Listado de angiospermas epífitas que conforman jardines de hormigas de Azteca gnava (Formicidae) en el sureste de México

Background and Aims: The humid tropical forest canopy hosts a great diversity of epiphytic plants and arboreal ants. These biological groups are usually studied individually without considering their interactions. Still, they can establish complex and specialized mutualisms such as ant-gardens, a particular assembly of epiphytic angiosperms cultivated by ants. This work aimed to present the first annotated checklist and the distribution maps of the epiphytes and one ant species associated with ant-gardens in southeastern Mexico. Methods: We compiled occurrence records of the angiosperm epiphytes and ant species in specialized literature, herbarium records and photographs in national and international online databases, as well as field observations. Key results: We reported a total of eight species of epiphytes belonging to six angiosperm families and the ant Azteca gnava, distributed in southeastern Mexico (Veracruz to Quintana Roo) and with the highest diversity on the border between the states of Tabasco and Chiapas. Epidendrum flexuosum was the most representative species of the ant-gardens in southeastern Mexico. Conclusions: The ant-gardens are complex systems, and their study in Mexico is incipient, so we hope this work will encourage their research and the conservation of canopy species and their mutualisms.Antecedentes y Objetivos: El dosel de las selvas húmedas alberga una gran diversidad de plantas epífitas y hormigas arborícolas. Estos grupos biológicos suelen ser estudiados individualmente sin considerar sus interacciones, pero pueden establecer mutualismos complejos y especializados como los jardines de hormigas, los cuales son un ensamble particular de angiospermas epífitas cultivadas por hormigas. El objetivo de este trabajo fue presentar el primer listado comentado y los mapas de distribución de las epífitas y una especie de hormiga que se asocian en jardines de hormigas reportados en el sureste de México.Métodos: Se recopilaron registros de ocurrencia de las especies de angiospermas epífitas y hormigas en la literatura especializada, registros de herbario y fotografías disponibles en bases de datos en línea nacionales e internacionales, así como observaciones en campo. Resultados clave: Un total de ocho especies de epífitas pertenecientes a seis familias de angiospermas y la hormiga Azteca gnava, fueron documentados en el sureste de México (de Veracruz a Quintana Roo), siendo los límites entre los estados de Tabasco y Chiapas en donde se concentra la mayor diversidad. Epidendrum flexuosum fue la especie más representativa de los jardines de hormigas en el sureste de México.Conclusiones: Los jardines de hormigas son sistemas complejos y su estudio en México es incipiente, por lo que se espera que este trabajo incentive tanto el estudio como la conservación de las especies del dosel y sus mutualismos

New records of Orchidaceae Juss. for the state from Hidalgo, Mexico

Two new orchid records are reported for Hidalgo, Notylia barkeri Lindl. and Trichocentrum cosymbephorum (C. Morren) R. Jiménez & Carnevali. The genus Notylia is reported for the first time, and the list of orchid flora is updated to include 110 taxa. Unexpectedly, the species were recorded in abandoned orange plantations rather than natural vegetation, likely because of the high anthropogenic pressure exerted on their natural populations. These new records highlight the importance of continuing to survey regions such as Hidalgo with scarce orchid records, including both natural and modified vegetation

Global economic burden of unmet surgical need for appendicitis

Background There is a substantial gap in provision of adequate surgical care in many low- and middle-income countries. This study aimed to identify the economic burden of unmet surgical need for the common condition of appendicitis. Methods Data on the incidence of appendicitis from 170 countries and two different approaches were used to estimate numbers of patients who do not receive surgery: as a fixed proportion of the total unmet surgical need per country (approach 1); and based on country income status (approach 2). Indirect costs with current levels of access and local quality, and those if quality were at the standards of high-income countries, were estimated. A human capital approach was applied, focusing on the economic burden resulting from premature death and absenteeism. Results Excess mortality was 4185 per 100 000 cases of appendicitis using approach 1 and 3448 per 100 000 using approach 2. The economic burden of continuing current levels of access and local quality was US $92 492 million using approach 1 and$73 141 million using approach 2. The economic burden of not providing surgical care to the standards of high-income countries was $95 004 million using approach 1 and$75 666 million using approach 2. The largest share of these costs resulted from premature death (97.7 per cent) and lack of access (97.0 per cent) in contrast to lack of quality. Conclusion For a comparatively non-complex emergency condition such as appendicitis, increasing access to care should be prioritized. Although improving quality of care should not be neglected, increasing provision of care at current standards could reduce societal costs substantially

Global economic burden of unmet surgical need for appendicitis

Background There is a substantial gap in provision of adequate surgical care in many low- and middle-income countries. This study aimed to identify the economic burden of unmet surgical need for the common condition of appendicitis. Methods Data on the incidence of appendicitis from 170 countries and two different approaches were used to estimate numbers of patients who do not receive surgery: as a fixed proportion of the total unmet surgical need per country (approach 1); and based on country income status (approach 2). Indirect costs with current levels of access and local quality, and those if quality were at the standards of high-income countries, were estimated. A human capital approach was applied, focusing on the economic burden resulting from premature death and absenteeism. Results Excess mortality was 4185 per 100 000 cases of appendicitis using approach 1 and 3448 per 100 000 using approach 2. The economic burden of continuing current levels of access and local quality was US $92 492 million using approach 1 and$73 141 million using approach 2. The economic burden of not providing surgical care to the standards of high-income countries was $95 004 million using approach 1 and$75 666 million using approach 2. The largest share of these costs resulted from premature death (97.7 per cent) and lack of access (97.0 per cent) in contrast to lack of quality. Conclusion For a comparatively non-complex emergency condition such as appendicitis, increasing access to care should be prioritized. Although improving quality of care should not be neglected, increasing provision of care at current standards could reduce societal costs substantially