Kevin Doxzen is a science communications specialist at the Innovative Genomics Institute in Berkeley, CA, associated with Dr. Jennifer Doudna. The Institute specializes in gene editing using CRISPR/Cas.

The CRISPR/Cas system evolved as a bacterial defense against virus attack, but it has been exploited primarily to manipulate the genomes of eukaryotes. CRISPR/Cas has already revolutionized gene editing, and has led to the creation of a large number of modified animals, which has led to ethical questions about human genome manipulation.

Dr. Doxzen talks about how CRISPR/Cas evolved, the various applications that is has been used for, some of the controversies associated with its use, and its further potential to improve human health.

The microCase for listeners to solve is about Nigel Tufnel, an aging rocker with a wild lifestyle who comes down with a life-threatening disease after going fishing in the Gulf of Mexico.

Participants:

  • Karl Klose, Ph.D. (UTSA)
  • Kevin Doxzen, Ph.D. (Innovative Genomics Institute/U.C. Berkeley)
  • Janakiram Seshu, Ph.D. (UTSA)
  • Jesus Romo (UTSA)

Puerto Rico suffered a direct hit from the devastating hurricane Maria in September 2017, which destroyed the power grid and caused mass destruction across the island. Recovery has been slow, and Puerto Rican scientists have suffered from the after-effects in their research activities.

Dr. Greetchen Diaz is the Director of Educational Programs at Ciencia Puerto Rico, Dr. Bejamin Bolaños is a professor of mycology at the University of Puerto Rico School of Medicine, Marcos Ramos Benitez is a Ph.D. student at the University of Puerto Rico, and Dr. Zomary Flores is a Professor at the University of Puerto Rico. microTalk recorded this discussion about the situation for Puerto Rican microbiologists post-Maria at the Puerto Rican Society for Microbiology meeting at Universidad del Este in Carolina, Puerto Rico.

These Puerto Rican scientists describe what happened to their laboratories after the hurricane, what it was like to be a graduate student mid-thesis in the middle of the devastation, the current status of science in Puerto Rico, some of the infections that increased in the aftermath, and how supportive the U.S. scientific community has been.

The microCase for listeners to solve is about Jim Beam, a middle-aged marketing executive who gets sick after trying to regain his youth during a backpacking trip.

Participants:

  • Karl Klose, Ph.D. (UTSA)Greetchen Diaz Muñoz, Ph.D. (Ciencia Puerto Rico)
  • Benjamin Bolaños, Ph.D., (University of Puerto Rico School of Medicine)
  • Marcos Ramos Benitez (University of Puerto Rico, Medical Sciences)
  • Zomary Flores-Cruz, Ph.D. (University of Puerto Rico-Rio Piedras)

Julie Maresca is an associate professor in Civil and Environmental Engineering at the University of Delaware. Concrete is the most commonly used building material in the world, and is a very unique dry, high pH environment with special chemical properties. Amazingly, there are microbial communities that live within concrete.

Dr. Maresca talks about these trapped communities of microbes, whether they are dormant or growing, whether microbes could be added to make concrete stronger, how some bacteria can thrive in conditions where there are no apparent nutrients, and how the thrill of discovery drove her to be a scientist.

The MicroCase for listeners to solve is about Sarah Lee, the diabetic baker at Cake Baby who becomes sick after walking through her neighborhood to work.

Participants:

  • Karl Klose, Ph.D. (UTSA)
  • Julie Maresca, Ph.D. (University of Delaware)
  • Jesus Romo (UTSA)

Carol Kumamoto is a professor of microbiology at Tufts University. She studies Candida albicans, the most common fungal pathogen of humans.

C. albicans is a normal commensal of the human body, and it typically does not cause any harm to people, but rather lives happily among the other microbes e.g. within the intestine. However when the host becomes immunocompromised, C. albicans will invade tissues and cause a life-threatening infection.

Dr. Kumamoto talks about how C. albicans’ interactions with the other microbes within the body influences its virulence, the difficulty of developing antifungals that don’t harm people, how antivirulence strategies may identify new antifungals, and how she can’t imagine doing anything else besides being a scientist.

The MicroCase for listeners to solve is about Don Risiko, the bat-loving host of the cable TV show “Demons Within Us” who becomes sick after spelunking.

Participants:

  • Karl Klose, Ph.D. (UTSA)
  • Carol Kumamoto, Ph.D. (Tufts University)
  • Jose Lopez-Ribot, Ph.D., Pharm.D. (UTSA)
  • Jesus Romo (UTSA)

Cherise Rohr-Allegrini is the program director at the Immunization Partnership, whose goal is to improve vaccination rates in San Antonio and across Texas.

Every year millions of people suffer and die from vaccine-preventable diseases. The Immunization Partnership strives to increase vaccination rates through education and advocacy.

Dr. Rohr-Allegrini talks about how the success of vaccines has ironically contributed to the rise of the anti-vax movement, how the way scientists talk about vaccines is important to increase vaccination rates, the autism-vaccine controversy, the tantalizing approach of polio eradication, and her background in studying vector-borne diseases in developing countries.

The MicroCase for listeners to solve is about Sandy Sanchez, the pregnant bird-watching game warden who becomes sick with a mysterious illness that may threaten her baby.

Participants:

  • Karl Klose, Ph.D. (UTSA)
  • Cherise Rohr-Allegrini, M.P.H., Ph.D. (The Immunization Partnership)
  • Jesus Romo (UTSA)

Ned Ruby is a professor at the University of Hawaii at Manoa who pioneered the study of a fascinating bacterial-squid symbiosis. The bacterium Vibrio fischeri colonizes the light organ of the squid Euprymna scolopes and produces light, which helps the squid avoid predation and provides the bacteria a protected place to thrive.

Over the course of several decades, Dr. Ruby, along with Dr. Margaret McFall-Ngai, have illuminated the complex and elegant interactions between the bacteria and the squid.

Dr. Ruby talks about what a symbiosis is, how V. fischeri can count how many friends are around them through quorum sensing, how they can specifically colonize the squid, and his missed opportunity to have been a professional trumpet player.

The MicroCase for listeners to solve is about John Shriek, a retired Marine who becomes ill after a camping trip with his son’s Pathfinder Troop.

Participants:

  • Karl Klose, Ph.D. (UTSA)
  • Ned Ruby, Ph.D. (University of Hawaii at Manoa)
  • Jesus Romo (UTSA)