD workers (P = 0.5). Prevalence varied by wastewater job type from 45% among the 164 field crew workers to 32% among the 201 treatment plant workers. In multivariate modeling, factors associated with anti-HAV positivity included age > or = 40 years (odds ratio [OR] = 2.4; 95% CI = 1.6-3.7), black compared to other races (OR = 2.4; 95% CI = 1.5-3.8), birth outside the United States (OR = 7.5; 95% CI = 3.0-18.6), a high school education or less (OR 2.1; 95% CI = 1.4-3.2) and work on the field crew compared to RD work (OR 1.6; 95% CI = 1.1-2.4). CONCLUSIONS: These results are consistent with no or a small increased risk of hepatitis A among WW workers, and do not provide a clear mandate for hepatitis A vaccination of these workers. Am. J. Ind. Med. 43: 172-178, 2003.

Adult↗
PubMed2003

Costs of a hepatitis A outbreak affecting homosexual men: Franklin County, Ohio, 1999.

BACKGROUND: Hepatitis A is one of the most commonly reported, vaccine-preventable diseases in the United States. Many cases occur in association with community-wide outbreaks, but societal costs to the community are seldom documented. METHODS: Hepatitis A case-patients available for a follow-up interview as part of an outbreak investigation were asked about hospitalization, healthcare costs, missed work, and lost wages associated with their illness, as well as healthcare insurance coverage and sick-leave reimbursement. Average costs were calculated by case-patient age, gender, and hospitalization status for lost wages, and by age and hospitalization status for medical costs, and then assigned to case-patients not re-interviewed to provide an estimate of overall costs. Health departments provided outbreak-associated costs. RESULTS: Between the weeks of November 2, 1998, and May 17, 1999, a total of 136 cases of hepatitis A were reported. Of the 89 (65.4%) case-patients available for interview, 74 (83%) were male; of those, 47 (64%) identified themselves as men who have sex with men (MSM). The average cost of the outbreak per case-patient was $2894 US dollars, of which 51% was associated with lost wages, 40% with medical costs, and 9% with health department costs. Case-patients incurred 44% of total outbreak costs; employers, 29%; healthcare insurers, 18%; and health departments, 9%. CONCLUSIONS: In this community-wide hepatitis A outbreak, case-patients incurred the largest portion of costs, followed by employers, healthcare insurers, and health departments.

Adolescent↗