All-female, parthenogenetic species afford a unique test of hypotheses regarding the nature and evolution of sexuality. Mating behavior accomplishes the transfer of gametes and stimulates the coordination of reproductive activity of the male and female. Cnemidophorus uniparens, a parthenogenetic species, is believed to have resulted from the hybridization of two extant gonochoristic species, Cn...

that recrudescence of congenital Toxoplasma infection is mainly associated with ocular, rather than brain, lesions. Due t o their relative dimensions, minimal inflammatory lesions in the brain may not be discemible clinically; in the retina, however, a similar effect may induce a sight-threatening lesion13. It should be noted that acute fatal toxoplasmosis can occur in animals other than the gu...

UNLABELLED We describe 2 cases in which clinically significant epithelial ingrowth was removed by debridement and followed by the use of a hydrogel sealant (Resure) to seal the flap edge. In both cases, the epithelial ingrowth was seen after otherwise uneventful laser in situ keratomileusis retreatment. The visual outcomes were good with no recrudescence of interface epithelium. FINANCIAL DIS...

Background TNFR1 and TNFR2 are receptors for the pro-inflammatory chemokine TNFa. Inflammation of the temporomandibular joint (TMJ) and hypersensitivity were induced in mice lacking both TNFa receptors (TNFR1/R2 -/-). After recovery from this initial priming TMJ insult lasting less than a week, a gastrointestinal (GI) chemical irritation is administered 3 weeks later. This “double-hit” initiate...

L’émergence du « tourisme chamanique » dans certaines zones urbaines et des villages shipibo-konibo est à l’origine d’une recrudescence pratiques sorcellaires vernaculaires, désormais intégrées au nouveau contexte sociologique de commercialisation chamanisme végétaliste local. Ces attaques occultes visent non seulement praticiens rivaux mais aussi touristes en quête expérience hallucinogène, do...

A seminatural, factorial-design experiment was used to quantify dynamics of the pathogen Mycoplasma agassizii and upper respiratory tract disease in the Mojave desert tortoise (Gopherus agassizii) over 2 years. Groups of initially healthy animals were separated into serologically positive (seropositive), seronegative, and artificially infected groups and paired into 23 pens. We found no evidenc...

Myotis nigricans is a species of vespertilionid bat, whose males show two periods of total testicular regression within the same annual reproductive cycle in the northwest São Paulo State, Brazil. Studies have demonstrated that its epididymis has an elongation of the caudal portion, which stores spermatozoa during the period of testicular regression in July, but that they had no sperm during th...