Publications by authors named "Olivero J"

Article Synopsis
  • Climate change might make it easier for mosquitoes that spread dengue and yellow fever to thrive in more places.
  • Researchers studied how different areas could change for these mosquitoes because of climate changes happening now and in the future.
  • They found that certain regions in Africa and Asia might see more mosquitoes, and it’s important to pay attention to these areas to keep track of these mosquito populations.
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BackgroundWest Nile virus (WNV) is a flavivirus with an enzootic cycle between birds and mosquitoes; humans and horses are incidental dead-end hosts. In 2020, the largest outbreak of West Nile virus infection in the Iberian Peninsula occurred, with 141 clusters in horses and 77 human cases.AimWe analysed which drivers influence spillover from the cycle to humans and equines and identified areas at risk for WNV transmission.

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Monoamine oxidases (MAOA/MAOB) are enzymes known for their role in neurotransmitter regulation in the central nervous system (CNS). Irreversible and non-selective MAO inhibitors (MAOi's) were the first class of antidepressants, thus subsequent work on drugs such as the selective MAOA inhibitor clorgyline has focussed on selectivity and increased CNS penetration. MAOA is highly expressed in high grade and metastatic prostate cancer with a proposed effect on prostate cancer growth, recurrence, and drug resistance.

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West Nile virus (WNV) is a globally significant vector-borne disease that is primarily transmitted between birds and mosquitoes. Recently, there has been an increase in WNV in southern Europe, with new cases reported in more northern regions. Bird migration plays a crucial role in the introduction of WNV in distant areas.

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International travellers are exposed to pathogens not commonly found in their countries of residence, including West Nile virus (WNV). Due to the difficulty of its diagnosis, little is known about its distribution in Africa. Understanding the geographic extent of risk of WNV infections is a necessity for both travellers and clinicians who advise and treat them, since there is no human vaccine.

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Yellow fever is transmitted by mosquitoes among human and non-human primates. In the last decades, infections are occurring in areas that had been free from yellow fever for decades, probably as a consequence of the rapid spread of mosquito vectors, and of the virus evolutionary dynamic in which non-human primates are involved. This research is a pathogeographic assessment of where enzootic cycles, based on primate assemblages, could be amplifying the risk of yellow fever infections, in the context of spatial changes shown by the disease since the late 20 century.

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The evolutionary history of African hunter-gatherers holds key insights into modern human diversity. Here, we combine ethnographic and genetic data on Central African hunter-gatherers (CAHG) to show that their current distribution and density are explained by ecology rather than by a displacement to marginal habitats due to recent farming expansions, as commonly assumed. We also estimate the range of hunter-gatherer presence across Central Africa over the past 120,000 years using paleoclimatic reconstructions, which were statistically validated by our newly compiled dataset of dated archaeological sites.

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Article Synopsis
  • West Nile virus (WNV) is primarily spread among birds by mosquitoes but can spill over to mammals through infected bites.
  • Researchers created a database tracking WNV presence across Africa, including various animal groups like reservoirs and vectors, while investigating factors influencing its spread.
  • The study found that important wetland areas are linked to WNV detection, and human activities contribute significantly to outbreaks, helping identify risk zones for managing and predicting the virus's spread beyond Africa.
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Dengue is a viral disease transmitted by mosquitoes. The rapid spread of dengue could lead to a global pandemic, and so the geographical extent of this spread needs to be assessed and predicted. There are also reasons to suggest that transmission of dengue from non-human primates in tropical forest cycles is being underestimated.

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West Nile virus is a widely spread arthropod-born virus, which has mosquitoes as vectors and birds as reservoirs. Humans, as dead-end hosts of the virus, may suffer West Nile Fever (WNF), which sometimes leads to death. In Europe, the first large-scale epidemic of WNF occurred in 1996 in Romania.

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Caring for Patients with Spinal Cord Injuries.

