First Report of Mango Malformation Disease Caused by Fusarium pseudocircinatum in Mexico.

Mango (Mangifera indica L.) malformation disease (MMD) is one of the most important diseases affecting this crop worldwide, causing severe economic loss due to reduction of yield. After the first report in India in 1891 (3), MMD has spread worldwide to most mango-growing regions. Several species of Fusarium cause the disease, including F. mangiferae in India, Israel, the USA (Florida), Egypt, South Africa, Oman, and elsewhere; F. sterilihyphosum in South Africa and Brazil; F. proliferatum in China; F. mexicanum in Mexico; and recently, F. tupiense in Brazil (1,2,3,4). Besides F. mexicanum, F. pseudocircinatum, not yet reported as a causal agent of MMD, was isolated in Mexico from affected inflorescences and vegetative malformed tissues (4). Symptoms of vegetative malformation caused by F. pseudocircinatum included hypertrophied, tightly bunched young shoots, with swollen apical and lateral buds producing misshapen terminals with shortened internodes and dwarfed leaves. Infected inflorescences of primary or secondary axes on affected panicles were shortened, thickened, and highly branched, while the peduncles became thick, remained green and fleshy, and branches profusely resembled a cauliflower in shape and size (3). Ten isolates of F. pseudocircinatum were recovered from cultivars Ataulfo, Criollo, Haden, and Tommy Atkins in Guerrero, Campeche, and Chiapas states and characterized. Isolates produced mostly 0-septate but occasionally 1- to 3-septate oval, obovoid, or elliptical aerial conidia (0-septate: 4 to 19 [avg. 8.7] × 1.5 to 4 [avg. 2.6] µm) in false heads in the dark and in short false chains under black light, unbranched or sympodially branched prostrate aerial conidiophores producing mono- and polyphialides, and sporodochia with straight or falcate conidia that were mostly 3- to 5-septate, but sometimes up to 7-septate (3-septate: 25 to 58 [avg. 41] × 2 to 3.3 [avg. 2.9] µm; 5-septate: 33.5 to 76.5 [avg. 56.7] × 2.5 to 6 [avg. 3.5] µm). Circinate sterile hyphae were rarely formed. Two representative isolates, NRRL 53570 and 53573, were subjected to multilocus molecular phylogenetic analyses of portions of five genes: nuclear large subunit 28S ribosomal RNA, ß-tubulin, calmodulin, histone H3, and translation elongation factor (TEF)-1α (GenBank GU737456, GU737457, GU737290, GU737291, GU737371, GU737372, GU737425, GU737426, GU737398, and GU737399). Two pathogenicity tests were conducted with NRRL 53570 and 53573 on healthy 2-year-old nucellar seedlings of polyembryonic Criollo; 20 µl conidial suspensions (5 × 106 conidia/ml) of each isolate and water controls were inoculated separately on 15 buds on 3 different trees, as described previously (1). The following conditions were used in experiment 1: 24 to 27°C with light intensity of 16.2 to 19.8 •Mol m-2s-1 in the range of 400 to 700 nm, and photoperiods of 14 h light and 10 h dark. Typical vegetative disease symptoms were discernible in plants inoculated with NRRL 53570 (20%) and 53573 (7%) after 8 months. In experiment 2, after 3 months growth under the above conditions, seedlings were transferred to an outdoor nursery in Iguala, Guerrero. Typical vegetative symptoms of MMD were observed in 86.7 and 13.3% of the buds inoculated with F. pseudocircinatum NRRL 53570 and 53573, respectively, after 9 months. Isolates from typical symptomatic vegetative buds were confirmed as F. pseudocircinatum by sequencing a portion of their TEF-1α gene, thus fulfilling Koch's postulates. This is the first report of F. pseudocircinatum as a causal agent of MMD. References: (1) S. Freeman et al. Phytopathology 89:456, 1999. (2) C. S. Lima et al. Mycologia 104:1408, 2012. (3) W. F. O. Marasas et al. Phytopathology 96:667, 2006. (4) G. Otero-Colina et al. Phytopathology 100:1176, 2010.

Sink versus tilt penetration into shaken dry granular matter: The role of the foundation.

