MicroTalk podcast

49:21

Viroids are some of the most unusual biological infectious agents because they consist of only very small circular RNA molecules. They are too small to encode proteins, yet they are resilient and cause disease in a variety of agriculturally important plants, including cannabis, the sixth largest cash crop in the U.S. Dr. Zamir Punja is a Professor of Plant Biotechnology at Simon Frasier University, whose laboratory studies the cannabis viroid, which he refers to as the “COVID of cannabis”. Dr. Punja describes how viroids only infect plants, how a viroid stunts the growth and potency of cannabis plants, where viroids may have come from, why agricultural practices may enhance the spread of the cannabis viroid, how “beneficial” biological approaches may protect cannabis from infectious agents, and how the beautiful environment of Vancouver promotes good science. Dr. Vince Young joined microTalk on this episode, which was supported by Gordo Sheepsay’s My Dope Microscope. Participants: Karl Klose, Ph.D. (UTSA) Zamir Punja, Ph.D. (Simon Frasier University) Vincent Young, M.D., Ph.D. (University of Michigan) Janakiram Seshu, Ph.D. (UTSA)…

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Archaea for Me-a With Dr. Alexandre Bisson 59:40

23 weeks ago59:40

59:40

Archaea are one of the three domains of life on earth, but these organisms are much more mysterious and less understood than either Bacteria or Eukaryotes. Dr. Alex Bisson is an Assistant Professor in the Department of Biology at Brandeis University. His laboratory studies Archaea, primarily focusing on Haloarchaea. Dr. Bisson discusses how Archaea are able to shape-shift from one cell shape to another, how Haloarchaea are able to grow at extremely high salt concentrations, how Archaea cope with being “squishy”, how common polyploidy (multiple copies of chromosomes) is among Archaea, how Haloarchaea are able to desalinate soil to allow trees to grow, how Haloarchaea can lie dormant inside Himalayan Pink Salt, and how Boston is an intellectually stimulating place to do science. Dr. Salvador Almagro-Moreno joined microTalk on this episode, which was supported by Gordo Sheepsey’s My Brave Little Autoclave. Participants: Karl Klose, Ph.D. (UTSA). Alexandre Bisson, Ph.D. (Brandeis University) Janakiram Seshu, Ph.D. (UTSA). Salvador Almagro-Moreno (University of Central Florida)…

microTalk

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Eradication of the Guinea Worm with Adam Weiss 50:07

44 weeks ago50:07

50:07

Guinea worm infections have been plaguing mankind throughout recorded history. The Carter Center took the lead in the guinea worm eradication effort in the 1980’s, when there were over 3 million cases per year. Through concentrated effort, this disease is on the brink of extinction, with only 14 human cases in 2023! Adam Weiss, MPH, is the director of the Guinea Worm Eradication Program at the Carter Center. microTalk caught up with Adam at the ASM Microbe conference in Atlanta in a live session to discuss the imminent extinction of guinea worm disease. Weiss talks about how seeing the disease first-hand led to President Carter’s and Weiss’ passion for eradication, how behavior modification was key to guinea worm eradication, how a reservoir in dogs affects eradication efforts, and how being in the Peace Corps influenced his career path. Watch this episode: https://youtu.be/yt7cDHZhThI Participants: Karl Klose, Ph.D. (UTSA). Adam Weiss, M.P.H. (Carter Center) Janakiram Seshu, Ph.D. (UTSA). Jesus Romo, Ph.D. (UTSA).…

microTalk

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CHARMing the Superbugs with Dr. Victor Nizet 53:34

