This Week in Parasitism

This Week in Parasitism

TWiP is a monthly netcast about eukaryotic parasites. Vincent Racaniello and Dickson Despommier, science Professors from Columbia University, deconstruct parasites, how they cause illness, and how you can prevent infections.

Episodes

August 27, 2026 72 mins

TWiP solves the case of the adult female with a 2 year old child who develops anal irritation, but the child and the husband are fine.

Hosts: Vincent RacanielloDaniel Griffin, and Christina Naula

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TWiP reviews our current understanding of the biology of Cyclospora, the parasite currently causing a large multistate outbreak in the US traced to contaminated lettuce, and why it is so difficult to control.

Hosts: Vincent Racaniello and Christina Naula

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July 27, 2026 50 mins

TWiP solves the case of the 39-year-old man originally from Guatemala, who moved to one of the NYC boroughs in 2023 and presented with headaches for nearly 1 year.

Hosts: Vincent RacanielloDaniel Griffin, and Christina Naula

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TWiP reviews the projected impact of climate change on the burden of Cryptosporidium in Mali, Kenya, and The Gambia.

Hosts: Vincent Racaniello and Christina Naula

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June 24, 2026 53 mins

TWiP solves the case of the nonbinary patient in his 30s with a history HIV/AIDS presenting with 3 weeks of subjective fevers, chills, generalized weakness and voluminous ostomy output.

Hosts: Vincent RacanielloDaniel Griffin, and Christina Naula

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    June 22, 2026 58 mins

    TWiP reviews gene expression in wood ants infected with the larval lancet fluke, which causes them to leave their nest and attach to a flower until they are eaten by a grazing mammal.

    Hosts: Vincent RacanielloDaniel Griffin, and Christina Naula

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    May 28, 2026 57 mins

    TWiP solves the case of the 3 yo child, who recently immigrated to the US from Central America, in the ER with acute right lower quadrant abdominal pain and a rather active serpiginous wormlike 'thing' wiggling away in the child's appendix.

    Hosts: Vincent RacanielloDaniel Griffin, and Christina Naula

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    May 1, 2026 50 mins

    TWiP reviews a phase 2 clinical trial of a recombinant vaccine against N. americanus glutathione S-transferase-1, an enzyme that performs a crucial enzymatic step in
    hookworm blood feeding.

    Hosts: Vincent RacanielloDaniel Griffin, and Christina Naula

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    TWiP solves the case of the male in his 20s from Hokkaido, Japan, who developed fatigue and rash, followed by fever and myalgia 6 days later, after eating a raw bear eyeball.

    Hosts: Vincent RacanielloDaniel Griffin, and Christina Naula

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    April 21, 2026 63 mins

    TWiP 277: Rif-ing on river blindness

    April 21, 2026

    TWiP reviews the global, regional, and national burden of Chagas disease, and comparison of doxycycline and rifampicin for the treatment of onchocerciasis.

    Hosts: Vincent RacanielloDaniel Griffin, and Christina Naula

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    March 23, 2026 76 mins

    TWiP solves the case of the man in his 60s experiencing weight loss, fatigue, and loss of appetite.

    Hosts: Vincent RacanielloDaniel Griffin, and Christina Naula

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    March 12, 2026 42 mins

    TWiP reviews the effectiveness of long-lasting spatial repellent emanators against malaria in humanitarian crisis settings in northern Nigeria, and Dengue suppression by male Wolbachia-infected mosquitoes.

    Hosts: Vincent RacanielloDaniel Griffin, and Christina Naula

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    February 17, 2026 47 mins

    TWiP solves the case of the 40 year old male who travels to India and develops intestinal bloating and diarrhea.

    Hosts: Vincent RacanielloDaniel Griffin, and Christina Naula

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    February 6, 2026 65 mins

    TWiP reviews intestinal parasites in dogs and their association with clinical manifestations of canine visceral leishmaniasis.

    Hosts: Vincent RacanielloDaniel Griffin, and Christina Naula

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    January 15, 2026 57 mins

    TWiP solves the case about the man with positive Strongyloides serology who is waiting for a kidney transplant.

    Hosts: Vincent RacanielloDaniel Griffin, and Christina Naula

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    December 23, 2025 49 mins

    TWiP explores female genital schistosomiasis and associated genital infections in Southern Malawi, a neglected tropical disease.

    Hosts: Vincent RacanielloDaniel Griffin, and Christina Naula

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    November 28, 2025 56 mins

    TWiP solves the case about the man with abnormal brain MRI, and presents a new case for your solving about a man with some electrolyte issues related to his end-stage renal disease.

    Hosts: Vincent RacanielloDaniel Griffin, and Christina Naula

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    November 21, 2025 63 mins

    TWiP travels to Toronto, CA for the American Society for Tropical Medicine and Hygiene conference where they meet up with Martin Grobusch to discuss his career and his work.

    Hosts: Vincent RacanielloDaniel Griffin, and Christina Naula

    Guest: Martin Grobusch

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    November 9, 2025 60 mins

    TWiP discusses a 41-year long human infection with Schistosoma mansoni, and CRISPR screens that reveal genes essential for Cryptosporidium survival in the host intestine.

    Hosts: Vincent RacanielloDaniel Griffin, and Christina Naula

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      October 21, 2025 54 mins

      TWiP solves the case about the female who traveled to Brazil and upon returning home felt movements under her scalp on the back of her head, and present another case for your solving, a man with abnormal brain MRI.

      Hosts: Vincent RacanielloDaniel Griffin, and Christina Naula

      Guest: Eyal Leshem

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