- Author: Kathy Keatley Garvey
That's just one of the facts that UC Davis medical entomologist-geneticist Geoffrey Attardo will discuss when he presents a seminar on "The Mating Biology of Tsetse Flies--Insights into the Morphological, Biochemical, and Molecular Responses to Mating Stimuli in a Viviparous Disease Vector."
The seminar, hosted by the UC Davis Department of Entomology and Nematology, is set for 4:10 p.m., Monday, Oct. 9 in 122 Briggs Hall.
Attardo, an associate professor, UC Davis Department of Entomology and Nematology and chair of the Designated Emphasis in the Biology of Vector-Borne Diseases, is a global expert on vectorborne diseases, including his groundbreaking work on tsetse flies. He researches the invasive yellow mosquito, Aedes aegypti, which can carry such diseases as dengue, chikungunya, Zika and yellow fever.
His work involves predicting insecticide resistance and tracking movements of genetically independent populations of aegypti throughout the state.
"Research into the reproductive behavior of tsetse flies offers key insights into controlling diseases like African sleeping sickness," Attardo writes in his abstract. "Unique among insects, these flies give birth to live offspring. During mating, males transfer a mix of sperm and other vital substances to the females. This study employs state-of-the-art techniques, including 3D scanning and genetic analysis, to monitor changes in the female fly's reproductive system over a 72-hour period post-mating. Findings indicate that mating sets off a chain of intricate changes in the female, affecting everything from biochemistry to gene activity. These changes prepare her for pregnancy and childbirth. The study opens up new avenues for understanding tsetse fly biology and offers potential strategies for disease control."
The seminar also will be on Zoom. The link:
https://ucdavis.zoom.us/j/95882 849672
The Attardo lab monitors the dynamics of vector insects at the levels of physiology, population genetics and environmental interactions.
Attardo, who holds a doctorate in genetics from Michigan State University, where he researched the molecular biology of mosquito reproduction, joined the UC Davis Department of Entomology and Nematology in 2017 from the Yale School of Public Health's Department of Epidemiology of Microbial Diseases.
For his outstanding work, he received the 2022 Medical, Urban, and Veterinary Entomology Award from the Pacific Branch, Entomological Society of America, which encompasses 11 Western states, plus parts of Canada and Mexico, and U.S. territories.
For any technical issues regarding Zoom, contact seminar coordinator Brian Johnson at brnjohnson@ucdavis.edu.
Resources:
- Tsetse Fly Research (article featuring Geoffrey Attardo, Feb. 3, 2021, UC Davis Department of Entomology and Nematology
- A Tsetse Fly Births One Enormous Milk-Fed Baby, Deep Look, featurng the work of Geoffrey Attardo
- Author: Kathy Keatley Garvey
Attardo will discuss “The Mating Biology of Tsetse Flies--Insights into the Morphological, Biochemical, and Molecular Responses to Mating Stimuli in a Viviparous Disease Vector.”
"Research into the reproductive behavior of tsetse flies offers key insights into controlling diseases like African sleeping sickness," he writes in his abstract. "Unique among insects, these flies give birth to live offspring. During mating, males transfer a mix of sperm and other vital substances to the females. This study employs state-of-the-art techniques, including 3D scanning and genetic analysis, to monitor changes in the female fly's reproductive system over a 72-hour period post-mating. Findings indicate that mating sets off a chain of intricate changes in the female, affecting everything from biochemistry to gene activity. These changes prepare her for pregnancy and childbirth. The study opens up new avenues for understanding tsetse fly biology and offers potential strategies for disease control."
The seminar also will be on Zoom. The link:
https://ucdavis.zoom.us/j/95882 849672
The Attardo lab monitors the dynamics of vector insects at the levels of physiology, population genetics and environmental interactions.
Attardo is a global expert on vectorborne diseases, including his groundbreaking work on tsetse flies. He researches the invasive yellow mosquito, Aedes aegypti, which can carry such diseases as dengue, chikungunya, Zika and yellow fever. His work involves predicting insecticide resistance and tracking movements of genetically independent populations of aegypti throughout the state.
Attardo, who holds a doctorate in genetics from Michigan State University, where he researched the molecular biology of mosquito reproduction, joined the UC Davis Department of Entomology and Nematology in 2017 from the Yale School of Public Health's Department of Epidemiology of Microbial Diseases.
He received the 2022 Medical, Urban, and Veterinary Entomology Award from the Pacific Branch, Entomological Society of America, which encompasses 11 Western states, plus parts of Canada and Mexico, and U.S. territories.
For any technical issues regarding Zoom, contact seminar coordinator Brian Johnson at brnjohnson@ucdavis.edu.
Resources:
- Tsetse Fly Research (article featuring Geoffrey Attardo, Feb. 3, 2021, UC Davis Department of Entomology and Nematology
- A Tsetse Fly Births One Enormous Milk-Fed Baby, Deep Look, featurng the work of Geoffrey Attardo
- Author: Kathy Keatley Garvey
Enter John Hargrove, director emeritus of the South African Centre for Epidemiological Modelling and Analysis.
