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Sister-chromatid exchange analysis in a rural population of Mexico exposed to pesticides.

Cytogenetic damage was evaluated by means of the analysis of sister-chromatid exchange (SCE) in a rural population of Tlaxcala, Mexico, in occupational contact with pesticides. We studied 170 men, 94 exposed and 76 not exposed. It was shown that SCE followed a normal distribution and Student's t test did not present differences between the two groups (P = 0.4). The frequency of SCE was not correlated with the duration of exposure of the rural workers (r = -0.06), the multiple covariance analysis applied to the data of duration of exposure, tobacco intake and alcohol ingestion demonstrated a lack of statistical significance. In the exposed people we observed no symptoms provoked by these compounds.

Adolescent↗

Primary lung cancer in Mexico city: a report of 1019 cases.

A retrospective study was performed in patients diagnosed with primary lung cancer, and admitted to the Instituto Nacional de Enfermedades Respiratorias between 1984 to 1992. One thousand and nineteen patients were studied, 636 males and 383 females. We found a higher incidence in the group among 61-70 years of age in both sexes. The highest percentage of tumors were from the adenocarcinoma variety, followed by the epidermoid carcinoma, while the small-cell carcinoma presented a lower incidence. Smoking has been associated with the development of lung cancer. Many of our patients were smokers. The highest frequency was in smokers with a smoking habit of more than 30 years and a rate of more than 10 cigarettes per day. However, an important part of the patients with cancer did not have a smoking habit, which led us to believe that there are other etiological possibility factors (genetic or environmental) that could be involved. Most of the cases of cancer were staged as stage IIIb and stage IV and the patients had an ECOG of 1-2. The main symptoms were coughing, sputum, dyspnea and thoracic pain. This data shows an increasing frequency of lung cancer in Mexico city as well as other countries, it also shows that it is going to be a serious health problem in the future. We consider that in order to improve the prognosis, it is necessary to increase the educational and orientation campaigns among the adult population with or without a smoking history.

Adult↗

Aging in selected anthropometric dimensions in a rural Zapotec-speaking community in the Valley of Oaxaca, Mexico.

Stature, weight, arm circumference, triceps skinfold and grip strength were measured in a cross-sectional sample of 116 men and 113 women, 20-82 years of age, from a rural Zapotec-speaking community in the Valley of Oaxaca in southern Mexico. Mortality statistics, growth, and maturity status of children in the village are indicative of chronic mild-to-moderate under-nutrition. Adult Zapotecs are smaller, lighter and leaner than reference data for better-off populations. Sex differences are clearly evident for stature, fatness and grip strength. Body weight shows little sex difference after 40 years of age. Estimated mid-arm muscle circumference, however, is larger in males at all ages except over 60 years. Weight, arm circumference, the triceps skinfold and estimated muscle circumference are generally lowest in women 20-39 years, most likely reflecting the depletion of energy stores due to successive pregnancies and lactation. When stature is adjusted for the estimated loss associated with aging, there is suggestion of a secular increase in males but not in females. Sampling variation, small numbers at the older ages, and perhaps selective out migration must be considered in evaluating possible secular effects. Although absolute grip strength of adult Zapotecs is less than that of better-off samples of adults, grip strength per unit body weight is similar.

Adult↗

Coverage and patterns of ambulatory medical care use in Tlalpan, Mexico City.

Health officials planned a stepped care system (regionalized) for Tlalpan, in the Federal District of Mexico (D.F.), to address problems of duplicated services, inappropriate use of available resources, increasing costs of medical care, and unmet health needs in the population. Cross-sectional surveys were carried out in the community, in health centers and in hospital based ambulatory services (outpatient department and emergency department) to obtain current, specific and valid information about need and utilization patterns. Users of the various services differed from each other and from the community by age, educational level, occupation, rights to prepaid care and utilization patterns. Emergency department users came back for care repeatedly and sought preventive services from the emergency department. Major reasons for attending the emergency department included respiratory and gastrointestinal problems, plus poisonings, accidents, and complications of pregnancy. Outpatient department users arrived without referral from medical sources and continued to return frequently for care. Users were mostly adults, particularly older adults, with problems of a more chronic nature, e.g. nervous system problems, genitourinary problems, etc. The health centers attended clients from the designated area of influence who had referred themselves to the center for care. Children were the most frequent clients with acute, common problems, e.g. diarrhea and respiratory problems. Health maintenance activities were assessed for which children received the most complete coverage, but some women lacked the necessary care for perinatal health and family planning. In general, health centers seemed to be functioning appropriately, although the magnitude of unattended need in their areas of influence must be investigated further.(ABSTRACT TRUNCATED AT 250 WORDS)

Adult↗

The geography of health in South-East Mexico: a research study and agenda.

