Prevention of persistent L. monocytogenes contamination in food processing plants presents a critical challenge to food safety professionals.

In June 2001, the Los Angeles County Department of Health Services/Public Health conducted a cohort study of an outbreak of acute febrile gastroenteritis among 16 of 44 healthy attendees of a catered party. The median age of the attendees who became ill was 15.5 years. Symptoms included body aches (in 88% of attendees), fever (81%), headache (81%), diarrhea (63%), and vomiting (56%). Illness was associated with ingestion of precooked, sliced turkey (P=.000004). Six stool specimens yielded Listeria monocytogenes. Leftover turkey yielded L. monocytogenes, 1.6x10(9) cfu/g. All isolates were serotype 1/2a and had matching molecular fingerprints. Clusters of suspect cases were identified among attendees at 2 other catered events, but no additional cases were confirmed. This is only the third reported outbreak of L. monocytogenes-associated gastroenteritis in the United States. In cases of febrile gastroenteritis for which routine cultures for enteric pathogens are negative, clinicians should suspect listeriosis and should consider asking laboratories to retain stool specimens to expedite testing for Listeria organisms.

Latinos are more likely to test late for HIV infection compared to other racial/ethnic groups in the United States. A population-based interview study was used to examine factors associated with late HIV testing for Latinos diagnosed with AIDS in Los Angeles County (LAC) to develop more effective HIV testing outreach strategies. Latinos testing for HIV within one year of an AIDS diagnosis were considered as late testers, while those diagnosed with AIDS more than one year after an HIV diagnosis were defined as non-late testers. After adjusting for age, education, country of birth, and injection drug use in a logistic regression analysis, completion of the interview in Spanish was the main factor associated with late testing (adjusted Odds Ratio (AOR) = 2.9, 95% Confidence Intervals (CIs): 1.4, 6.0). Latinos testing late for HIV were also more likely to test due to illness (p<0.0001) and less likely to test as part of a clinical screening (p<0.0001). Late testers were more likely to receive their first positive HIV test as a hospital inpatient (p<0.0001) and less likely to test positive at a community health center or public clinic (p=0.05). To accomplish widespread and timely HIV testing for Latinos in LAC, Spanish-language social marketing campaigns are needed and Spanish-speaking patients should be offered HIV testing in all clinical settings.

HIV-infected patients frequently experience depression, drug use, and unstable housing but are often unable to access supportive services to manage these challenges. Data on barriers to needed supportive services are critical to improving patient access. Data from the Medical Monitoring Project (MMP), a national supplemental surveillance system for HIV-infected persons in care, was used to examine barriers to support service use and factors associated with need and unmet need for services. Interview data for 333 patients in care in 2007 and 2008 in Los Angeles County (LAC) showed that 71% (n=236) reported needing at least one supportive service and of these, 35% (n=83) reported at least one unmet need for services (46% Latino; 25% white; 83% male; 92% 30+; 77% gay/bisexual; 40% response rate). The main reasons that supportive services were not accessed included lack of information (47%; do not know where to go or who to call); an agency barrier (33%; system too confusing, wait list too long); or a financial/practical barrier (18%; too expensive, transportation problems). In a logistic regression that included all participants (n=333), African Americans (OR=3.1, 95% CI: 1.1-8.7) and those with incomes less than $10,000 were more likely to have service needs (odds ratio [OR]=3.5; 95% confidence interval [CI]: 1.3-9.3). Among those with at least one service need (n=236), those who were gay or bisexual were more likely to report at least one unmet service need (OR=2.8; 95% CI: 1.3-6.1). Disparities were found for need and unmet need for supportive services by race/ethnicity; income and sexual orientation. The reported reasons that services were not obtained suggest needed improvements in information dissemination on availability and location of HIV support services and more streamlined delivery of services.

Demographic and behavioral factors associated with methamphetamine use are presented for 455 men who have sex with men (MSM) and 228 non-MSM diagnosed with AIDS in Los Angeles County (LAC) from 2000 to 2004, as there are limited population-based data for these subgroups. Lifetime methamphetamine use was 35% for MSM, 14% for non-MSM, 50% for white MSM, and 35% for black MSM. Methamphetamine use in the previous 12 months among MSM (11%) and non-MSM (0.4%) was less than lifetime use. Compared to MSM with no history of methamphetamine use in a multivariate analysis, MSM methamphetamine users were more likely to be non-Latino (white or black) (OR = 2.8, 95% CI: 1.6, 4.9) compared to Latino and reported > or = 10 sexual partners in the previous 12 months (OR = 3.1, 95% CI: 1.7, 5.6). These data indicate that methamphetamine has been widely used by both MSM and non-MSM with AIDS in LAC and that lifetime use is associated with sexual risk behaviors among MSM.