He will present a UC Davis Entomology and Nematology seminar on "Tsetse, Trypanosomiasis, and Climate Change: What Can We Learn from Field Data Collected in the Zambezi Valley of Zimbabwe?" at 4:10 p.m. Wednesday, May 3 in 122 Briggs Hall.
His seminar also will be on Zoom:
https://ucdavis.zoom.us/j/95882849672.
Host is UC Davis distinguished professor James R. Carey, UC Davis Department of Entomology and Nematology.
Hargrove, associated with the International Clinics on Infectious Disease Dynamics and Data Program (ICI3D), is a faculty member with the Clinic on Meaningful Modeling of Epidemiological Data (MMED) and the Clinic on Dynamical Approaches to Infectious Disease Data (DAIDD). He is a senior research fellow for the South African Centre for Epidemiological Modelling and Analysis, Stellenbosch University, Stellenbosch, South Africa, and a professor emeritus of mathematical sciences at Stellenbosch University.
Hargrove served as the inaugural director of the South African Centre for Epidemiological Modelling and Analysis (SACEMA). The precursors for MMED and DAIDD were launched in 2006 at the beginning of his directorship; he has been involved continuously as an instructor in the program since, according to his biography on ICI3D. Over the past nearly 50 years, Hargrove has combined fieldwork and mathematical epidemiology to understand the population dynamics and control of tsetse flies, the vectors of human African Trypanosomiasis.
He focuses his current research on the modelling population dynamics, with a particular focus on how increasing temperatures in Africa will affect tsetse distribution. This work involves improving estimation of mortality in adult and immature stages of the fly. Since 1999, he has also focused on the analysis and modelling of data in the world of HIV. Current interest are in improving the use of biomarkers for the accurate estimation of HIV incidence.
He holds a bachelor's degree in zoology (1968) from the University of Oxford; a master's degree in biomathematics (1981) from UCLA, and a doctorate in insect physiology (1973) from the University of London.
Department seminar coordinator is urban landscape entomologist Emily Meineke, assistant professor. For technical issues regarding Zoom connections, she may be reached at ekmeineke@ucdavis.edu. (See complete list of spring seminars.)
Resources:
SERVIR--From Space to Tsetse Fly
World Health Organization: Trypanosomiasis (Human African Sleeping Sickness)
- Author: Kathy Keatley Garvey
Attardo, who joined the UC Davis Department of Entomology and Nematology in 2017 from the Yale School of Public Health's Department of Epidemiology of Microbial Diseases, “excels not only as a researcher, but as a teacher, mentor, scientific illustrator, macro photographer, videographer and science communicator,” said UC Davis distinguished professor Bruce Hammock in his letter of nomination.
The Attardo lab monitors the dynamics of vector insects at the levels of physiology, population genetics and environmental interactions.
“I have known Geoff personally since July 2017 and I have always admired his scientific expertise, his unbridled enthusiasm, his many talents, and his scores of accomplishments,” wrote Hammock, who holds a joint appointment with the entomology department and the UC Davis Comprehensive Cancer Center. “He leads a highly successful research group that focuses on the molecular biology, biochemistry and physiology of medically important insects. His work, encompassing his research, teaching/mentorship, public service and outreach, brings international recognition to our department, college, university, the UC system and the entomological world.”
Eleven Western States. PBESA will recognize Attardo at an April 12 awards luncheon during its annual meeting, set April 10-13 in the Hyatt Regency Sonoma Wine Country. (link to https://www.entsoc.org/membership/branches/pacific/meeting.) PBESA is comprised of 11 Western states (Alaska, Arizona, California, Hawaii, Idaho, Montana, Nevada, Oregon, Utah, Washington, Wyoming), parts of Canada and Mexico, and seven U. S. territories. (Link to https://www.entsoc.org/membership/branches/pacific)
Attardo received a Ruth Kirshstein National Research Service Award from the National Institutes of Health (NIH) to study the molecular and biochemical physiology of tsetse fly lactation. His results “broadened our understanding of the physiology of live birth and lactation,” said Hammock, adding that his work “was the first to bring to bear state-of-the-art/high-throughput genetic, molecular and biochemical techniques.”
The co-principal investigator of a five-year NIH R01 grant, Attardo led a multinational collaboration resulting in the production, annotation and functional analysis of the first tsetse fly genome sequence.
Attardo is also a talented macro photographer and scientific illustrator, Hammock noted. Science editors featured his tsetse photo on their cover and used his illustrations throughout the article to show the tsetse's unique physiology. Attardo's work also drew high-profile coverage twice in the New York Times.
Attardo's current work focuses on defining the mating physiology of tsetse flies. He uses X-ray based MicroCT scanning to generate high resolution 3-dimensional images of tsetse reproductive tissues to understand the morphological specializations that enable live birth and lactation in tsetse flies. (See Attardo lab)
Attardo collaborated with the KQED (Public Broadcasting Service) “Deep Look” team to produce a YouTube video featuring macro footage and illustrations of tsetse live birth, blood feeding, and mating. The video, winner of a 2020 Northern California Emmy Award, has scored 6.2 million views, as of Jan. 4, 2022.
