| entomological fauna from reserva biológica do atol das rocas, rn, brazil: i. morphospecies composition. | atol das rocas, the unique atoll in the south-western atlantic, is located 144 nautical miles (266 km) northeast from the city of natal, ne brazil and 80 nautical miles from arquipélago de fernando de noronha, with geographic co-ordinates 3 masculine51's and 33 masculine49"w. it's of volcanic origin and coralline formation. the reef is ellipsoid, its largest axis (e-w) is approximately 3.7 km long, and the shortest (n-s) is 2.5 km. inside the lagoon, there are two islands: the ilha do farol and ... | 2000 | 10959113 |
| neurotoxic activity and ultrastructural changes in muscles caused by the brown widow spider latrodectus geometricus venom. | brown widow spider (latrodectus geometricus) venom (brwsv) produces few local lesions and intense systemic reactions such as cramps, harsh muscle pains, nausea, vomiting and hypertension. approximately 16 protein bands under reducing conditions and approximately 14 bands under non-reducing conditions on a 12.5% sodium dodecyl sulfate-polyacrylamide gel electrophoresis were observed. neurotoxic clinical manifestations were confirmed in vivo, while proteolytic activity was demonstrated on gelatine ... | 2009 | 19390738 |
| recruitment and diversification of an ecdysozoan family of neuropeptide hormones for black widow spider venom expression. | venoms have attracted enormous attention because of their potent physiological effects and dynamic evolution, including the convergent recruitment of homologous genes for venom expression. here we provide novel evidence for the recruitment of genes from the crustacean hyperglycemic hormone (chh) and arthropod ion transport peptide (itp) superfamily for venom expression in black widow spiders. we characterized latrodectin peptides from venom gland cdnas from the western black widow spider (latrod ... | 2013 | 24316130 |
| first case of human latrodectism in venezuela. | the first case of envenoming by latrodectus geometricus in venezuela is described. the accident occurred at the victims home, in aragua de barcelona, anzoátegui state. the 31-year-old female victim was bitten twice on the left scapular region, in quick succession (within seconds). she developed a hyperactive state of the central, autonomic and peripheral nervous systems with minor local symptoms. | 2008 | 18545846 |
| the black widow spider genus latrodectus (araneae: theridiidae): phylogeny, biogeography, and invasion history. | the spider genus latrodectus includes the widely known black widows, notorious because of the extreme potency of their neurotoxic venom. the genus has a worldwide distribution and comprises 30 currently recognized species, the phylogenetic relationships of which were previously unknown. several members of the genus are synanthropic, and are increasingly being detected in new localities, an occurrence attributed to human mediated movement. in particular, the nearly cosmopolitan range of the brown ... | 2004 | 15120405 |
| activities against hemostatic proteins and adrenal gland ultrastructural changes caused by the brown widow spider latrodectus geometricus (araneae: theridiidae) venom. | brown widow spider (brws) (latrodectus geometricus) venom produces intense systemic reactions such as cramps, harsh muscle nociceptive, nauseas, vomiting and hypertension. the proposed pathogenic mechanisms resulting in these accidents have principally been damages occurring at the nervous system. however, it is suspected that there is also damage of the adrenal glands, as a result of the experimental animal's clinical manifestations, which developed symptoms compatible with acute adrenal insuff ... | 2010 | 19755172 |
| additions to the known u.s. distribution of latrodectus geometricus (araneae: theridiidae). | the range of the brown widow spider latrodectus geometricus c. l. koch includes much of africa and south and central america. this medically important spider has been recently introduced to japan, indonesia, papua new guinea, australia, hawaii, and california. after the identification of the brown widow spider in new orleans, la, and southern mississippi, surveys in the southeastern united states were conducted from the fall of 2006 through february 2008. we found populations of brown widow spid ... | 2008 | 18826042 |