Diferenças de género e sexo na susceptibilidade às doenças infecciosas / Gender and sex difference susceptibility to infectious diseases

As doenças infecciosas ocorrem de forma desproporcional entre homens e mulheres. Muitas vezes, a severidade e o resultado da doença estão geralmente relacionados ao sexo. Os factores inerentes a estas diferenças ainda estão a ser estudados. Contudo, alguns estudos apontam o sexo como um dos factores principais das difer- enças da resposta imunológica às infecções. As mulheres desenvolvem naturalmente uma imunidade inata, celular e humoral com algumas utuações devido aos níveis hormonais que naturalmente variam durante os ciclos menstruais, gravidez, menopausa ou pelo uso de anticonceptivos hormonais ou o uso de tratamentos hormonais. Entretanto, as hormonas masculinas também têm sido implicadas na imunoregulação. A testesterona por exemplo causa o declínio de certas respostas imunológicas e os indivíduos jovens do sexo masculino são muitas vezes susceptíveis a infecções severas comparados às mulheres ou a homens adultos. Por outro lado, o género joga um papel importante na susceptibilidade às infecções transmitidas por vectores. Outros estudos apontam que o padrão hormonal no seio da família e a química da pele in uenciam na susceptibilidade à picada por mosquitos e outros vectores nos homens e mulheres. As diferenças comportamentais, ocupacionais e culturais também estão relacionadas com a exposição a vectores, assim como o uso de medidas de protecção individual e a procura pelos cuidados de saúde. Tomando em conta estes aspectos, é importante que futuros estudos imunológicos, epidemiológi- cos, comportamentais, de conhecimentos atitudes e práticas tenham em conta o sexo como uma variável, para uma melhor interpretação dos resultados e melhores práticas de saúde, princi- palmente no que tange ao tratamento das doenças infecciosas.

Infectious diseases occur di erently in men and women. Usually the severity and the result of the disease are related to the gender. Although some studies indicate the gender as one of main factor of immunological di erences, the causes of these di erences are still to be revealed. However, Women naturally develop innate immune response, cellular and humoral response with some uctuations due to the level of hormones that varies during the menstrual cycle, pregnancy and menopause, or due to the use of anti-conception pill or the use of hormonal treatments. e hormones from males also are implicated in immunoregulation. Testosterone decreases certain immune responses and young males are more susceptible to severe infections compared to adult males and females. In other hand, the gender was shown to play an important role on the susceptibility to vector transmitted diseases where the hormonal pattern within the family and the chemistry of the skin in uence the susceptibility to mosquito's bite and other vectors in men and women. e behavior, occupational and cultural behaviors in uence the exposure to vectors, but also the use of individual protection measures and the search for health services. Taking together, it's very important that future studies address gender and sex di erences in their designs, in order to conduct better conclusions and heath practices related to infectious diseases treatment or prevention.

Mozambique field epidemiology and laboratory training program: a pathway for strengthening human resources in applied epidemiology.

INTRODUCTION: In the last decades, Mozambique has been undergoing demographic, epidemiological, economic and social transitions, which have all had a notable impact on the National Health System. New challenges have emerged, causing a need to expand the preparation and response to emerging disease threats and public health emergencies. METHODS: We describe the structure and function of the Mozambique Field Epidemiology Training Program (MZ-FELTP) and the main outputs achieved during the first 6 years of program implementation (consisting of 3 cohorts). We also outline the contribution of the program to the National Health System and assess the retention of the graduates. RESULTS: The MZ-FELTP is a post-graduate in-service training program, based on the acquisition of skills, within two tracks: applied epidemiology and laboratory management. The program was established in 2010, with the objective of strengthening capacity in applied epidemiology and laboratory management, so that events of public health importance can be detected and investigated in a timely and effective manner. The program is in its seventh year, having successfully trained 36 health professionals in the advanced course. During the first six years of the program, more than 40 outbreaks were investigated, 37 surveillance system evaluations were conducted and 39 descriptive data analyses were performed. Surveillance activities were implemented for mass events and emergency situations. In addition, more than 100 oral and poster presentations were given by trainees at national and international conferences. CONCLUSION: The MZ-FELTP has helped provide the Ministry of Health with the human and technical resources and operational capacity, to rapidly and effectively respond to major public health challenges in the country. The continuous involvement of key stakeholders is necessary for the continuation, expansion and ongoing sustainability of the program.

An epidemic of spastic paraparesis of unknown aetiology in Northern Mozambique.

This case study is based on a real-life outbreak investigation undertaken in Mozambique in 1981. This case study describes and promotes one particular approach to unknown disease outbreak investigation. Investigational procedures, however, may vary depending on location and outbreak. It is anticipated that the epidemiologist investigating an unknown disease outbreak will work within the framework of a "multidisciplinary investigation team". It is through the collaborative efforts of this team, with each member playing a critical role, that outbreak investigations are successfully completed. Some aspects of the original outbreak and investigation have, however, been altered to assist in meeting the desired teaching objectives and to allow completion of the case study in less than 3 hours.