We study the behavior of cylindrical objects as they sink into a dry granular bed fluidized due to lateral oscillations. Somewhat unexpectedly, we have found that, within a large range of lateral shaking powers, cylinders with flat bottoms sink vertically, while those with a "foundation" consisting of a shallow ring attached to their bottom, tilt besides sinking. The latter scenario seems to dominate independently from the nature of the foundation when strong enough lateral vibrations are applied. We are able to explain the observed behavior by quasi-2D numerical simulations, which also demonstrate the influence of the intruder's aspect ratio. The vertical sink dynamics is explained with the help of a Newtonian equation of motion for the intruder. Our findings may shed light on the behavior of buildings and other manmade structures during earthquakes.

[Inappropriate drug prescription and adverse drug effects in elderly patients]. / Prescripción inadecuada y efectos adversos a medicamentos en pacientes de edad avanzada.

AIMS: Inappropriate drug prescription (IP) has been related to higher hospitalization rates and development of adverse drug effects (ADE). We have studied the inappropriate drug prescriptions given to elderly patients admitted to the hospital and the frequency and severity of the adverse events related with them. PATIENTS AND METHODS: A prospective study was conducted in a sample of 100 patients over 65 years admitted in an Internal Medicine Department in whom at least one inappropriate drug prescription (Beers and STOPP (B-S) criteria [Screening Tool of Older Person's Prescriptions]) as outpatients or during the first 48 hours after the admission. The relationship of the adverse events with the inappropriate drug prescription was established using the Naranjo algorithm. RESULTS: A total of 97 patients, mean age 81 years (range 66-101) were included. The total amount of medicines prescribed during the hospital stay was 865, average of 9 (range 3-16). Thirty two percent was being treated with more than 10 drugs. A total of 153 (17.7%) were B-S drugs. There were 26 ADEs, 18 related with B-S drugs. Digoxin and lorazepam were the IP drugs most frequently prescribed and those related with a larger number of ADE. Fifty six percent of the ADEs were considered severe. Institutionalized elderly patients were treated with more drugs, but not more B-S medicaments. CONCLUSIONS: The frequency of ADEs related to IP is very high in the elderly. It is necessary to implement strategies to identify, and use properly these drugs in elderly population.

Infestation of Raoiella indica Hirst (Trombidiformes: Tenuipalpidae) on Host Plants of High Socio-Economic Importance for Tropical America.

The mite Raoiella indica Hirst was recently introduced into America, where it has shown amazing ability to disseminate and broaden its range of hosts. An experiment was conducted in Cancún, Mexico, to determine infestation levels of this mite on plants recorded as hosts: coconut palm (Cocos nucifera) of cultivars Pacific Tall and Malayan Dwarf, oil palm (Elaeis guineensis) hybrids Deli x Ghana and Deli x Nigeria, Dwarf Giant banana (Musa acuminata, AAA subgroup Cavendish), Horn plantain (M. acuminata x Musa balbisiana, AAB subgroup Plantain), lobster claw (Heliconia bihai), and red ginger (Alpinia purpurata). Nursery plants of these host species or cultivars were artificially infested with R. indica in February 2011. In the four replications of 10 plants, each plant was infested with 200 R. indica specimens, and the numbers of infesting mites were recorded for 6 months. A maximum of 18,000 specimens per plant were observed on coconut Pacific Tall and Malayan Dwarf, followed by lobster claw, with a maximum of 1000 specimens per plant. Infestations were minimal for the remaining plants. Mite numbers on all plants declined naturally during the rainy season. All plant materials sustained overlapping mite generations, indicating that they are true hosts. Complementarily, infestation level was determined in backyard bananas and plantains. Correlations of infestation with plant height, distance from coconuts, and exposure to direct sunlight were estimated. Both bananas and plantains were infested by R. indica even when situated far from infested coconut palms. A Spearman correlation was found between infestation and plant height, although it was significant only for Silk plantain.

Population Growth and Characterization of Plant Injuries of Steneotarsonemus spinki Smiley (Acari: Tarsonemidae) on Rice.

