Every week, Mayo Clinic microbiologist Bobbi Pritt, M.D., posts a new Parasite Wonders case. This week’s case was donated by Dr. Neil Harris and Dr. Stacy Beal. The patient is an infant with a history of tracheobronchomalacia and “eosinophilia” on prior bronchoscopy. A routine complete blood count was negative without evidence of peripheral eosinophilia. The following structures were seen on a Giemsa-stained bronchoalveolar lavage specimen using the 100x objective. They have a diameter of 1-3 micrometers. What’s the identification?

Every week, Mayo Clinic microbiologist Bobbi Pritt, M.D., posts a new Parasite Wonders case. This week, Dr. Pritt posted her 555th case. In honor of reaching this number, she is asking readers to try to think of things to do with parasites that involve the number five. If you have anything to share, please post it as a comment on her blog.

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. The following are seen on Giemsa-stained thick and thin blood films. No history is immediately available. What’s the Diagnosis? Any additional information you would like?

Every week, Mayo Clinic microbiologist Bobbi Pritt, M.D., posts a new Parasite Wonders case. This week’s (interesting but somewhat disturbing) case was generously donated by Dr. José A. T. Poloni. The following was submitted from a fresh (unfixed) stool specimen. What’s the most likely identification?

Every week, Mayo Clinic microbiologist Bobbi Pritt, M.D., posts a new Parasite Wonders case. This week’s case is from Blaine Mathison. The following were seen on a trichrome-stained stool specimen. They averaged 5 to 7 micrometers in greatest dimension. A Giardia antigen test was positive. What’s the identification?

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?

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?

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?

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?

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?

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?

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?

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?