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OBJECTIVE: To examine associations between migration and sexually transmitted infection (STI) prevalence among Mexican female sex workers (FSW). METHODS: FSW aged 18 years and older in Tijuana, Baja California (BC) underwent interviews and testing for HIV, syphilis, gonorrhoea and chlamydia. Multivariate logistic regressions identified correlates of STI. RESULTS: Of 471 FSW, 79% were migrants to BC. Among migrant FSW, prevalence of HIV, syphilis, gonorrhoea, chlamydia and any STI was 6.6%, 13.2%, 7.8%, 16.3% and 31.1% compared with 10.9%, 18.2%, 13.0%, 19.0% and 42.4% among FSW born in BC. A greater proportion of migrant FSW were registered with local health services and were ever tested for HIV. Migrant status was protective for any STI in unadjusted models (unadjusted odds ratio 0.61, 95% CI 0.39 to 0.97). In multivariate models controlling for confounders, migrant status was not associated with an elevated odds of STI acquisition and trended towards a protective association. CONCLUSIONS: Unexpectedly, migrant status (vs native-born status) appeared protective for any STI acquisition. It is unclear which social or economic conditions may protect against STI and whether these erode over time in migrants. Additional research is needed to inform our understanding of whether or how geography, variations in health capital, or social network composition and information-sharing attributes can contribute to health protective behaviours in migrant FSW. By capitalising on such mechanisms, efforts to preserve protective health behaviours in migrant FSW will help control STI in the population and may lead to the identification of strategies that are generalisable to other FSW.

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Since migration has been linked to new drug trends and risky behaviors, and deported individuals face unique economic and social stressors, we investigated behaviors of injection drug users (IDUs) from Tijuana, Mexico in relation to deportation history. In 2005, IDUs > or =18 years old who injected within the prior month were recruited by respondent-driven sampling, administered a questionnaire, and underwent antibody testing for HIV, HCV, and syphilis. Logistic regression compared IDUs who reported coming to Tijuana due to deportation from the U.S. versus others in the study. Of 219 participants, 16% were deportees. Prevalence of HIV, HCV and syphilis was 3, 95 and 13%, respectively. Deportees had lived in Tijuana for a shorter time (median: 2 vs. 16 years), were more likely to inject multiple times/day (OR: 5.52; 95%CI: 1.62-18.8), but less likely to have smoked/inhaled methamphetamine (OR: 0.17; 95%CI: 0.17-0.86). Deportation history was inversely associated with receiving drug treatment (OR: 0.41; 95%CI: 0.19-0.89), recent medical care (OR: 0.37; 95%CI: 0.13-1.00), or HIV testing (OR: 0.44; 95%CI: 0.19-1.02). Deportees had different drug use patterns and less interaction with public health services than other study participants. Our study is an indication that migration history might relate to current risk behaviors and access to health care. More in-depth studies to determine factors driving such behaviors are needed.

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OBJECTIVE: To describe 2 cases of lipoid pneumonia in Mexican American infants after administration of vegetable- or animal-derived oils and the cultural barriers to diagnosis. Various folk remedies have been documented in the international medical literature that involve the oral or nasal administration of vegetable- or animal-derived oils to children for the treatment of common ailments, including nasal stuffiness, constipation, and colic. Lipoid pneumonia is a known complication of such practices in Mexico, India, Saudi Arabia, and other countries. METHODS: Case reports of 2 Mexican American infants with respiratory distress and interviews with 30 immigrant families of Mexican origin. RESULTS: In both cases, language and cultural barriers resulted in a delayed diagnosis of lipoid pneumonia. Interviews with immigrant families confirmed that oil administration to children is a common traditional therapy in Mexican cultures. CONCLUSIONS: These findings underscore the need for primary care providers to be aware of the traditional practice of oil administration to infants in many cultures, its pathophysiological consequences, the potential cultural barriers to timely diagnosis, and the opportunity to prevent cases of lipoid pneumonia through anticipatory guidance.

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"Will a North American Free Trade Agreement (NAFTA) decrease Mexican migration to the United States, as the U.S. and Mexican governments assert, or increase migration beyond the movement that would otherwise occur, as NAFTA critics allege? This article argues that it is easy to overestimate the additional emigration from rural Mexico owing to NAFTA-related economic restructuring in Mexico. The available evidence suggests four major reasons why Mexican emigration may not increase massively, despite extensive restructuring and displacement from traditional agriculture....NAFTA-related economic displacement in Mexico may yield an initial wave of migration to test the U.S. labor market, but this migration should soon diminish if the jobs that these migrants seek shift to Mexico."

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The limited empirical data available on maternal health problems among Mexican immigrant women in the United States suggest that they underutilize health services, especially general preventive care. Research conducted among legal and undocumented women in the Mexican immigrant population in San Diego, California, support these findings. Among undocumented mothers, 11.5% of their births in the U.S. occurred with no prenatal care or care sought in the third trimester, which is much higher than Mexican women legally in the country (3.6%) and the general San Diego maternal population (3.8%). When we examine births which occurred within the last five years by immigration status, we find that women legally in the country have a much higher rate of cesarean delivery of both undocumented women and women in the general San Diego maternal population. Undocumented women in our sample were much less likely than their legal counterparts to return for postpartum examinations for themselves, to seek neonatal care for their infants, and to have had Pap examinations or carry out breast self-examinations.

PIP: Between March 1981 and February 1982, personal in-home interviews were conducted with 2,103 adults born in Mexico who were living or working in San Diego County, California, regardless of their legal status in the US. Both documented, (legal) and undocumented respondents exhibited a number of socioeconomic characteristics which could influence their utilization of US medical services. The data indicate that underutilization of prenatal care exists in this population. Among undocumented mothers, 11.5% of their births in the US occurred with no prental care sought in the 3rd trimester, which is much higher than Mexican women legally in the country (3.6%) and the general San Diego maternal population (3.8%). When births which occurred within the last 5 years are examined by immigration status, it is found that women legally in this country have a much higher rate of cesarean delivery for both undocumented women and women in the general San Diego maternal population. Undocumented women in our sample were much less likely than their legal counterparts to return for postpartnum examinations for themselves, to seek neonatal care for their infants, and to have had Pap examinations or carry out breast self-examinations.

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This paper examines survey data gathered from 2103 Mexican immigrants living or working in San Diego County, California, in order to explore four fundamental questions concerning the utilization of health services: (a) What type of health services do Mexican immigrants use? (b) When hospitals are used, do they tend to be emergency room services? (c) Do Mexican immigrants use preventive services? (d) To what extent do the utilization patterns of undocumented immigrants differ from their legally-immigrated counterparts? The socioeconomic profile of the sample is characterized through analysis of variables such as sex, age, length of residence in the U.S., occupation and income. Mexican immigrants, particularly the undocumented, are relatively young compared to the non-immigrant population, of short duration in the U.S. and earn low income. In addition, undocumented and legally-immigrated respondents are covered by medical insurance at rates far below the general population. Mexican immigrants, including the undocumented, use a variety of health services. Hospital services are not the primary source of care. However, when undocumented respondents did use hospital services, they were more likely to use emergency room care than their legally-immigrated counterparts, who were more likely to use out-patient services. Finally, undocumented respondents tended to neglect preventive services as evidenced by examination of the use of pre-natal care, general check-ups and dental services.

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"This article discusses data collection methods and basic issues of research strategy in field studies of unapprehended illegal immigrants living in the United States. It suggests ways to increase the reliability and validity of interview responses. Necessary modifications in format and style of interviews are described. An annotated bibliography of recent field studies of undocumented immigrants is provided."

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