Work on the geography of health has been undertaken in association with the Centro de Investigaciones Ecologicas del Sureste, Chiapas State, Mexico. An example is given from a study of relationships between housing and Chagas' disease in the village of Agua Azul in Chiapas. Prospects for future work in medical geography might involve further studies of Chagas' disease and onchocerciasis, and of the health of refugees and of populations involved in the exploitation of petroleum reserves.

Chagas Disease↗

A comparison of attitudes and practices of episiotomy among obstetrical practitioners in New Mexico.

The routine use of episiotomy is a subject of considerable controversy. To delineate attitudes and practices, we surveyed various groups of obstetrical practitioners in New Mexico. Routine use was favored most by obstetricians, less by family practitioners, less yet by nurse midwives and least by lay midwives. Many of the reasons given both for and against routine use were the same, underscoring the lack of scientific data and prospective studies of episiotomy and its effects.

Adult↗

Innovation in primary care: community health services in Mexico and the United States.

Providing adequate health care to a nation's citizens is a challenge in every country. Despite large differences in wealth, health care organization, and health politics, both Mexico and the United States undertook similar efforts to expand primary care to previously underserved populations during the past 30 years. This study analyzes common antecedents, contexts of change, elements of the innovations, problems with entrenched interests, and resources that have allowed both programs to survive in difficult environments. We show that new forms of primary health care can face similar problems and prospects in very different countries because of similar political, bureaucratic, and economic limitations.

Community Health Services↗

Costs and resource utilization for the treatment of incomplete abortion in Kenya and Mexico.

In much of the developing world, sharp curettage (SC) is the most commonly used technique for treating incomplete abortion. The procedure is usually performed in a hospital setting where physicians and operating theatres are available; it often involves light to heavy sedation for pain control and an overnight hospital stay for patient recuperation and monitoring. This study examined the hypothesis that use of manual vacuum aspiration (MVA)--a variation of vacuum aspiration (VA)--would be less costly than SC and thus be advantageous to healthcare systems with limited resources. The purpose of the study was to identify and, where possible, to explain the factors that contributed to cost differences between MVA and SC for treatment of incomplete abortion. To achieve this objective, researchers observed patient management and documented resource use at hospital sites in Kenya and Mexico. The results of the study support the researchers' hypothesis that, in most cases, treatment with MVA required a shorter patient stay and fewer hospital resources than SC, as the two techniques were practiced at the various study sites. The policy decision to adopt MVA, supported by procurement of instruments and incorporation of training in its use, is the basic prerequisite to achieving reduced levels of resource use. The study results also suggest that the full advantages of MVA can be realized only if it is introduced in conjunction with certain changes in patient management, such as offering outpatient treatment for incomplete abortion.

Abortion, Incomplete↗

Determinants of lactation performance across time in an urban population from Mexico.

We identified determinants of breastfeeding and full breastfeeding among 165 healthy mothers from Hermosillo, Mexico who planned to breastfeed and delivered vaginally a healthy term infant. Deliveries took place in either a nursery (n = 58) or a rooming-in (n = 107) public hospital where formula supplementation was not allowed. Multivariate analyses indicated that at 1 week full breastfeeding was associated (P < or = 0.05) with early milk arrival, social support for full breastfeeding and planned breastfeeding duration. At 2 months, full breastfeeding was associated with social support for full breastfeeding and early milk arrival. Breastfeeding was positively associated with early milk arrival and inversely associated with early introduction of supplementary bottles, maternal employment, maternal body mass index and infant age. At 4 months, full breastfeeding was positively associated with social support for full breastfeeding and inversely associated with infant age. Breastfeeding was positively associated with planned breastfeeding duration and inversely associated with early introduction of a bottle and urban background. Rooming-in mothers reported that their milk came in earlier (P < or = 0.05) than did the nursery group. Milk arrival was later when a bottle was introduced in the first week; both of these variables might be important in explaining a positive effect of rooming-in on lactation performance.

Adult↗

Practicing oncology in provincial Mexico: a narrative analysis.

This paper examines the discourse of oncologists treating cancer in a provincial capital of southern Mexico. Based on an analysis of both formal interviews and observations of everyday clinical practice, it examines a set of narrative themes they used to maintain a sense of professionalism and possibility as they endeavored to apply a highly technologically dependent biomedical model in a resource-poor context. They moved between coexisting narrative frameworks as they addressed their formidable problems of translating between theory and practice. In a biomedical narrative frame, they drew on biomedical theory to produce a model of cellular dysfunction and of clinical intervention. However, limited availability of diagnostic and treatment techniques and patients inability or unwillingness to comply, presented serious constraints to the application of this model. They used a practical narrative frame to discuss the socio-economic issues they understood to be underlying these limitations to their clinical practice. They did not experience the incongruity between theory and practice as a continual challenge to their biomedical model, nor to their professional competency. Instead, through a reconciling narrative frame, they mediated this conflict. In this frame, they drew on culturally specific concepts of moral rightness and order to produce accounts that minimized the problem, exculpated themselves and cast blame for failed diagnosis and treatment. By invoking these multiple, coexisting narrative themes, the oncologists sustained an open vision of their work in which deficiencies and impotency were vindicated, and did not stand in the way of clinical practice.