1 year ago53:34

53:34

Antibiotic resistant bacteria are threatening modern society by making antibiotics obsolete. Dr. Nizet is a Professor and Vice Chair in the Department of Pediatrics at UCSD, as well as the faculty lead for the UCSD Collaborative to Halt Antibiotic-Resistant Microbes (CHARM). His laboratory studies how the human immune system interacts with microbial pathogens, with particular focus on antibiotic resistant bacteria and how to treat them. Dr. Nizet discusses how his training as a physician helps drive the research in his laboratory, how repurposing therapeutic drugs could help fight antimicrobial resistance, how taking advantage of host immune responses can enhance the treatment of infectious diseases, how the success of modern medicine is training some bacteria to become pathogenic, how nanobots made from algae can be used to treat difficult infections, and how the environment at UC San Diego contributed to the success of his lab. This episode was supported by the do-it-yourself mail-order Gram stain kit.* Participants: Karl Klose, Ph.D. (UTSA) Victor Nizet, M.D. (UC San Diego) Venus Stanton (UTSA) Jesus Romo, Ph.D. (UTSA) * "Ads" heard on microTalk are for parody purposes only, there are no actual products for sale .…

microTalk

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300 Days in Space with Astronaut Dr. Kate Rubins 56:41

1 year ago56:41

56:41

Houston, we definitely do NOT have a problem…with interviewing Dr. Kate Rubins, NASA astronaut. Dr. Rubins is a virologist who has spent over 300 days in space, performing experiments aboard the International Space Station, where she was the first person to sequence DNA in space. We caught up with Dr. Rubins at the Neutral Buoyancy Lab in Houston, where she discusses what it felt like the first time she saw the earth from space, some of the difficulties in performing research without gravity, how to study the microbiome of the ISS, how the international inhabitants of the ISS communicate with each other, and the spur-of-the-moment event that led to her becoming an astronaut. This episode was supported by Cestodium, a new weight-loss program.* Participants: Karl Klose, Ph.D. (UTSA) Kate Rubins, Ph.D. (NASA) Janakiram Seshu, Ph.D. (UTSA) Jesus Romo, Ph.D. (UTSA) *The recorded ads heard on microTalk are for parody purposes only, there are no actual products for sale .…

microTalk

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Gut on a Chip: Human Gastrointestinal Organoids with Dr. Hyun Jung Kim 43:26

1 year ago43:26

43:26

Dr. Hyun Jung Kim, an Assistant Professor at Cleveland Clinic specializes in coaxing human cultured cells to differentiate and form tissues resembling the gastrointestinal tract, in order to study microbe-GI interactions. Dr. Kim discusses his surprising discovery of how common immortalized cultured cells can differentiate and form something that resembles a gut-on-a-chip, how these guts-on-a-chip can be used to study diseases like inflammatory bowel disease and colorectal cancer, how the addition of a microbiome to the gut-on-a-chip allows the bacteria to retain diversity unlike in a test tube, how the gut-on-a-chip could be valuable for personalized medicine, and the things he misses about Texas since moving from there. This episode was supported by Eezy Breezy Poke, an elegant at-home vaccine service. Participants: Karl Klose, Ph.D. (UTSA) Hyun Jung Kim, Ph.D. (Cleveland Clinic) Janakiram Seshu, Ph.D. (UTSA) Jesus Romo, Ph.D. (UTSA)…

microTalk

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Plague, Anthrax, and ASM, Oh My! With ASM president Virginia Miller and president-elect Theresa Koehler 45:20

2 years ago45:20

45:20

Plague and anthrax are feared diseases due to high mortality rates following pulmonary exposure, and both are considered potential bioweapons. Dr. Virginia Miller, professor at the University of North Carolina at Chapel Hill and ASM President, studies plague, as well as other Gram negative bacteria. Dr. Theresa Koehler, emeritus professor at UTHealth Houston and ASM president-elect, is an expert in anthrax. microTalk caught up with Dr. Miller and Dr. Koehler at ASM Microbe 2023 in Houston to discuss these biothreat agents. Dr. Miller discusses why she studies plague, the differences between bubonic and pneumonic plague, why Klebsiella pneumoniae poses a growing health threat, and what it was like being John Mekalanos’ first Ph.D. student. Dr. Koehler discusses why anthrax is considered a potential bioweapon, why significant scientific progress was made following the anthrax attacks of 2001, why gardeners shouldn’t worry about catching anthrax, and her first failed experiment. Both discuss their vision for ASM and the role it plays in microbiological research and society. Participants: Karl Klose, Ph.D. (UTSA) Virginia Miller, Ph.D. (UNC Chapel Hill) Theresa Koehler, Ph.D. (UT Health Houston) Janakiram Seshu, Ph.D. (UTSA) Jesus Romo, Ph.D. (UTSA)…

microTalk

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Microbes to the Rescue! Bioremediation with Dr. John Coates 51:21

