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Archive - Feb 21, 2010

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ADVERTISEMENT—Dermatology in the Connecticut-New York-New Jersey Area

If you have a dermatologic concern, you can do no better than visiting Dr Charles Halasz in Norwalk, Connecticut, just 45 minutes north of New York City. Dr. Halasz serves patients in the tri-state area of Connecticut, New York, and New Jersey. His office is a fully-equipped psoriasis treatment center, and it offers an array of phototherapy options for treating psoriasis, cutaneous lymphoma, scleroderma, and vitiligo. Dr. Halasz, a Yale College graduate, has a medical degree from the University of Connecticut and holds an appointment as Assistant Clinical Professor at New York- Presbyterian Hospital in New York City. Dr. Halasz has over 30 years experience in dermatology and can be reached at 203-853-1874. Photo shows Dr. Halasz with his friendly and efficient office staff. Please mention BioQuick News when you call Dr. Halasz. To find out about placing your ad in BioQuick News and reaching readers in 145 countries, contact BioQuick editor Mike O’Neill at logophile2000@yahoo.com. [Dr. Halasz web site]

Parasitic Wasps May Aid Pest Control Efforts

Parasitoid wasps kill pest insects, but their existence is largely unknown to the public. Now, scientists have sequenced the genomes of three parasitoid wasp species, revealing many features that could be useful in pest control and medicine, and in the enhancement of our understanding of genetics and evolution. "Parasitic wasps attack and kill pest insects, but many of them are smaller than the head of a pin, so people don't even notice them or know of their important role in keeping pest numbers down," said Dr. John Werren, from the University of Rochester, a co-leader of the study along with Dr. Stephen Richards of the Baylor College of Medicine. "There are over 600,000 species of these amazing critters, and we owe them a lot. If it weren't for parasitoids and other natural enemies, we would be knee-deep in pest insects.” Parasitoid wasp females are like "smart bombs" that seek out and kill only specific kinds of insects, said Dr. Werren. "Therefore, if we can harness their full potential, they would be vastly preferable to chemical pesticides, which broadly kill or poison many organisms in the environment, including us." Parasitoid wasps are four times smaller than the common fruit fly. The females seek out specific insect, tick, or mite hosts, inject venom and lay their eggs, with the wasp young emerging to devour the host insect; traits that make the wasps valuable assets as agents for biological control. Although their size is insignificant, the importance of parasitoid wasps in the control of populations of agricultural pests is crucial. Thanks to these insects billions of dollars’ worth of crops is saved each year.

Carnivorous Plants May Yield Anti-Fungal Compounds

The sticky liquid-filled pitchers of carnivorous plants contain anti-fungal compounds that may prove useful for combating fungal diseases in humans, according to research being carried out at Tel Aviv University in Israel. "To avoid sharing precious food resources with other micro-organisms such as fungi, the carnivorous plant has developed a host of agents that act as natural anti-fungal agents," said Dr. Aviah Zilberstein, an author of the report. "In the natural habitat of the tropics, competition for food is fierce, and the hot, moist environment is perfect for fungi, which would also love to eat the plant's insect meal.” In a study conducted together with Dr. Haviva Eilenberg, Dr.Esther Segal, and Dr. Shmuel Carmeli; Dr. Zilberstein and her colleagues found that unusual secondary metabolites from the pitchers of the carnivorous Nepenthes khasiana plant (originally found in India) were effective against pathogens responsible for widespread fungal infections of people in hospitals. "The pitcher of the carnivorous plant produces these compounds in a gland," said Dr. Zilberstein. Until now, no one has published or discussed the anti-fungal metabolites found in the trap liquid of this plant, she said. Currently there is a need for additional, broadly effective anti-fungal drugs. Even mildly severe forms of athlete's foot or other skin fungal infections lack effective treatments. The problem becomes more severe at hospitals, where thousands of Americans die each year from secondary fungal infections they acquire during their stays as patients.