Cockroach role as vectors of many diseases, as well as allergens. Eradication using chemical insecticide with risky accumulate on foodstuffs and through inhalation and damage the environment. Annona squamosa is potentially leaves as botanical insecticide as it is more environmentally friendly. This research aims to unravel the efficacy of Annona squamosa leaves extract to kill cockroach (Peripl...

Protozoan and nematode infections of Periplaneta americana in Bulgaria were investigated. Five protozoan and 2 nematode parasites of P. americana were recorded: Endamoeba blattae, Amoeba sp., Lophomonas striata, Nyctotherus ovalis, Balantidium blattarum, Hammerschmidtiella diesingi and Leidynema appendiculatum. Parasite prevalence varied from 1,6% for Amoeba sp. to 32,8% for nematodes. Biometri...

OBJECTIVES This study aimed to investigate the profile of sensitization to silkworm moth (Bombyx mori) and other 9 common inhalant allergens among patients with allergic diseases in southern China. METHODS A total of 175 patients were tested for serum sIgE against silkworm moth in addition to combinations of other allergens: Dermatophagoides pteronyssinus, Dermatophagoides farinae, Blomia tro...

The musculature of the colleterial glands receives innervation from branch 4B4a of the nerves designated 4B, which arise from the posterior part of the terminal abdominal ganglion in the female cockroach Periplaneta americana (L). Using Methylene Blue staining, the gross anatomy of the colleterial gland innervation has been described. Cobalt backfilling via branch 4B4 of nerve 4B revealed about...

In Periplaneta americana, the large American roach, bacteriocytes are found in both sexes. These bacteriocytes are scattered throughout the fat tissue and their cytoplasm is filled with microorganisms. Evidence is presented to show that the intracellular forms are diphtheroidal bacilli. These diphtheroids are transmitted from one generation to another through the ova. A method is described wher...

American cockroaches, Periplaneta americana (Blattodea: Blattidae) (L.), are common pests of urban environments. Analyzing spatial distribution of P. americana populations in an artificial, outdoor environment provided insight of gene flow among populations collected in central Texas. This information provides a better understanding of how and if populations were segregated, or if there was a s...

Differences in the negative surface charge of haemocytes from Periplaneta americana and Schistocerca gregaria have been revealed using cell electrophoresis and cationized ferritin-binding. Although haemocyte populations from both insect species exhibit ranges of negative surface charge, both techniques show that Schistocerca haemocytes are significantly more negative than Periplaneta haemocytes...