The many forms of a pleomorphic bacterial pathogen-the developmental network of Legionella pneumophila.

Legionella pneumophila is a natural intracellular bacterial parasite of free-living freshwater protozoa and an accidental human pathogen that causes Legionnaires' disease. L. pneumophila differentiates, and does it in style.

Deletion of potD, encoding a putative spermidine-binding protein, results in a complex phenotype in Legionella pneumophila.

L. pneumophila is an intracellular pathogen that replicates in a membrane-bound compartment known as the Legionella-containing vacuole (LCV). We previously observed that the polyamine spermidine, produced by host cells or added exogenously, enhances the intracellular growth of L.

Efficacy of two fungus-based biopesticide against the honeybee ectoparasitic mite, Varroa destructor.

The varroa mite, Varroa destructor (Anderson and Trueman) (Acari: Varroidae), is known as the most serious ectoparasitic mite on honeybee, Apis mellifera (Hymenoptera: Apidae) in the world. Based on the spores of entomopathogenic fungi, two commercial preparations; Bioranza (Metarhizium anisopliae) and Biovar (Beauveria bassiana) were evaluated through application into the hives against varroa mite. Data showed significant differences between treatments with Bioranza and Biovar, the results were significant after 7 and 14 days post-treatment.

The progeny of Legionella pneumophila in human macrophages shows unique developmental traits.

The Gram-negative bacterium Legionella pneumophila is an intracellular parasite of amoebae and an accidental human pathogen that causes a noncommunicable atypical pneumonia known as Legionnaires' disease (LD). In some mammalian cells (e.g.

Insect predators and control of Aphis gossypii comparing to certain insecticides under caged-cotton plants conditions.

Numerous beneficial arthropods prey on aphid populations in cotton fields. Field experiments were conducted at Kafr El-Sheikh Governorate, Egypt in seasons of 2010 and 2011 to examine the impact of naturally occurring insect predators on cotton aphid, Aphis gossypii Glover (Homoptera: Aphididae) comparing to the impact of three insecticides; i.e.