Analysis of trauma admission data at an urban hospital in Maputo, Mozambique.

BACKGROUND: Trauma is a major public health concern. Worldwide, injuries resulted in 4.8 million deaths in 2013, an increase of 11 % since 1990. The majority of deaths from trauma in low-and middle-income countries occur in a pre-hospital setting. Morbidity from trauma contributes significantly to disability in these countries. Mozambique has experienced a rise in injury-related morbidity and mortality. Efforts are underway to prioritize surgical and anesthesiology care in the post-2015 Global Surgery agenda that will build on momentum of the Millennium Development Goals. Injury surveillance remains vital to defining priorities and implementing policy changes. METHODS: We performed a cross-sectional study between June and September, 2010 at the Hospital Central de Maputo (HCM). Data were collected on all patients admitted to the HCM emergency surgical services with a diagnosis of trauma. We describe patient characteristics and mechanism of traumatic injury by calculating simple proportions (for dichotomous or categorical variables) or medians with interquartile ranges (IQR) for continuous variables. Multivariable logistic regression analysis was used to estimate the mechanisms of trauma most associated with alcohol consumption. RESULTS: A total of 517 patients were approached for inclusion in this study. Of these, 441 (91.5 %) participants were followed from admission until discharge. Three hundred twenty-four participants (73.5 %) were male. The most common age group was 20-29 years old. The three principal mechanisms of injury were road traffic injury, fighting, and falls, accounting for 74 % of injuries recorded. Traumatic injury involving alcohol consumption was nine times more likely to occur at a recreation/sporting event (OR 9.0, 95 % CI 3.01-27.13, p ≤ 0.0001). CONCLUSIONS: As Mozambique prepares to respond to the post-2015 international development agenda, urgent action is required to scale-up its national injury surveillance networks. Injury prevention efforts in Mozambique should focus attention on improving road safety regulations and their implementation, as well as on interventions targeting violence reduction and the reduction of alcohol consumption at sporting events.

Training laypersons and hospital personnel in basic resuscitation techniques: an approach to impact the global trauma burden in Mozambique.

INTRODUCTION: Over half of prehospital deaths in low-income countries are the result of airway compromise, respiratory failure, or uncontrolled hemorrhage; all three conditions can be addressed using simple first-aid measures. For both hospital personnel and laypersons, a basic trauma resuscitation training in modified ABCD (airway, breathing, circulation, disability) techniques can be easily learned and applied to increase the number of first responders in Mozambique, a resource-challenged country. METHODS: A trauma training session was administered to 100 people in Mozambique: half were hospital personnel from 7 district medical centers and the other half were selected laypersons. This session included a pre-test, intervention, and post-test to evaluate and demonstrate first response skills. RESULTS: Eighty-eight people completed both the pre- and post-tests. Following the education intervention, both groups demonstrated an improvement in test scores. Hospital personnel had a mean post-test score of 60% (SD = 17, N = 43) and community laypeople had a mean score of 51% (SD = 16, N = 45). A t test for equal variances demonstrated significant difference between the post-intervention scores for the two groups (p = 0.01). All 100 participants were able to open an airway, externally control hemorrhage, and transport a patient with appropriate precautions. CONCLUSION: The trauma training session served as new information that improved knowledge as well as skills for both groups, and increased the number of capable responders in Mozambique. This study supports WHO recommendations to utilize the strengths of a developing nation-population-as the first step in establishing an organized trauma triage system.

Cholera epidemiology in Mozambique using national surveillance data.

BACKGROUND: Mozambique has experienced cholera for several decades. This study was undertaken to evaluate epidemiologic patterns to assist in guiding public health interventions. METHODS: We evaluated district-level Ministry of Health data for 123 consecutive weeks starting 1 January 2009. Cholera cases reported to the national level were based on clinical suspicion rather than microbiological confirmation. Time and space analyses with mapping and spatial statistics were undertaken. RESULTS: During 2009-2011, Mozambique identified 220 deaths among the 25 431 reported suspected cholera cases (case fatality ratio [CFR], 0.87%). There were 108 outbreaks that occurred in 73 (50%) of Mozambique's 145 districts. Five distinct spatial clusters were identified involving inland and coastal as well as rural and urban populations. Among 78 outbreaks whose duration was known, average duration was 7.2 weeks (median, 6; range, 1-25). During weeks 1-3, 4-6, 7-9, and ≥ 10 after an outbreak, CFRs were 1.6%, 0.66%, 0.33%, and 0.25%, respectively. During 2010, districts that experienced an outbreak during 2009 had a CFR of 0.2% compared with 4.3% among other districts. DISCUSSION: Mozambique continues to experience widespread cholera outbreaks of short duration involving distinct spatial clusters. These findings will influence choice of public health strategies.