نتایج جستجو برای: periplaneta americana

تعداد نتایج: 7534  

Journal: :iranian journal of public health 0
a ahmed k minhas namood-e-sahar o aftab f sher khan

background : cockroaches have been recognized as a powerful indoor allergen. cockroach allergy can be a major factor in seri­ous asthma and nasal allergy. bioinformatics tools have been developed to identify potential allergens. the present study was conducted to identify potential allergens in  periplaneta americana (linnaeus). methods : the study focused on the identification of potential all...

Journal: :archives of clinical infectious diseases 0
hamid kassiri department of medical entomology and vector control, ahvaz jundishapur university of medical sciences, ahvaz, ir iran; department of medical entomology and vector control, ahvaz jundishapur university of medical sciences, ahvaz, ir iran. tel: +98-6113738269, fax: +98-6113738282 ali kasiri department of ophthalmology, ahvaz jundishapur university of medical sciences, ahvaz, ir iran anvar quaderi department of medical entomology and vector control, ahvaz jundishapur university of medical sciences, ahvaz, ir iran

conclusions the results showed that p. americana is a possible reservoir and potential vector of some pathogenic agents. results one hundred percent of cockroaches had bacterial infections. culturing of the external parts wash homogenates resulted in the isolation of escherichia coli, proteus, serratia, klebsiella, enterobacter, pseudomonas, staphylococcus aureus, streptococcus, enterococcus, c...

Journal: :Journal of morphology 1976
R Schafer T V Sanchez

Sexual dimorphism in the distribution of antennal sense organs is common among adults of the genus Periplaneta. In three out of the four strains of Periplaneta americana examined, adult males had more contact chemoreceptros than females. In the fourth strain of P. americana and in P. australasiae, P. brunnea, P. fuliginosa, and P. japonica, no statistically supportable sexual dimorphism of cont...

Journal: :iranian journal of public health 0
hr basseri n emmami r haji-hosseini m abolhasani a moradi

background: although cockroaches are mechanical vector of many pathogens, still biological transmission of pathogens via these insects is controversial. more covenant immune defense in the hemolymph of cockroaches may take this ad­vantage to block any adaptation of pathogens regarding to biological transmission. lectin molecules in hemolymph of in­sects play as mediators of nonself recognition,...

2005
ROLLIE SCHAFER

Male cockroaches of the species Periplaneta americana rely on a female-produced airborne pheromone to initiate courting behavior, The male responds to the presence of the pheromone with rapid, oriented locomotion. Contact with the female (or other males or larvae) elicits wing-raising and other responses characteristic of male courtship behavior. Males of other species within the genus Periplan...

Journal: :نامه انجمن حشره شناسی ایران 0
اعظم میکانی دانشکده کشاورزی دانشگاه تربیت مدرس

the effect of a neuropeptide, the tachykinin on α-amylase, protease and lipase activities in the midgut of american cockroach, periplaneta americana (linnaeus) is evaluated . immunohistochemical reactivities against tachykinin (tachykinin- ir) were detected in the midgut. tachykinin-ir cells in three regions (anterior, median and posterior) of the midgut were counted in normally fed, starved fo...

Journal: :The Medical journal of Malaysia 1983
L Rampal P Oothuman J Jeffery M Z Daud C Shekhar P Senan L K Eow Y Suboh Z Ahmad

Zuleha Ahmad, Medical Technologist, Department of Microbiology, Medical Faculty, National University of Malaysia, P. O. Box 2418, Kuala Lumpur, Malaysia. SUMMARY Bacterial isolates were made from the intestinal tracts ofcarious species of cockroaches (Periplaneta americana, Periplaneta brunnea, Periplaneta australasiae, Neostylopyga rhombifolia, Nauphoeta cinerea) trapped from hitchens and stor...

Journal: :Zeitschrift fur Naturforschung. C, Journal of biosciences 2000
J Schmidt K Richter B Voigt G Adam

After feeding of 24-epi-castasterone to the cockroach Periplaneta americana an organ-specific epimerization of the brassinosteroid to 2,24-diepi-castasterone could be detected in female insects. The metabolite being observed only in the ovaries and not in the testes of the insect was identified by GC/MS in comparison with a synthesized authentic sample. Contrary, 24-epi-brassinolide is not meta...

2015
Christoph von Beeren Mark Y. Stoeckle Joyce Xia Griffin Burke Daniel J. C. Kronauer

DNA barcoding promises to be a useful tool to identify pest species assuming adequate representation of genetic variants in a reference library. Here we examined mitochondrial DNA barcodes in a global urban pest, the American cockroach (Periplaneta americana). Our sampling effort generated 284 cockroach specimens, most from New York City, plus 15 additional U.S. states and six other countries, ...

2013
Jürgen Schmidt Günter Adam

After feeding of 24-ep/-castasterone to the cockroach Periplaneta americana an organspecific epimerization of the brassinosteroid to 2,24-d/ep/-castasterone could be detected in female insects. The metabolite being observed only in the ovaries and not in the testes of the insect was identified by GC/MS in comparison with a synthesized authentic sample. Con­ trary, 24-ep/-brassinolide is not met...

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