In a letter of support, molecular geneticist and physiologist Joanna Chiu, vice chair of the UC Davis Department of Entomology and Nematology, wrote in part:
“Dr. Attardo's internationally recognized research program on the physiology and genomics of insect vectors is creative, significant, and always of the highest quality and rigor. His research program seamlessly integrates fundamental mechanistic work and applied research to study physiology and behavior of insects that vector devastating human diseases. His teaching and mentoring program is innovative, inclusive, and he is fiercely supportive of his trainees and junior colleagues. Finally, he is passionate about outreach and extension because he understands the importance and value of transferring technologies from his lab to the field and extending information to benefit stakeholders locally and internationally.”
Very Effective Teaching Style. For the past two years, Chiu and Attardo have been co-teaching an undergraduate animal biology course on “Applications, Social and Ethical Issues in Animal Biology.” Chiu praised his ability to “engage the students” and his “very effective teaching style in helping students build critical thinking skills and confidence.”
Professor Immo Hansen of the Department of Biology, Institute of Applied Biosciences at New Mexico State University, echoed the praise. “Geoff is a prolific scholar with more than 55 publications and an h-index of 30 a value that one might expect for a full professor in the entomology field (my own h-index is 29). His early work on mosquito regulation of gene expression and nutritional signaling pathways as well as his later works on Tsetse genomics, nutrition, milk production, and symbiont interactions are highly original and represent significant increases in our knowledge in insect reproductive physiology.”
“He led the effort to sequence and annotate the genome of the Tsetse fly which resulted in a Science paper,” Hansen pointed out. “Geoff is a leading expert in the field of the molecular basis of insect reproduction (of tsetse flies) which is reflected by the large number of invited presentations he has given over the years. His truly innovative research in the field puts him at the forefront of researchers in his discipline.”
- Author: Kathy Keatley Garvey
Ah, Saturday, April 17. It's the 107th Annual UC Davis Picnic Day! What's a picnic without bugs?
This year's event, all virtual, is themed "Discovering Silver Linings," and you can do just that by watching the pre-recorded videos and by participating in the Zoom sessions. Check out the Picnic Day schedule of events which include entomological exhibits and talks from the UC Davis Department of Entomology and Nematology, Bohart Museum of Entomology and the UC Davis Graduate Student Association.
New additions to the line-up (featured on the Bohart Museum of Entomology website), involve what you could call "The good, the bad and the bugly." Blue orchard bees, tsetse flies and mosquitoes are spotlighted in UC Davis research-based videos created by KQED's Deep Look series and presented by PBS Digital Studios. Each runs about four minutes.
Here are the KQED productions:
- Watch this Bee Build Her Bee-Jeweled Nest, featuring blue orchard bees, the project of UC Davis doctoral student Clara Stuligross.
- A Tsetse Fly Births One Enormous Milk-Fed Baby, showcasing the work of medical entomologist Geoffrey Attardo, assistant professor, UC Davis Department of Entomology and Nematology.
- This Dangerous Mosquito Lays Her Armored Eggs--in Your House, involving the Aedes aegypti mosquitoes that the Attardo lab studies.
Clara Stuligross, Doctoral Student
They exposed the bees to the neonicotinoid insecticide imidacloprid, widely used in agriculture, and found that the combined threats—imidacloprid exposure and the loss of flowering plants—reduced the bee's reproduction by 57 percent, resulting in fewer female offspring.
Other scientists have conducted similar research on honey bees, but this is the first comparable research on wild bees in field or semi-field conditions. The blue orchard bee, nicknamed BOB, is a dark metallic mason bee, smaller than a honey bee. It is prized for pollinating almond, apple, plum, pear, and peach trees. California almond growers often set up bee boxes or "bee condos" for blue orchard bees to aid in honey bee pollination. In the wild, the bees nest in reeds or natural holes.
Update? "We are currently working on a follow-up study to investigate potential carryover effects of past insecticide exposure on the same bee population, as well as how repeated pesticide exposure over multiple years impacts bee population growth," Stuligross said today.
Geoffrey Attardo, Medical Entomologist-Geneticist
What many people do not know: "Female tsetse flies carry their young in an adapted uterus for the entirety of their immature development and provide their complete nutritional requirements via the synthesis and secretion of a milk like substance," Attardo says.
Attardo led landmark research published Sept. 2, 2019 in the journal Genome Biology that provides new insight into the genomics of the tsetse fly. The researchers compared and analyzed the genomes of six species of tsetse flies. Their research could lead to better insights into disease prevention and control.
The Deep Look episode on mosquitoes, "This Dangerous Mosquito Lays Her Armored Eggs-- in Your House," deals with the ability of Aedes aegypti eggs to survive out of water. Wrote the producers: "The Aedes aegypti mosquito, which can transmit dengue fever and Zika, makes a meal of us around our homes. And her eggs are hardy. They can dry out, but remain alive for months, waiting for a little water so they can hatch into squiggly larvae."