Communication↗

Making a killing south of the border: transnational cigarette companies in Mexico and Guatemala.

Cigarette smoking is the most unnecessary of modern epidemics in the world today, according to the World Health Organization. In response to declining sales at home, multinational cigarette companies are increasingly targeting allegedly developing countries with their deadly products, often with the strong support of the U.S. government. While Asian countries have been most heavily targeted in recent years, Latin American countries have not been overlooked. This paper discusses macro-level and micro-level implications of the tobacco companies' promotions, based on data gathered in Mexico and Guatemala during 1990. Recommendations for combating the corporations' efforts are also discussed.

Adolescent↗

Ethnography of fertility and menstruation in rural Mexico.

In rural populations in Mexico, the system of ideas in relation to the reproductive cycle is built on a mestizo base, with pre-Colombian and Western elements. The objective of the study was the analysis of concepts and resources related to human reproduction in Morelos, in order to design a primary reproductive health care program. The use of ethnographic methods helped identify bio-cultural constructs on which the communities base their reproductive patterns. Our main research results reveal that these populations attribute great value to the extension of the family through descendants. Women's sexuality is directly linked to reproduction and blood is the supremely feminine substance. Great importance is consistently attributed to menstruation about which well-defined concepts exist in the community, where as pre-menarche changes are perceived as a state of bio-psychosocial maturity. Menarche beyond 14 years of age is considered abnormal and is attributed to an 'excess of cold' in the body, therapy is usually administered by traditional birth attendants. In the mythical explanations given for bleeding, the moon plays a fundamental role, as the first rupture of the hymen is attributed to it. A general lack of knowledge about ovulation and its relation to reproduction was observed, resulting in incorrect contraceptive practices.

Adolescent↗

Traditional birth attendants in Mexico: advantages and inadequacies of care for normal deliveries.

In Mexico, traditional birth attendants (TBAs) are an essential resource for health care, especially in small rural communities where they attend approximately 45% of all deliveries. Both rural and urban women seek care with the TBAs because, amongst other things, they share the same cultural codes. In this study, qualitative and quantitative methods were used to analyze the concepts, resources and process of care during birth in rural areas of the state of Morelos. Results show that the socio-economic characteristics of the TBAs are similar to those of the patients, that they share the same precarious living conditions, and the resources to which they have access for providing care during births. When choosing a TBA as a health care provider, both the economic aspect and the importance of a shared symbolism come into play. We observed advantages in some of the traditional practices which should be incorporated into the medical system, for example protection through the massage of the perineum at the moment of expulsion. Nevertheless, there are inadequacies for which the implementation of training programs is fundamental, before articulate primary care programs using the TBAs can be promoted.

Female↗

Antibiotic use in a periurban community in Mexico: a household and drugstore survey.

In developing countries, antibiotics are the most common drugs sold, and some data suggest that they are frequently misused. In order to describe the pattern of antibiotic use in a periurban community in Mexico City, 1659 randomly-selected households were visited and an interview with the housewife was carried out. Six local drugstores also were selected at random. A social worker made six visits to each pharmacy, observed the events during the purchase of the drug and applied a structured questionnaire to the customer immediately after the transaction. Of 8279 individuals, 425 (5%) said that they had used at least one antimicrobial in the preceding 2 weeks and antibiotics were the majority (29%) of the drug sales. The main perceived reasons for drug use were acute respiratory tract ailments and gastroenteritis. Interviewees reported that antibiotic therapy was given in 27% of respiratory diseases and in 37% of all diarrheal episodes. The drugs most commonly reported were: penicillins, erythromycin, metronidazole, neomycin, cotrimoxazole and tetracyclines. While self-medication and drug purchases without medical prescription were common, the majority of antibiotics were prescribed by a physician. Approximately two thirds of individuals using an antibiotic said they had used it for less than 5 days and 72% of the purchases were for insufficient quantities of drugs. Our data suggest that antibiotics are frequently misused and they support the need to assess the determinants of self-medication, health-seeking behavior and physician prescribing practices. The need for effective educational programs to improve prescribers' decisions is stressed.

