Point-of-Care Ultrasound of a Nasal Septal Abscess.

Although nasal septal abscesses (NSA) are rare, complications can be significant and devastating. Thus, timely diagnosis of NSA is critical. In this case report, we describe the use of point-of-care ultrasound in diagnosing NSA in a healthy boy presenting with viral upper respiratory infection symptoms and fever.

Suppressing mosquito populations with precision guided sterile males.

The mosquito Aedes aegypti is the principal vector for arboviruses including dengue/yellow fever, chikungunya, and Zika virus, infecting hundreds of millions of people annually. Unfortunately, traditional control methodologies are insufficient, so innovative control methods are needed. To complement existing measures, here we develop a molecular genetic control system termed precision-guided sterile insect technique (pgSIT) in Aedes aegypti.

Red muscle activity in bluegill sunfish Lepomis macrochirus during forward accelerations.

Fishes generate force to swim by activating muscles on either side of their flexible bodies. To accelerate, they must produce higher muscle forces, which leads to higher reaction forces back on their bodies from the environment. If their bodies are too flexible, the forces during acceleration could not be transmitted effectively to the environment, but fish can potentially use their muscles to increase the effective stiffness of their body.

Hydrodynamics of linear acceleration in bluegill sunfish, .

In their natural habitat, fish rarely swim steadily. Instead they frequently accelerate and decelerate. Relatively little is known about how fish produce extra force for acceleration in routine swimming behavior.