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Objective: To characterize intimate partner abuse and identify the main factors associated with violence in pregnancy in four highly deprived States in Mexico., Material and Methods: The data were taken from the National Survey on Violence against Women 2003 (ENVIM per its abbreviation in Spanish). Based on it a cross-sectional study was conducted on 1 949 women between 15 and 50 years of age, who were once pregnant and who utilized primary and secondary health care services from the Ministry of Health, Mexican Institute of Social Security, and the Institute for Social Security and Services for State Workers in Guerrero, Hidalgo, Oaxaca and Chiapas states, between November 2002 and March 2003. Logistic regression was used to assess the association between independent variables and violence during pregnancy., Results: 250 women (13%) suffered a type of violence (physical, psychological, sexual or economical) during any of their pregnancies. Of these women 76 (30.40%) were battered on their abdomen. In most of these cases (91.39%) the husband was the aggressor. The variables significantly associated with violence in pregnancy were: woman's illiteracy (OR 2.2; CI 95:% .1,4.4); history of violence in childhood (OR 3.2; CI 95% 1.9, 5.4) as well as sexual abuse in her childhood (OR 2.4, CI 95% 1.3, 4.4) and her partner's daily alcohol consumption (OR 6.5; CI 95% 3.3, 12.9)., Conclusions: The results show that violence during pregnancy is a regular event in the impoverished context and that its expression is more severe. These results point to the importance of continued study of the problem of violence against pregnant women in Mexico and the importance of identifying battered women in prenatal care.

Objective: To describe the methodology, the research designs used, the estimation and sample selection, variable definitions, collection instruments, and operative design and analytical procedures for the National Survey Violence Against Women in Mexico., Material and Methods: A complex (two-step) cross-sectional study was designed and the qualitative design was carried out using in-depth interviews and participant observation in health care units., Results: We obtained for the quantitative study a total of 26 240 interviews in women users of health services and 2 636 questionnaires for health workers; the survey is representative of the 32 Mexican states. For the qualitative study 26 in-depth interviews were conducted with female users and 60 interviews with health workers in the States of Quintana Roo, Coahuila and the Federal District.

Objective: To identify the prevalence of violence against females among those who are health service beneficiaries in Mexico., Material and Methods: The National Survey on Violence against Women (ENVIM, per its Spanish abbreviation) was applied in 2003 to female users of public primary and secondary health care services. The sampling framework was based on a stratified, probabilistic sample in two stages. First the health care units were selected with probability proportional to the number of physicians' offices in the unit, from a list of possible care units. Second, women 15 years and older who sought care at the health care unit were selected for participation in the study through systematic sampling. Univariate analysis and then bivariate analysis were carried out on the data collected with a questionnaire., Results: The sample included 26 042 women between 15 and 92 years of age, with a mean age of 35.8 years. Physical violence during childhood was reported by 42% of the women. Only 7.8% answered yes to a general question about whether they experienced domestic partner violence, but 21.5% reported experiencing violence of any type during the last 12 months as measured by a scale including specific acts of psychological, economic, physical and sexual violence. The most frequently reported type of violence was psychological (19.6%). Of the women who had been pregnant, 14.1% reported having experienced violence during pregnancy, and 4.4% reported being hit in the abdomen. The prevalence of sexual violence was 17.3% and close to half reported being victims of this type of violence before age 15. Higher prevalence of violence was found among women with lower levels of formal education, living in a rented home, in areas with higher overcrowding indices, and users of Ministry of Health care services., Conclusions: Identifying and measuring violence is complex, given the diverse types of violence and how they are perceived and therefore reported by women themselves. This is an important public health problem, in view of the high frequency observed in this study and the immediate implications. These findings indicate the urgent need for interventions to prevent and treat violence.

Mycoplasma pneumoniae is one of the most common bacteria causing respiratory diseases in other countries, specially in older children, adolescents and young adults and less frequently in the age group studied here, nevertheless the determination of its presence in this group was considered important. Two hundred and fifty throat swabs were taken from children, under five years of age, hospitalized with a diagnosis of acute respiratory infections (ARI) and to 50 children, same age, with no ARI (controls). The samples were placed in transport media and were incubated at 37 degrees C during 7 to 15 days. They were reinoculated in PPLO agar and typical colonies were looked for, 5 to 8 days later. The organisms were identified by biochemical tests. Eight Mycoplasma sp (3.2%) were obtained, five of them were M. pneumoniae (2.0%) and three M. hominis (1.2%). Only in 2 cases adenoviruses with M. hominis were found in the absence of other pathogens. It was shown that M. pneumoniae also infects children under five years old, so its present should be suspected, specially when the patient's health does not improve with the installed treatment. Some important suggestions for the isolation of mycoplasma are given.