Adolescent↗

Improving physician prescribing patterns to treat rhinopharyngitis. Intervention strategies in two health systems of Mexico.

To improve prescribing practices for rhinopharyngitis, an interactive educational intervention and a managerial intervention were carried out in 18 primary care facilities in metropolitan Mexico City. Four family medicine clinics of the Mexican Social Security Institute (IMSS) and 14 health centres of the Ministry of Health (SSA) were included. A quasi-experimental design was employed. One hundred and nineteen physicians (IMSS 68, SSA 51) participated. Sixty-five physicians (IMSS 32, SSA 33) were in the study group, while 54 were in the control group (IMSS 36, SSA 18). The study had four stages: (I) baseline, to evaluate the physicians' prescribing behaviour for rhinopharyngitis; (II) intervention, using an interactive educational workshop and a managerial peer review committee; (III) post-intervention evaluation of short-term impact; and (IV) follow-up evaluation of long-term effect 18 months after the workshop. The control group did not receive any intervention but was evaluated at the same time as the study group. At baseline, most patients in both institutions received antibiotic prescriptions (IMSS 85.2%, SSA 68.8%). After the workshop, the percentage of patients receiving antibiotic prescriptions in the IMSS went from 85.2% to 48.1%, while in the SSA it went from 68.8% to 49.1%. Appropriateness of treatment was analyzed using the physician as the unit of analysis. At baseline, 30% of IMSS physicians in the study group treated their patients appropriately. After the intervention, this percentage increased to 57.7%, and at the 18-month follow-up it was 54.2%. The SSA study group increased the appropriate use of antibiotics from 35.7% to 46.2%, with this percentage falling to 40.9% after the 18-month follow-up period. In the control group there were no significant changes in prescribing patterns with respect to either the prescribing of antibiotics or the appropriateness of treatment. The intervention strategies were successful in both institutions. Forty per cent of physicians improved their prescribing practices after the workshop, with this change remaining in 27.5% of them throughout the follow-up period. On the other hand, 42.5% of the physicians did not change their prescribing practices after the intervention. The rest (17.5%) showed appropriate prescribing practices during all the stages of the study. We conclude that it is possible to improve the physicians' prescribing practices through interactive educational strategies and managerial interventions. This type of intervention can be an affordable way to provide continuing medical education to primary care physicians who do not have access to continuing educational activities, and to improve the quality of care they provide.

Adult↗

Epidemiologic observations on porcine cysticercosis in a rural community of Michoacan State, Mexico.

The prevalence of and risk factors for Taenia solium infection (cysticercosis) in pigs were studied in a rural community in Michoacan State, Mexico. Visual inspection of the tongues of 216 pigs revealed cysticerci in 14 (6.5%). The prevalence was slightly higher in male (10/105) than female pigs (4/110) (P = 0.06) and increased with age (P less than 0.05). The most important risk factors for infection in pigs were access to human feces at a public washing area (P = 0.004), the presence of an indoor latrine (P = 0.05) and indiscriminate disposal of human feces around the pig owner's household (P less than 0.1). Effective and long-lasting control of the transmission of T. solium from humans to pigs must include measures to deny pigs access to human feces, a change which is likely to be resisted because of the traditional and functional aspects of established pig-rearing practices.

Age Factors↗

Development and recovery of Haemonchus contortus first larval stages on experimental plots in Mexico.

The objective of this study was to determine the influence of relative humidity, environmental temperature and precipitation on the development of Haemonchus contortus from egg to infective larvae on experimental plots in a subtropical subhumid climate of Mexico. The study was of 1 year duration, with the highest rates of recovery of first-stage (L1) and second-stage larvae (L2) obtained at the end of the rainy season, and of third-stage larvae (L3) in the post-rainy season during the autumn. The lowest rate of recovery of L1 was in winter, whereas that of L2 and L3 mainly occurred in the dry season. The shortest development period for L1 was 12 h, for L2 18 h, and for L3 36 h. The longest development period for L1 was 66 h, for L2 156 h and L3 216 h. Statistical analysis of the data obtained showed significant differences in the time of development from eggs to infective larvae with respect to the season of the year.

Animals↗

A comparative analysis of two methods for the study of alcohol intake in Mexico.

Two different methodologies were studied in a semi-rural community in Mexico city to investigate alcohol-intake patterns and attitudes towards drinking and drunkenness. One of the methods consisted of a household survey. The other used the anthropological informant's technique. These methods were compared only at those points where were found similarities in the data collected. We conclude that both methods give comparable estimates of what goes on in the community. Nevertheless the informant method is cheaper, results are obtained in less time and the community members are engaged in this problem, thus permitting future action to be taken.

Alcohol Drinking↗