Methodist Debakey Cardiovasc J

November 2020

The column in this issue is supplied by Juan Jose Olivero, MD, who was a nephrologist at Houston Methodist Hospital and a member of the hospital's Nephrology Training Program before his retirement in 2019. Dr. Olivero obtained his medical degree from the University of San Carlos School of Medicine in Guatemala, Central America, and completed his residency and nephrology fellowship at Baylor College of Medicine in Houston, Texas.

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The column in this issue is supplied by Juan Jose Olivero, MD, who recently retired as a nephrologist at Houston Methodist Hospital and member of the hospital's Nephrology Training Program. Dr. Olivero obtained his medical degree from the University of San Carlos School of Medicine in Guatemala, Central America, and completed his residency and nephrology fellowship at Baylor College of Medicine in Houston, Texas.

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Herbal Nephropathy.

Methodist Debakey Cardiovasc J

January 2020

This column is supplied by Amita Jain, MD, and Juan Jose Olivero, MD. Dr. Jain completed an internal medicine residency at Houston Methodist Hospital in Houston, Texas, and recently joined a primary care practice in Delaware.

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Obesity is a chronic, relapsing, multifactorial disease, which has become a serious threat to public health globally, as the worldwide prevalence of obesity increases exponentially over time. It has been well established that obesity is associated with multiple adverse cardiometabolic effects. Although lifestyle changes are the first line of therapy for obesity, these are often insufficient in attaining weight loss goals.

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Background: Over the last decade, reports about dengue cases have increase worldwide, which is particularly worrisome in South America due to the historic record of dengue outbreaks from the seventeenth century until the first half of the twentieth century. Dengue is a viral disease that involves insect vectors, namely Aedes aegypti and Ae. albopictus, which implies that, to prevent and combat outbreaks, it is necessary to understand the set of ecological and biogeographical factors affecting both the vector species and the virus.

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Background: Currently, there is an increasing global interest for the study of how infectious diseases could be linked to climate and weather variability. The Chagas disease was described in 1909 by Carlos Chagas, and is caused by the flagellate protozoan Trypanosoma cruzi. The Chagas disease is considered one of the biggest concerns in public health in Latin America.

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Lipids and Renal Disease.

Methodist Debakey Cardiovasc J

June 2019

The column in this issue is supplied by Anita Shah, M.D., and Juan Jose Olivero, M.

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The Kidney as an Endocrine Organ.

Methodist Debakey Cardiovasc J

April 2019

The column in this issue is supplied by Vinay Acharya, D.O., and Juan Jose Olivero, M.

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The column in this issue is supplied by Whitney Sharp, D.O., and Juan Jose Olivero, M.

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Biogeography is an implicit and fundamental component of almost every dimension of modern biology, from natural selection and speciation to invasive species and biodiversity management. However, biogeography has rarely been integrated into human or veterinary medicine nor routinely leveraged for global health management. Here we review the theory and application of biogeography to the research and management of human infectious diseases, an integration we refer to as 'pathogeography'.

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The column in this issue is supplied by Juan Jose Olivero, M.D., a nephrologist at Houston Methodist Hospital and a member of the hospital's Nephrology Training Program.

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The column in this issue is supplied by Anita H. Shah, M.D.

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Ebola virus disease (EVD) is a contagious, severe and often lethal form of hemorrhagic fever in humans. The association of EVD outbreaks with forest clearance has been suggested previously but many aspects remained uncharacterized. We used remote sensing techniques to investigate the association between deforestation in time and space, with EVD outbreaks in Central and West Africa.

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Background: Numerous small and medium-sized mammal pests cause widespread and economically significant damage to crops all over the globe. However, most research on pest species has focused on accounts of the level of damage. There are fewer studies concentrating on the description of crop damage caused by pests at large geographical scales, or on analysis of the ecological and anthropogenic factors correlated with these observed patterns.

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Remote sensing and traditional ecological knowledge (TEK) can be combined to advance conservation of remote tropical regions, e.g. Amazonia, where intensive in situ surveys are often not possible.

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