Leishmaniasis develops after parasites establish themselves as amastigotes inside mammalian cells and start replicating. As relatively few parasites survive the innate immune defence, intracellular amastigotes spreading towards uninfected cells is instrumental to disease progression. Nevertheless the mechanism of Leishmania dissemination remains unclear, mostly due to the lack of a reliable mod...

Background: Crataegus mexicana, Hyptis albida, Larrea tridentata, Ocimum baislicum, Prunus serotina, and Smilax spp. are used in Mexican traditional medicine to treat respiratory and gastrointestinal diseases such as flu, cough, diarrhea, dysentery, and other parasitic or microbial infections. Therefore this study was aimed at the pharmacological prospection of these plants against eleven bacte...

The teosintes, the closest wild relatives of maize, are important resources for the study of maize genetics and evolution and for plant breeding. We genotyped 237 individual teosinte plants for 93 microsatellites. Phylogenetic relationships among species and subspecific taxa were largely consistent with prior analyses for other types of molecular markers. Plants of all species formed monophylet...

Three previously introduced parasitoids (Acerophagus papayae Noyes and Schauff, Anagyrus loecki Noyes and Menezes, and Pseudleptomastix mexicana Noyes and Schauff [Hymenoptera: Encyrtidae]) of the mealybug Paracoccus marginatus Williams and Granara de Willink (Hemiptera: Pseudococcidae) were studied for their host instar susceptibility and sex ratio, host instar selection, and interspecific co...

came acute, urine was suppressed, pupils dilated and the animal died at 12 a.m. on 16th February, 1951. Postmortem appearance.?Weight 11.5 lbs. Peritoneal cavity contained 10 cc. of strawcoloured fluid. Mucus membrane of stomach congested. Hemorrhagic points in the duodenum. Wall of lower jejunum and ileum thinned out, leaving only the peritoneal layer, lower down necrotic areas and acute conge...

Lookon thepositive side! Theorientation, identi¢cationand bioenergetics of ‘Archaeal’membrane-boundnitrate reductases Rosa Maria Martinez-Espinosa, Elizabeth J. Dridge, Maria J. Bonete, Julea N. Butt, Clive S. Butler, Frank Sargent & David J. Richardson División de Bioquı́mica y Biologı́a Molecular, Departamento de Agroquı́mica y Bioquı́mica, Facultad de Ciencias, Universidad de Alicante, Alicante,...

In a coastal plain forest in eastern Texas, USA, occurs a population of a putative Sabal hybrid, one of few native, putative palm hybrids in the continental USA. Robust plants with large trunks, they are morphologically dissimilar to the much smaller and acaulescent plants of S. minor, with which they co-occur. The only other large Sabal species in the USA are S. mexicana and S. palmetto, with ...