Post and beam connection, PNG Coffee Industry Board Office and Warehouse, Goroka

Detailed view of cast iron brackets connecting beams and posts.

Post and beam connection, PNG Coffee Industry Board Office and Warehouse, Goroka

Detailed view of cast iron brackets connecting beams and posts.

Hallway, Nerang Post Office, Nerang

View along hallway past restrooms, on lower level.

Entrace, Nerang Post Office, Nerang

View past entrance ramp to entrance stair.

Nerang Post Office, Nerang

View to northern elevation from rear car park.

Entrance, Nerang Post Office, Nerang

View of entrance on southern elevation.

Entrance, Nerang Post Office, Nerang

View of main entrance from exterior.

Nerang Post Office, Nerang

View to northern elevation from car park.

North elevation, Nerang Post Office, Nerang

View of north elevation, sorting area above, staff area below.

Nerang Post Office, Nerang

View to southern elevation from exterior.

Nerang Post Office, Nerang

View to northern elevation from rear car park.

Nerang Post Office, Nerang

View to northern elevation from exterior.

Modification of arthropod vector competence via symbiotic bacteria

Some of the world's most devastating diseases are transmitted by arthropod vectors. Attempts to control these arthropods are currently being challenged by the widespread appearance of insecticide resistance. It is therefore desirable to develop alternative strategies to complement existing methods of vector control. In this review, Charles Beard, Scott O'Neill, Robert Tesh, Frank Richards and Serap Aksoy present an approach for introducing foreign genes into insects in order to confer refractoriness to vector populations, ie. the inability to transmit disease-causing agents. This approach aims to express foreign anti-parasitic or anti-viral gene products in symbiotic bacteria harbored by insects. The potential use of naturally occurring symbiont-based mechanisms in the spread of such refractory phenotypes is also discussed.