2 years ago51:21

51:21

Dr. John Coates, a professor at the University of California Berkeley specializes in environmental microbiology and how microbes can be utilized to resolve problems in industry. microTalk caught up with Dr. Coates at the ASMicrobe conference in Houston and discussed his research in applied and environmental microbiology. Dr. Coates discusses an unexpected discovery of how microbes drive the iodine cycle on earth, how sequencing microbes in the oceans has been beneficial for identifying novel biochemical activities, how climate change has stimulated his research into the “bioeconomy”, why he’s optimistic that science can mitigate the effects of climate change, and how Berkeley is a remarkable place to do science. This episode was supported by miniScope, the portable keychain microscope. Participants: Karl Klose, Ph.D. (UTSA) John Coates, Ph.D. (UCSD) Janakiram Seshu, Ph.D. (UTSA) Jesus Romo, Ph.D. (UTSA)…

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The Evolution Revolution with Dr. Vaughn Cooper 42:15

2 years ago42:15

42:15

The study of evolution has experienced a tremendous revolution with the advances in current sequencing technologies enabling e.g. rapid whole genome sequencing. Dr. Vaughn Cooper, a professor at the University of Pittsburgh who studies evolution in microbes, has taken advantage of these technologies to delve into how microorganisms adapt and evolve in different environments. microTalk caught up with Dr. Cooper at the ASM Microbe conference in Houston and discussed microbial evolution with him. Dr. Cooper discusses the power of next generation sequencing for the study of evolution, how mutation rates affect evolution, how providing hands-on evolution experiments to high school students can stimulate the next generation of scientists, how scientists need to work to combat public distrust of science, how antibiotic resistance evolves in the presence of immunodeficiency, and how his initial experience with baculoviruses hooked him into a lifelong study of evolution. This episode was supported by Darbie’s pinworm detection kit, to combat nematodes in your bikini bottom. Participants: Karl Klose, Ph.D. (UTSA) Vaughn Cooper, Ph.D. (University of Pittsburgh) Janakiram Seshu, Ph.D. (UTSA) Jesus Romo, Ph.D. (UTSA)…

microTalk

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Adversary o’ Malaria with Dr. Debopam Chakrabarti 41:35

2 years ago41:35

41:35

Malaria continues to have a significant impact on humans. The Plasmodium parasites are transmitted through mosquito bites, and the disease has a tremendous impact on global health. Dr. Debopam Chakrabarti, a professor at the University of Central Florida who specializes in malaria. Dr. Chakrabarti discusses the history of the search for antimalarials, the problem of parasite drug resistance, how undergraduates can help to discover the next antimalarials, whether eradication of mosquitoes will eliminate malaria, and his challenging passion in growing roses in Florida. This episode was supported by ArchaeaMingle.com, for single-celled organisms looking for a steamy time. Participants: Karl Klose, Ph.D. (UTSA) Debopam Chakrabarti, Ph.D. (University of Central Florida) Janakiram Seshu, Ph.D. (UTSA) Jim McLellan (UTSA)…

microTalk

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“Ex” Marks the Spot: Exosomes with Ramin Hakami 40:55

2 years ago40:55

40:55

Exosomes are small vesicles that that facilitate communication between eukaryotic cells. They resemble mini-cells, and act like carrier pigeons, trafficking various “payloads” among cells. Dr. Ramin Hakami is a Professor of Microbiology at George Mason University. Dr. Hakami studies how infectious diseases are modulated by exosome signaling. Dr. Hakami talks about how exosomes can deliver messages to cells, how Rift Valley Fever and Plague affect exosome signaling within infected hosts, how exosomes provide specificity and a “reply all” function to signaling, how being in a Nobel lab affected his approach to science, and his alternate career as a salsa dancer. This episode was supported by IV Rehydration Therapy, the treatment that prevents explosive diarrhea from inhibiting your social life. Participants: Karl Klose, Ph.D. (UTSA) Ramin Hakami, Ph.D. (George Mason University) Janakiram Seshu, Ph.D. (UTSA) Mylea Echazarreta (UTSA)…

microTalk

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Coxiella burnettii with Stacey Gilk 35:45