Rice is attacked by Steneotarsonemus spinki Smiley, a mite that has dispersed throughout many countries causing important loss on rice production. Rice plants of the variety Morelos A-92 were infested with S. spinki, and its population growth was estimated along plant development. Further, the morphological and histological injuries associated to the mite attack were characterized. The highest infestation level was obtained 13 weeks after plant infestation, with an average of 58.5 mites per plant, predominantly females. Morphological injuries were categorized from level 0 (no injuries from uninfested plants) to level 3, characterized by the highest injuries represented by blotches on the adaxial epidermis of the leaf sheath and on panicles and grains. Plants ranked within levels 0, 1, and 2 for morphological injury did not exhibit clear histological injuries, while those at level 3 exhibited histological injury characterized by destruction of cells of the adaxial epidermis, disorder, color change, and hypertrophy in the mesophyll cells, as well as color change in the abaxial epidermis. Thus, it presented a significant correlation between morphological injuries and mite density level, which can be further adopted to help the control decision-making process for this mite on rice.

Diversity and Genetic Variation among Brevipalpus Populations from Brazil and Mexico.

Brevipalpus phoenicis s.l. is an economically important vector of the Citrus leprosis virus-C (CiLV-C), one of the most severe diseases attacking citrus orchards worldwide. Effective control strategies for this mite should be designed based on basic information including its population structure, and particularly the factors that influence its dynamics. We sampled sweet orange orchards extensively in eight locations in Brazil and 12 in Mexico. Population genetic structure and genetic variation between both countries, among locations and among sampling sites within locations were evaluated by analysing nucleotide sequence data from fragments of the mitochondrial cytochrome oxidase subunit I (COI). In both countries, B. yothersi was the most common species and was found in almost all locations. Individuals from B. papayensis were found in two locations in Brazil. Brevipalpus yothersi populations collected in Brazil were more genetically diverse (14 haplotypes) than Mexican populations (four haplotypes). Although geographical origin had a low but significant effect (ca. 25%) on the population structure, the greatest effect was from the within location comparison (37.02 %). Potential factors driving our results were discussed.

Epilepsy, cerebral calcifications and clinical or subclinical coeliac disease. Course and follow up with gluten-free diet.

We have studied four patients (three male, one female, age range 15-25 years) with epilepsy, bilateral occipital calcifications and latent coeliac disease (CD). The epilepsy started at mean age 7 years, in three cases there were partial seizures and in one case generalized seizure. Three cases had symptoms suggesting malabsorptive syndrome during infancy and one case was diagnosed CD before the onset of seizures. In all cases serologic markers of CD were found, especially antiendomisium antibody, and intestinal biopsy indicated several grades of atrophy. The electroencephalograph (EEG) findings pointed to focal abnormalities in three patients and generalized abnormalities in one patient. In all cases computer tomography (CT) showed bilateral, almost symmetrical occipital calcifications in the cortical subcortical layers. The enhanced CT were unremarkable and magnetic resonance images (MRI) were normal. After diagnosis of CD, all patients followed a gluten-free diet and in three patients a significant reduction in seizure frequency was observed. CD should be ruled out in all cases of epilepsy, cerebral calcifications of unexplained origin and malabsorption syndrome in infancy.

[Moisture, total lipids and fatty acids in raw longissimus muscle from Venezuelan cattle]. / Contenido de humedad, lípidos totales y ácidos grasos del músculo longissimus crudo de bovinos en Venezuela.

Randomly selected groups of slaughter cattle, crossbreds of dairy (n = 14) and zebu (n = 131) types were classified by age (2.5, 3.0, 3.5 and 4.0 yr., estimated by dentition), and carcass fatness (as described by different criterion, including marbling levels) to study variation in moisture (M), lipid (L), and fatty acid (FA) contents (g/100 g of fresh tissue) of longissimus muscle trimmed to zero fat cover. Overall means +/- standard deviations per 100 g of raw product for M and L were 73.9 +/- 1.36 and 2.9 +/- 1.04, respectively. Analyses of variance by the least squares (LS) method showed age, breed type, marbling, backfat thickness and carcass finish affected (p < 0.05) fatty acid (FA) profiles. The oldest cattle group (4 yr. or older) trended to present a lower intramuscular lipid content (2.72 g/100 g) and showed the highest (2.04) unsaturation (unsaturated/saturated FA) index (p < 0.05). Breed type had little effect on the FA profile. Comparison of LS means showed intramuscular concentrations of myristic and linolenic acids were slightly higher in samples from dairy types (p < 0.05). Carcasses with poor, "patch-like" fat distribution, showed muscles with the highest (0.16) polyunsaturated/saturated FA index (p < 0.05). Unsaturation indexes for trimmed beef samples with the prevailing marbling levels (1.76 for "Traces" to 1.92 for "Devoid") show a clear predominance of unsaturates, relatively larger than that estimated from compositional FA data reported for the same cut in the United States.

