Ulla Gordon

Ulla Gordon
Biogents · Contract Research & Development

Dr. rer. nat., Dipl. Biol.

About

24
Publications
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650
Citations

Publications

Publications (24)
Poster
Full-text available
The region south of the Alps, where the Asian Tiger Mosquito, Aedes albopictus, is well established, is also a popular vacation destination for Central Europeans. Transalpine highways connect the Mediterranean and Central Europe and often pass through Bavaria or its western neighbour, Baden-Württemberg. Starting in 2012, the German Federal Environm...
Poster
Full-text available
The BG-Counter is an autonomous new smart mosquito trap station that automatically differentiates mosquitoes from other insects, counts them, and wirelessly transmits results to a cloud server. Based on the industry-standard BG Sentinel, the BG-Counter enables real-time alerting as well as prediction models and historical analysis of infested areas...
Article
Full-text available
The increase in insecticide resistant mosquito populations necessitates the exploration of novel vector control intervention measures. Push-pull strategies for insect control have been successful when used in integrated crop pest management. Through the combinatory use of deterring and attracting stimuli, the abundance of insect pests can be change...
Article
Full-text available
Surveillance of malaria vectors in Africa is most often accomplished using CDC-type light traps or human landing catches (HLCs). Over the past 30 yr, a variety of commercial and experimental mosquito traps have been developed for residential mosquito control or for improved surveillance of disease vector species, including the BG Sentinel (BGS) tra...
Article
Full-text available
During routine surveillance for invasive mosquitoes in southern Germany, using BG-Sentinel traps that were run continuously for one to two weeks, specimens were often damaged which prevented morphological species identification. We used DNA sequencing of the COI gene for molecular identification of damaged specimens, and observed two individuals fr...
Chapter
Nicht gegen alle vektoriell übertragenen Krankheiten gibt es die Möglichkeit einer medikamentösen Prophylaxe oder Impfung. Für den Reisenden ist es daher besonders wichtig, sich vor Stichen von krankheitsübertragenden Gliedertieren (Vektoren) zu schützen. Eine effektive Stichprophylaxe setzt gewisse Kenntnisse zur Biologie und Verbreitung der in Fr...
Article
Full-text available
A protocol has been developed for the indoor evaluation of candidate spatial repellents intended for use in push and pull systems. Single treatments (catnip oil, 1-methylpiperazine, and homopiperazine) and a mixture of catnip oil and homopiperazine were tested with yellow-fever mosquitoes (Aedes aegypti) in Y-tube olfactometers to determine 1) if t...
Article
Full-text available
Background: The interplay between global warming and invasive arthropods in temperate zones is of utmost interest in terms of the potential expansions of vector-borne diseases. Up to now, investigations on the recent establishment of mosquito vectors have focused on temperatures during their phases of activity. However, cold temperatures may also...
Data
Surface air temperature at night in Europe on one of the coldest nights in winter 2011, which was one of the coldest winters of the last decade (2011-02-23; http://daac.gsfc.nasa.gov/giovanni, [45]). This map shows where the distribution limits of aedine species in Europe are to be expected due to their minimum survival temperature of eggs. In the...
Article
A simple and efficient method was developed for the synthesis of para-Menthane-3,8-diol (PMD), a well-known repellent active against mosquitoes, from Eucalyptus citriodora essential oil by a treatment of citric acid in a biphasic medium (H2O/essential oil). The E. citriodora contains as main component (+)-citronellal (74% in the present case), whic...
Article
Full-text available
We have developed a novel test cage and improved method for the evaluation of mosquito repellents. The method is compatible with the United States Environmental Protection Agency, 2000 draft OPPTS 810.3700 Product Performance Test Guidelines for Testing of Insect Repellents. The Biogents cages (BG-cages) require fewer test mosquitoes than conventio...
Article
In order to reduce the risk of getting infected with any epidemic disease transmitted by mosquitoes, repellent products are often used to protect populations at risk. The repellent potential of 19 essential oils from the island of Corsica, France, was evaluated in a bio-assay with the mosquito Aedes aegypti, in order to assess the space repellent p...
Article
The aim of this work is to develop a new generation of repellent products with a long-lasting protection based on a natural component, para-menthane-3,8-diol (PMD). The active is first rendered soluble in a surfactantless microemulsion (H(2)O/(i)PrOH/PMD) and then in classical microemulsions. The presence of self-associated nanostructures is detect...
Article
Full-text available
Seven proprietary repellent formulations (3 hydro-alcoholic spray solutions and 4 skin lotions) with active ingredient IR3,535 (ethyl butylacetylaminopropionate, EBAAP) or Picaridin (hydroxyethyl isobutyl piperidine carboxylate, KBR 3,023, Bayrepel) were tested in a field study on 10 test persons over a period of 10 h for their efficacy at preventi...
Article
Full-text available
A novel mosquito trapping system, the BG-Sentinel trap, was evaluated as a monitoring tool for adult Aedes aegypti in field tests in the city of Belo Horizonte, Brazil. Human landing/biting collections, a gas-powered CO2 trap, and a Fay-Prince trap with only visual cues serving as references to evaluate the efficacy of the new trap. The BG-Sentinel...
Article
Full-text available
We introduce a novel, patent pending type of mosquito trap, the BG-Sentinel. The trap consists of an easy to transport, collapsible white bucket with white gauze covering its opening. In the middle of the gauze cover, there is a black tube through which a down flow is created by a fan that draws approaching mosquitoes into a catch bag. The air then...
Article
Full-text available
We have cloned and characterized a single copy C. reinhardtii gene containing an open reading frame of 333 nucleotides encoding a 12.7 kDa protein. The novel protein, DIP13, exhibits 60% identity with two mammalian proteins, human NA14 and an unnamed mouse protein. Homologous sequences are also present in several protozoan, trematode and fish genom...

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