Selection and characterization of human respiratory syncytial virus escape mutants resistant to a polyclonal antiserum raised against the F protein.

A human respiratory syncytial virus (HRSV) neutralization escape mutant was obtained after 56 serial passages in the presence of a polyclonal antiserum raised against the F protein. Nucleotide sequence analysis of this escape mutant virus revealed two amino acid substitutions: Asn268Ile and Val533Met. When this virus was allowed to grow in the absence of the anti-F polyclonal serum, only the mutation Asn268Ile was stably maintained.

[Mental health and anxiety in community health agents in Uberlândia (MG, Brazil)].

Unlabelled: The scope of this research, carried out together with community-based health workers (ACS) was: (1) to evaluate the mental health of the ACS; (2) to describe the vital events in the last year of the ACS; (3) to inquire about the level of anxiety of the ACS; (4) to correlate mental health, vital events and anxiety of the ACS.

Participants: 116 ACS.

Measurements: socio-demographic questionnaire, Goldberg General Health Questionnaire, The Life Events Inventory, State-Trait Anxiety Inventory.

In vivo behaviour of two different biphasic ceramic implanted in mandibular bone of dogs.

Alloplastic calcium phosphate bone substitutes such as hydroxyapatite (HA) and tricalcium phosphate (TCP) have been studied extensively due to their composition closely resembling the inorganic phase of bone tissue. On the same way, by manipulating the HA/TCP ratio it may be possible to change the substitution rate and the bioactivity of these materials, an advantage which has brought them to clinical use in oral and orthopaedic surgery. In this work, we evaluated the histological response in bone of two biphasic calcium phosphate ceramics by varying the proportion of their components.