Molecular evidence of Bartonella infection in domestic dogs from Algeria, North Africa, by polymerase chain reaction (PCR).

Bartonella species are being recognized as important bacterial human and canine pathogens, and are associated with multiple arthropod vectors. Bartonella DNA extracted from blood samples was obtained from domestic dogs in Algiers, Algeria. Polymerase chain reaction (PCR) and DNA sequence analyses of the ftsZ gene and the 16S-23S intergenic spacer region (ITS) were performed.

[Ultrastructural characterization of the ovarian stages of the worker bee, Apis mellifera mellifera Linné (Hymenoptera, Apidae)].

The classification of the ovarian stages remains still vague. The ultrastructure of the basal follicle made it possible to solve this problem. From the sixth to the eighth day of the worker bee's adult life, the length of the ovariole hardly exceeds 2 mm.