Note: "Lock-in accelerometry" to follow sink dynamics in shaken granular matter.

Understanding the penetration dynamics of intruders in granular beds is relevant not only for fundamental physics, but also for geophysical processes and construction on sediments or granular soils in areas potentially affected by earthquakes. While the penetration of intruders in two dimensional (2D) laboratory granular beds can be followed using video recording, this is useless in three dimensional (3D) beds of non-transparent materials such as common sand. Here, we propose a method to quantify the sink dynamics of an intruder into laterally shaken granular beds based on the temporal correlations between the signals from a reference accelerometer fixed to the shaken granular bed, and a probe accelerometer deployed inside the intruder. Due to its analogy with the working principle of a lock-in amplifier, we call this technique lock-in accelerometry.

Prescripción inadecuada y efectos adversos a medicamentos en pacientes de edad avanzada / Inappropriate drug prescription and adverse drug effects in elderly patients

Objetivos. La prescripción inadecuada de medicamentos se ha relacionado con el aumento de las tasas de hospitalización y la aparición de efectos adversos. Hemos examinado los fármacos de prescripción inadecuada que reciben los pacientes de edad avanzada que ingresan en el hospital, así como la frecuencia y gravedad de los eventos adversos relacionados con ellos. Pacientes y método. Estudio prospectivo en pacientes mayores de 65 años, ingresados en un servicio de Medicina Interna, en quienes se identificó al menos un fármaco de prescripción inadecuada (criterios de Beers y STOPP [Screening Tool of Older Person′s Prescriptions]), en régimen ambulatorio y/o en las primeras 48 de su hospitalización. La relación de los eventos adversos con los fármacos de prescripción inadecuada se estableció según el algoritmo de Naranjo. Resultados. Se incluyeron 97 pacientes con una edad media de 81 años (rango: 66-101). El total de medicamentos prescritos durante la hospitalización fue de 865, con una media de 9 fármacos (rango: 3-16). Un 32% de los enfermos estaba siendo tratado con más de 10 fármacos. Se identificaron un total de 153 (17,7%) fármacos de prescripción inadecuada. Se produjeron 26 reacciones adversas a medicamentos, de las cuales 18 (69%) se relacionaron con fármacos de prescripción inadecuada. La digoxina y el lorazepam fueron los fármacos de prescripción inadecuada más comunes y con los que se relacionaron un mayor número de reacciones adversas a medicamentos. El 56% de estas reacciones se consideraron graves. Los pacientes institucionalizados recibían más fármacos, pero no más fármacos de prescripción inadecuada. Conclusiones. En pacientes de edad avanzada, la frecuencia de reacciones adversas a medicamentos en relación con fármacos de prescripción inadecuada es elevada. La implementación de estrategias para identificar las prescripciones inadecuadas y para utilizar estos fármacos apropiadamente en pacientes de edad avanzada es necesaria(AU)

Aims. Inappropriate drug prescription (IP) has been related to higher hospitalization rates and development of adverse drug effects (ADE). We have studied the inappropriate drug prescriptions given to elderly patients admitted to the hospital and the frequency and severity of the adverse events related with them. Patients and methods. A prospective study was conducted in a sample of 100 patients over 65 years admitted in an Internal Medicine Department in whom at least one inappropriate drug prescription (Beers and STOPP (B-S) criteria [Screening Tool of Older Person′s Prescriptions]) as outpatients or during the first 48hours after the admission. The relationship of the adverse events with the inappropriate drug prescription was established using the Naranjo algorithm. Results. A total of 97 patients, mean age 81 years (range 66-101) were included. The total amount of medicines prescribed during the hospital stay was 865, average of 9 (range 3-16). Thirty two percent was being treated with more than 10 drugs. A total of 153 (17.7%) were B-S drugs. There were 26 ADEs, 18 related with B-S drugs. Digoxin and lorazepam were the IP drugs most frequently prescribed and those related with a larger number of ADE. Fifty six percent of the ADEs were considered severe. Institutionalized elderly patients were treated with more drugs, but not more B-S medicaments. Conclusions. The frequency of ADEs related to IP is very high in the elderly. It is necessary to implement strategies to identify, and use properly these drugs in elderly population(AU)