The Guiton Lab


Photo Credit: Alicja Cygan

Dr. Pascale S. Guiton
Principal Investigator

Dr. Guiton is passionate about the microbial world (from bacteria to viruses to fungi and protozoans and helminths). She is a molecular microbiologist by training. Her lab focuses on understanding the biology of the amazing parasite, Toxoplasma gondii. Her goal as a principal investigator is to teach her mentees the love of a work well done in a laboratory setting and instill in them the skills required for rigorous scientific experimentations.

Dr. Guiton is a scientist-educator first and foremost! As such, she seeks that each student in her class becomes proficient in speaking the language of biology, understands the basic scientific principles, and values the contribution of the scientific method to our understanding of the world today. She actively avoids teaching biological sciences as rote learning; rather she believes it is an opportunity to enrich her students' day-to-day lives and contribute in making them fully informed citizens.

She values cross-cultural understanding, inclusiveness, and compassion, which are core values that she strives to nurture in her classroom and foster in her mentees. She is approachable and highly dedicated to the success of all her students. Her mentoring style in the lab is catered to each student according to their needs and their career goals. She strongly believes that her role is to set an example for her mentees, one that she takes very seriously.

For more about Dr. Guiton's professional activities, please see her curriculum vitae below.

Photo Credit: Alicja Cygan


Emry Cohenour

Emry Cohenour is currently a Master’s student in Dr. Guiton’s lab. She earned her Bachelor’s of Science in Biochemistry from Saint Mary’s College of California. She has always had a passion for science and an inquisitive mind that eventually drew her towards research during her time as an undergraduate student.

Emry has continued her love and dedication for research at CSU East Bay by joining Dr. Guiton’s lab and their investigation of Toxoplasma gondii. Her topic specifically focuses on investigating the role of putative effector proteins in host/pathogen interactions.

When she isn’t in the lab, Emry enjoys going on runs, hanging out with friends and family, and exploring the Bay Area. She is a dedicated and energetic individual who enjoys working alongside her equally dedicated lab members.


Daniel Ho

Daniel Ho is currently a volunteer in Guiton lab. He has a BS in Microbiology. His current project focuses on the functional characterization of three developmentally regulated hypothetical proteins in Toxoplasma gondii. By working in the lab and trying new opportunities, Daniel believes he can become a better version of himself. He finds himself fortunate to be working alongside brilliant individuals, thus further improving his goals.


Kailah is currently pursing a Bachelor’s of Science degree with an emphasis in Cell and Molecular Biology. Her passion for moving science forward started when she was in her 7th grade biology class and had to dissect a worm. Kailah has strong aspirations of becoming a scientist for a biopharmaceutical company. Then, pursing a Master’s in Business Administration.In the Guiton lab, Kailah is analyzing the proteins that are in the Rhoptry organelle of Toxoplasma gondii and how they respond to the host’s immune system. When Kailah is out of the lab, she has a strong passion for cooking, going to the gym, and traveling!


Ariel MolinE

Ariel is currently a third year undergraduate student pursuing her Bachelor of Science degree in Biology with a concentration in Physiology. She has always been interested in the biological sciences and hopes to one day pair her passion for taking care of others and her love for science to one day become a doctor.

While working in Dr. Guiton's lab, Ariel hopes to gain more experience working with biological techniques used at the cellular level and to learn more about parasites, specifically Toxoplasma gondii. The specific aim of her project is to study developmentally regulated enzymes and see how they may contribute to the stage conversion in Toxoplasma between bradyzoites and tachyzoites.

When Ariel is not doing research, she enjoys spending time with friends and family, eating out, going on trips, and going to the gym. She is eager to learn more about Toxoplasma and to learn from her peers in the Guiton Lab.

Emily Quach

Emily Quach

Emily Quach is currently a Master’s student in Dr. Guiton’s lab. She earned her Bachelor’s of Science in Biotechnology with a concentration in microbiology and fermentation and a minor in technology management from UC Davis.

Emily is investigating how developmentally regulated metabolic enzymes contribute to stage conversion between bradyzoites and tachyzoites in Toxoplasma gondii.

Emily currently enjoys TAing Introduction to Clinical Microbiology (Biol 2025 at CSU East Bay) and being lab manager for Guiton lab.

