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Search Results: 1 - 6 of 6 matches for " JGC; "
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Isolation and Identification of 9-methylgermacrene-B as the Putative Sex Pheromone of Lutzomyia cruzi (Mangabeira, 1938) (Diptera: Psychodidae)
Brazil, Reginaldo P;Hamilton, JGC;
Memórias do Instituto Oswaldo Cruz , 2002, DOI: 10.1590/S0074-02762002000300030
Abstract: lutzomyia (lutzomyia) cruzi has been named as a probable vector of leishmania chagasi in corumbá, mato grosso do sul, brazil. taxonomically l. cruzi is closely related to the l. longipalpis species complex. females of l. cruzi and l. longipalpis are morphologically indistinguishable and associated males must be examined carefully to confirm identifications. chemical analysis hexane extracts of male l. cruzi has revealed the presence of a 9-methylgermacrene-b (c16), a homosesquiterpene (mw 218) previously shown to be the sex pheromone of one of the members of the l. longipalpis species complex.
Isolation and Identification of 9-methylgermacrene-B as the Putative Sex Pheromone of Lutzomyia cruzi (Mangabeira, 1938) (Diptera: Psychodidae)
Brazil Reginaldo P,Hamilton JGC
Memórias do Instituto Oswaldo Cruz , 2002,
Abstract: Lutzomyia (Lutzomyia) cruzi has been named as a probable vector of Leishmania chagasi in Corumbá, Mato Grosso do Sul, Brazil. Taxonomically L. cruzi is closely related to the L. longipalpis species complex. Females of L. cruzi and L. longipalpis are morphologically indistinguishable and associated males must be examined carefully to confirm identifications. Chemical analysis hexane extracts of male L. cruzi has revealed the presence of a 9-methylgermacrene-B (C16), a homosesquiterpene (mw 218) previously shown to be the sex pheromone of one of the members of the L. longipalpis species complex.
Courtship behaviour of Phlebotomus papatasi the sand fly vector of cutaneous leishmaniasis
Chelbi Ifhem,Bray DP,Hamilton JGC
Parasites & Vectors , 2012, DOI: 10.1186/1756-3305-5-179
Abstract: Background The sand fly Phlebotomus papatasi is an Old World vector of Leishmania major, the etiologic agent of zoonotic cutaneous leishmaniasis. This study describes the courtship behaviour of P. papatasi and compares it with that of Lutzomyia longipalpis, the New World vector of visceral leishmaniasis. Understanding the details of courtship behaviour in P. papatasi may help us to understand the role of sex pheromones in this important vector. Results P. papatasi courtship was found to start with the female touching the male, leading him to begin abdomen bending and wing flapping. Following a period of leg rubbing and facing, the male flaps his wings while approaching the female. The female then briefly flaps her wings in response, to indicate that she is willing to mate, thereby signaling the male to begin copulation. Male P. papatasi did not engage in parading behaviour, which is performed by male L. longipalpis to mark out individual territories during lekking (the establishment and maintenance of mating aggregations), or wing-flap during copulation, believed to function in the production of audio signals important to mate recognition. In P. papatasi the only predictor of mating success for males was previous copulation attempts and for females stationary wing-flapping. By contrast, male L. longipalpis mating success is predicted by male approach-flapping and semi-circling behaviour and for females stationary wing-flapping. Conclusions The results show that there are important differences between the mating behaviours of P. papatasi and L. longipalpis. Abdomen bending, which does not occur in L. longipalpis, may act in the release of sex pheromone from an as yet unidentified site in the male abdomen. In male L. longipalpis wing-flapping is believed to be associated with distribution of male pheromone. These different behaviours are likely to signify significant differences in how pheromone is used, an observation that is consistent with field and laboratory observations.
Genetic aspects of meat quality and stress resistance in experiments with various breeds and breed crosses
P Walstra, D Minkema, W Sybesma, JGC Pas
Genetics Selection Evolution , 1972, DOI: 10.1186/1297-9686-4-1-133a
Abstract:
Identification of sex pheromones of Lutzomyia longipalpis (Lutz & Neiva, 1912) populations from the state of S?o Paulo, Brazil
Casanova, Cláudio;Hamilton, JGC;Trigo, JR;Costa, Antonio IP;
Memórias do Instituto Oswaldo Cruz , 2006, DOI: 10.1590/S0074-02762006000100023
Abstract: in brazil, four populations of lutzomyia longipalpis each producing different sex pheromones are recognised. it has been suggested that these chemotype populations represent true sibling species. in this study we present the results of an analysis, by coupled gas cromotography - mass spectrometry, of the pheromones of males l. longipalpis from two different municipalities of the state of s?o paulo. our study showed that l. longipalpis from these two municipalities produced different sex pheromones from each other. this coupled with the remarkable difference between the epidemiological situation in ara?atuba and espírito santo do pinhal, suggests that the (s)-9-methylgermacrene-b and cembrene-1 populations may have different vectorial capacities.
MRSA outbreak at a transplantation unit
Romanelli, RMC;Clemente, WT;Lima, SSS;Rezende, EM;Martinho, GH;Paiva, LFR;Neves, FAC;Madeira, JGC;Amancio, GCS;Lima, AS;Faria, LC;Coutinho, RL;
Brazilian Journal of Infectious Diseases , 2010, DOI: 10.1590/S1413-86702010000100011
Abstract: methicillin-resistant staphylococcus aureus (mrsa) infections frequently complicate the post-operative course of transplant recipients, and despite nasal carriage and endemic colonization, mrsa outbreaks are not commonly described. this study reports a case of mrsa outbreak and discusses infection control measures and recommendations for this situation.
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