Creepy, Dreadful, Wonderful Parasites

Every week, Mayo Clinic microbiologist Bobbi Pritt, M.D., posts a new case, along with the answer to the previous case. Dr. Pritt started her blog after she completed her fellowship at Mayo Clinic in clinical microbiology. She attended the London School of Hygiene and Tropical Medicine to study parasitology for one year. During that year in England, Dr. Pritt saw some amazing cases, which she shared with her colleagues back at Mayo through her blog. Through word of mouth, people from all walks of life around the globe have become interested in Dr. Pritt’s “case of the week,” and her readership continues to grow. Note from Dr. Pritt: All opinions expressed here are mine and not my employer's. Information provided here is for medical education only. It is not intended as, and does not substitute for, medical advice. I do not accept medical consults from patients.

Every week, Mayo Clinic microbiologist Bobbi Pritt, M.D., posts a new Parasite Wonders case.This week's case was generously donated by Florida Fan and is very appropriate for this time of the year! The following objects were seen on a stool specimen that had been stained by Wright-Giemsa to look for fecal leukocytes (total magnification 1000x). Preliminary identification? What additional stain would you like to perform to confirm your diagnosis?

By Bobbi Pritt, M.D. • July 10, 2019

Every week, Mayo Clinic microbiologist Bobbi Pritt, M.D., posts a new Parasite Wonders case. This week's case is donated by Idzi Potters and the Institute of Tropical Medicine, Antwerp. The following objects were seen in a concentrated wet prep of a stool specimen from an international adoptee from Ethiopia. They measure approximately 60 micrometers in greatest dimension. What's the identification?

By Bobbi Pritt, M.D. • July 5, 2019

Every week, Mayo Clinic microbiologist Bobbi Pritt, M.D., posts a new Parasite Wonders case. This week's rather creepy and very cool case was donated by Dr. Matt Bolek and Christina Anaya. See a video of this parasite here. While the host shown here is not a human, this parasite emerging from the cricket is occasionally submitted to human clinical parasitology laboratories. What is its significance for human health?

By Bobbi Pritt, M.D. • June 19, 2019

Every week, Mayo Clinic microbiologist Bobbi Pritt, M.D., posts a new Parasite Wonders case. This week's case, generously donated by Dr. Tara Ness, with filming credit to the Lab Hlathi Team in eSwatini. See a video of this parasite here. The following arthropod was found in the urine specimen of a man with HIV and a history of dysuria. What's the identification?

By Bobbi Pritt, M.D. • June 12, 2019

Every week, Mayo Clinic microbiologist Bobbi Pritt, M.D., posts a new Parasite Wonders case. This week's case, from Idzi Potters and the Institute of Tropical Medicine in Antwerp, features 1-cm long structure was extracted from a Belgian patient returning from Ghana. What's the identification?

By Bobbi Pritt, M.D. • June 5, 2019

Every week, Mayo Clinic microbiologist Bobbi Pritt, M.D., posts a new Parasite Wonders case. This week's case features two different types of objects seen in a trichrome-stained stool specimen that was screened by a digital slide image and machine learning platform. How did it do? Did it find real parasites?

By Bobbi Pritt, M.D. • May 29, 2019

Every week, Mayo Clinic microbiologist Bobbi Pritt, M.D., posts a new Parasite Wonders case. This week's case features the following worm noted in the toilet of a patient with an extensive international travel history. See a video of this parasite here. What's the identification?

By MCL Education • May 22, 2019

Every week, Mayo Clinic microbiologist Bobbi Pritt, M.D., posts a new Parasite Wonders case. This week's case features an interesting finding in a concentrated stool specimen. The individual structures are approximately 25 micrometers in length, while the longer tubular structure is 330 micrometers long. What's the identification?

By Bobbi Pritt, M.D. • May 15, 2019

Every week, Mayo Clinic microbiologist Bobbi Pritt, M.D., posts a new Parasite Wonders case. This week's case features multiple small (3-6 µm), round structures identified after a stool specimen was submitted for parasite examination. The patient is a 15-year-old boy returning from swimming camp, who presents with several-day history of profuse watery diarrhea. What's the identification?

By Bobbi Pritt, M.D. • May 8, 2019

Every week, Mayo Clinic microbiologist Bobbi Pritt, M.D., posts a new Parasite Wonders case. The following structures were seen on a non-nutrient agar culture that had been inoculated with corneal scrapings. What's the identification?

By Bobbi Pritt, M.D. • May 1, 2019

Every week, Mayo Clinic microbiologist Bobbi Pritt, M.D., posts a new Parasite Wonders case. This week's case features objects found in a middle-aged male patient's stool. Individually, they measured approximately 1 cm in length. What's the identification?

By Bobbi Pritt, M.D. • April 24, 2019

Every week, Mayo Clinic microbiologist Bobbi Pritt, M.D., posts a new Parasite Wonders case. This week's case features objects seen in a human stool specimen and measure approximately 80 micrometers in length. What's the identification?

By Bobbi Pritt, M.D. • April 17, 2019

Every week, Mayo Clinic microbiologist Bobbi Pritt, M.D., posts a new Parasite Wonders case. This week's case features a finding in a concentrated stool specimen. The scale bars each represent 2.5 micrometers. What's the identification?

By Bobbi Pritt, M.D. • April 10, 2019