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Paula Rodriguez

Guiton Lab Website

Paula Rodriguez-Cruz graduated from California State University East Bay with a Bachelor’s degree in Biological Sciences in May 2019. From a very young age she has had an interest in science-based subjects, especially those related to biology. She has always been intrigued by how living organisms function and how they are all linked. Paula is fascinated by what makes something ‘alive’, and the complexity and the very existence of the human body.

As a member of the Guiton Lab, she wants to develop the scientific skills that will provide her with a greater understanding of the environment and factors that affect living organisms. Specifically, her project focuses on characterizing developmentally regulated rhoptry proteins in Toxoplasma gondii which allow the bradyzoites form to manipulate the host immune response.

Paula is a passionate, hardworking, and dedicated student that is striving to achieving her maximum potential.


Proyasha Roy

Proyasha is a Master’s student at the Guiton Lab. She holds a Master’s degree in Biotechnology from Bangalore University, India.

Proyasha is interested in studying neglected diseases at the molecular level which led her to work on functional characterization of proteins inToxoplasma gondii which may be important for establishing chronic infection in hosts.

In her spare time, she loves to read and try out locally produced coffee!


Janak Sharma

Janak graduated from CSUEB in Spring of 2019. He is currently developing a series of plasmids for CRISPR/Cas9-mediated knockouts of hypothetical genes predicted to be involved in pathogenic processes of Toxoplasma gondii. Apart from research, he is interested in Advanced Biology, Physics and Chemistry, and loves to learn something from everyone. He is fun-loving, focused and passionate about school. Rising from India, he loves sports, especially martial arts, as well as music and dance.



Lab Security &
Cuddling Officer

Ziggy is Dr. Guiton's best friend! He is a hypoallergenic 6-year old Shih-Tzu-Poodle. He has been Dr. Guiton's companion since he was 4-months old. He is a very happy puppy! From time to time, Ziggy visits Dr. Guiton's workplace to provide everyone with petting time and to bring more joy in the lab. But BEWARE! As the lab security officer, he makes sure no one violates the established safety rules!


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Former Members

Kush graduated with a Bachelor of Science in Biological Science, with an emphasis in Microbiology in Spring of 2019. He will start to work as an EMT and apply to medical school.

Ankush Kalia

Apr 2018 - June 2019

Amanpreet finished Cal State East Bay’s Pre-Professional Health Academic Program. She hopes to apply to medical school soon.

Amanpreet Sidhu

Apr 2018 - June 2019

Binh graduated with a Bachelor of Science in Biological Science, with an emphasis in Microbiology in Spring of 2019. Binh will attend UCSF Medical School starting in August 2019.

Binh Cao

Oct 2017 - July 2019

Amanda Brawley

Oct 2018 - Feb 2019

Amanda is working for her Bachelor of Science in Biological Sciences.

Noresha is working towards her major in Biological Sciences with an emphasis on Biomedical Lab Sciences and a minor in Chemistry. She hopes to graduate and eventually apply to graduate schools. 

Noresha Brown

Jan 2018 - Aug 2018


Parm is working towards earning a Bachelor of Science in Biological Science, with an emphasis in Physiology, and a minor in Chemistry. She hopes to graduate in the Spring of 2019. 

Parm Dhillon

Nov 2017 - Aug 2018


Emma is pursing a Bachelor’s degree in Biology with a concentration in microbiology and minor in chemistry. She hopes to graduate in Spring of 2020 and one day become a clinical lab scientist.

Emma Sheldon

Oct 2017 - Aug 2018


Chris graduated with a Bachelor of Science in Biological Science, Microbiology/Biomedical Laboratory Sciences Option and minor in Chemistry, in Spring of 2018. He is currently finishing a phlebotomy program. He is a prospective Clinical Laboratory Science student. 

Christopher Javier

Oct 2017 - June 2018


Leslie Ann Ong

Sept 2017 - June 2018

Leslie graduated with a Bachelor of Science in Biological Science, Microbiology/Biomedical Laboratory Sciences Option and minor in Chemistry, in Spring of 2018. She is currently working at Pivot Bio. She hopes to apply to graduate school. 




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