No abstract

The prevalence, natural history, and genetic characteristics of simian immunodeficiency virus (SIV) infections in most feral African monkey species are presently unknown, yet this information is essential to elucidate their origin and relationship to other simian and human immunodeficiency viruses. In this study, a combination of classical and molecular approaches were used to identify and characterize SIV isolates from West African green monkeys (Cercopithecus sabaeus) (SIVagm isolates). Four SIVagm viruses from wildcaught West African green monkeys were isolated and analyzed biologically and molecularly. Amplification, cloning, and sequencing of a 279-bp polymerase fragment directly from uncultured peripheral blood mononuclear cells was facilitated by the use of nested polymerase chain reaction. The results indicated that West African green monkeys are naturally infected with SIVs which are closely related to East African SIVagm isolates. However, structural, antigenic, and genetic differences were observed which strongly suggest that the West African green monkey viruses comprise a phylogenetically distinct subgroup of SIVagm. These findings support our previous hypothesis that SIVagm viruses may have evolved and diverged coincident with the evolution and divergence of their African green monkey host. In addition, this study describes a polymerase chain reaction-based approach that allows the identification and molecular analysis of divergent SIV strains directly from primary monkey tissue. This approach, which does not depend on virus isolation methods, should facilitate future studies aimed at elucidating the origins and natural history of SIVs in feral African green monkey populations.

Links between peer relationship difficulties, parental social coaching, and social anxiety were examined among young adolescents (N = 80). In a lab protocol simulating peer stress, adolescents led a 3-min conversation, while ostensibly being evaluated by (fictitious) peer judges. Parental coaching was measured via observed cognitive framing and advice-giving; parents also reported on their facilitation of access to peers, and their adolescent's peer victimization and rejection. Social anxiety was measured through both global-and contextspecific reports. More socially anxious youths (1) experienced more peer rejection and (2) had parents who engaged in poorer quality coaching (i.e., lower prosocial advice, benign interpretation, and facilitation). Evidence of additive effects of peer problems and parenting was found, and the pattern of findings was similar after controlling for adolescent social skills. Results suggest that both negative peer experiences and parental coaching may need to be targeted to reduce social anxiety during early adolescence.

No abstract