Several Seiridium species (Sporocadaceae: Xylariales) cause cypress canker in South Africa.

Cypress canker is an important fungal disease caused by at least seven different Seiridium species. The disease has been known on Cupressaceae trees in South Africa since the 1980's, but its relevance was recently accentuated with an outbreak on native Widdringtonia nodiflora trees in the Western Cape. The causal agent, S.

Four new Geosmithia species from bark beetles infesting indigenous South African trees.

Over the past two decades, numerous Geosmithia fungi have been isolated from the bodies and galleries of wood-boring beetles. However, this genus of asexual Sordariomycetes remains taxonomically and ecologically understudied, especially in the Southern Hemisphere. In South Africa, two prior surveys reported Geosmithia species from bark beetles, but neither thoroughly investigated species identities.

Amygdala activity after subchronic escitalopram administration in healthy volunteers: A pharmaco-functional magnetic resonance imaging study.

Background: Selective serotonin reuptake inhibitors (SSRIs) are used for the treatment of several conditions including anxiety disorders, but the basic neurobiology of serotonin function remains unclear. The amygdala and prefrontal cortex are strongly innervated by serotonergic projections and have been suggested to play an important role in anxiety expression. However, serotonergic function in behaviour and SSRI-mediated neurobiological changes remain incompletely understood.