2 years ago35:45

35:45

Coxiella burnettii causes Q Fever, a zoonotic disease that is rarely acquired by humans. But Q Fever has a history of being developed as a bioweapon because of its ability to be spread by aerosols and cause debilitating but not lethal disease. Dr. Stacey Gilk is an Associate Professor at the University of Nebraska Medical Center who studies Coxiella . Dr. Gilk talks about what makes Q Fever a potential biothreat agent, how figuring out how to grow Coxiella outside of cells revolutionized the study of this bacterium that was thought to only grow intracellularly, how a large outbreak in the Netherlands led to the deaths of thousands of dairy goats, how cholesterol affects the ability of Coxiella to grow, how falling in love with Toxoplasma led her to pursue infectious disease research, and what a wonderful place Nebraska is to do science. This episode was supported by Gordo Sheepsay’s My Dope Microscope, the kitchen appliance that may literally save your life. Participants: Karl Klose, Ph.D. (UTSA) Stacey Gilk, Ph.D. (Univ. Nebraska Medical Center) Janakiram Seshu, Ph.D. (UTSA) Jesus Romo, Ph.D. (UTSA)…

microTalk

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Chytridiomycosis: Amphibians and Fungal Disease with Anat Belasen 42:10

2 years ago42:10

42:10

There have been dramatic declines in amphibian populations around the world, and one of the culprits is the disease Chytridiomycosis. This is a skin disease of amphibians caused by two different species of Batrachochytrium fungi, and it has decimated frog and salamander populations and even driven some to extinction. Dr. Anat Belasen is a post-doctoral scientist at the University of Texas Austin who studies Chytridiomycosis. Dr. Belasen discusses how some amphibians are highly susceptible to this disease whereas others are resistant, why amphibian skin is so important for their well-being, how frogs can be considered a biological indicator of the health of an ecosystem, how farmed bullfrogs may be spreading the disease around the world, how genetic susceptibility screening and microbiomes may be used to try and stop the population decline, and how she’s been a frog lover for her entire life. This episode was supported by Gordo Sheepsay’s My Brave Little Autoclave, the kitchen appliance that may literally save your life. Participants: Karl Klose, Ph.D. (UTSA) Anat Belasen, Ph.D. (U.T. Austin) Mylea Echazarreta (UTSA)…

microTalk

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The Largest Bacterium, Thiomargarita Magnifica, with Jean-Marie Volland 58:58

3 years ago58:58

58:58

Microbiology textbooks teach that bacteria are so small that they cannot be seen without a microscope, and that they do not contain organelles or a nucleus. Then along comes Thiomargarita magnifica and smashes this dogma. T. magnifica is a giant bacterium that reaches 2 cm in length and can be easily seen with the naked eye. These bacteria, about the size of an eyelash, grow in mangrove swamps. Dr. Jean-Marie Volland is a scientist at the Laboratory for Research in Complex Systems in the Lawrence Berkeley National Laboratories. Dr. Volland has characterized the surprising properties of T. magnifica , and he discusses why T. magnifica is found in mangrove swamps, how it overcomes the limitations of nutrient diffusion that keeps most bacteria small, how sulfur oxidation expands the ability of organisms to live in extreme environments, how symbiotic relationships between bacteria and other cells are ubiquitous despite going against survival of the fittest, how studying in Guadeloupe and Austria influenced his interest in symbiosis, and how looking for things in atypical environments leads to novel discoveries. The microCase for listeners to solve is about Gordo Sheepsay, the temperamental chef of a cooking competition show who eats something more life-threatening than haute cuisine. Participants: Karl Klose, Ph.D. (UTSA) Jean-Marie Volland, Ph.D. (Lawrence Berkeley National Laboratories) Mylea Echazarreta (UTSA)…

microTalk

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Vibrio vulnificus (and other Vibrios) with Salvador Almagro-Moreno 1:02:36

3 years ago1:02:36