Parasitology on Leukoformula

Parasitology Challenge: Find the Parasite in the Field of View

Wed, 07 Oct 2026 10:47:54 +0300

🔬 Can you find the parasite in 60 seconds? We are currently actively developing a new online parasitology simulator.

The mechanics are simple: you are presented with a microscope’s field of view containing many different objects. Among them, a parasite object is hidden, which you need to find in just 60 seconds.

Diagnostic Features of Opisthorchis and Clonorchis Eggs

Tue, 22 Sep 2026 19:05:26 +0300

Distinctive features of eggs: Opisthorchis/Clonorchis

Morphology of Enterobius vermicularis Eggs in Enterobiasis

Thu, 28 May 2026 18:00:00 +0300

E. vermicularis egg in an iodine-stained wet mount from a formalin concentrate. Image courtesy of the Kansas State Public Health Laboratory.

Source: CDC - DPDx - Enterobiasis. 💎 Find more useful parasitology materials in our LAB-TESTS library. A link with access to the library is automatically sent to you via private message after paying for a VK Donut Labformula subscription.

Trichuris trichiura: Morphology of Whipworm and Eggs

Tue, 12 May 2026 15:00:00 +0300

Adult Trichuris trichiura and egg. In the male, the posterior part of the body is curved in a dorsoventral direction (thicker). Habitat: large intestine. Route of infection: oral, by swallowing the egg. Image source: 🇧🇷Brazil

Microscopy Challenge: Identifying Findings in Leopard Gecko Feces

Mon, 09 Mar 2026 11:26:53 +0300

Anonymous question from a subscriber. Good morning! Please help identify the findings 🙏 I’ve examined the feces 6 times in a row and at intervals, and I’m finding objects that are unclear to me, in addition to familiar nematodes. Leopard gecko feces (insectivorous), 400x magnification, Lugol’s solution. Other animals do not have such objects (if a question about food arises)

Morphology of Bertiella sp. Egg in Lab Diagnostics

Thu, 19 Feb 2026 18:00:00 +0300

Bertiella sp. egg, released from a gravid proglottid. The arrow points to the hooklets. 💎 Find more useful materials on parasitology in our LAB-TESTS library. The link with access to the library is automatically sent to you via private message after purchasing a VK Donut Labformula subscription.

Plant Pollen Under Microscope: Sheep Sorrel and Goat Willow

Thu, 12 Feb 2026 18:00:00 +0300

Pollen of Rumex acetosella L. (sheep sorrel) and Salix caprea L. (goat willow) under light microscopy: 1–3 – Rumex acetosella pollen in various projections at different magnifications; 4–6 – Salix caprea pollen in various projections at different magnifications. At the edge of the polar zone (p. z.) of the willow, the exine cells are larger. Scale bar: 10 µm.

Cystoisospora belli Oocysts: Diagnosis of Isosporiasis

Sun, 28 Dec 2025 16:00:00 +0300

Answer to the parasitology exercise: Cystoisospora belli

“An immature oocyst of Cystoisospora belli (formerly known as Isospora belli), containing only one sporoblast, which will eventually develop into two sporoblasts, and then begin to sporulate and become infectious.”

Parasitology Case: Object in Stool with HIV Infection

Sat, 27 Dec 2025 16:00:00 +0300

PARASITOLOGY EXERCISE. The following object was found in the stool of a patient with advanced HIV infection living in Tanzania. Preparations obtained using differential interference contrast microscopy, dark-field microscopy, and fluorescence microscopy are shown. The object’s length is approximately 25-30 micrometers. How do you identify it? ANSWER TOMORROW!

Ancylostomatidae Eggs in Stool: Faust Method Microscopy

Tue, 23 Dec 2025 15:00:00 +0300

Ancylostomatidae eggs observed after processing by the Faust method. The first and second images have 20x and 10x objective magnification, respectively.

Stool Microscopy: Helminth Egg Identification Challenge

Sat, 15 Nov 2025 14:30:00 +0300

An anonymous question from a subscriber. Please judge, whose egg is it? Stool, mag. 40x

Trichuris trichiura Egg in Stool Microscopy

Tue, 11 Nov 2025 15:00:00 +0300

Nematode egg Trichuris trichiura.

Morphology of Dicrocoelium dendriticum Eggs in Fecal Smear

Thu, 06 Nov 2025 18:00:00 +0300

Dicrocoelium dendriticum egg in an unstained wet mount of stool. Source: CDC – DPDx – Dicrocoeliosis. 💎 Find more useful parasitology materials in our LAB-TESTS library. The link with access to the library is automatically sent to you via private message after paying for a VK Donut Labformula subscription.

Microscopy of Parasite Eggs: Schistosoma, Pinworm, Moniezia

Tue, 21 Oct 2025 15:00:00 +0300

Collection of parasite eggs TOP: Schistosoma mansoni, Enterobius vermicularis; BOTTOM: Moniezia benedeni and Moniezia expansa.

Morphology of Hymenolepis nana and Ascaris lumbricoides Eggs

Tue, 07 Oct 2025 15:00:00 +0300

Image of parasite eggs Hymenolepis nana (left) and Ascaris lumbricoides (right).

Entamoeba moshkovskii: Morphology and Pathogenicity

Sat, 27 Sep 2025 08:20:00 +0300

Entamoeba moshkovskii is a species of amoeba from the genus Entamoeba, which was previously considered non-pathogenic, but studies have shown that it can cause diseases in humans. It was first described in 1941 in Moscow (Russia).

Morphology of Helminth Eggs in Stool Microscopy

Tue, 23 Sep 2025 15:00:00 +0300

Collection of parasite eggs.

Necator americanus — Egg of an intestinal helminth (roundworm) causing hookworm infection. Characteristically oval egg.

Opisthorchis viverrini — Egg of a liver fluke causing opisthorchiasis. Small, oval, with a characteristic “tail” at one end.

Parasitology Case: Parasite in Blood and Lymph Smears

Sat, 20 Sep 2025 16:00:44 +0300

Examine the photograph of stained human blood smears (a–f) and in lymph (g). Name the family of this parasite.

Parasitology Exercise: Identifying a Blood Parasite

Sat, 20 Sep 2025 16:00:01 +0300

🐍 Parasitology Exercise. Examine the Giemsa-stained blood smear micropreparation. Can you identify the parasite? 🔎THE CORRECT ANSWER TO THE EXERCISE will be available tomorrow

Morphology of Hookworm Filariform L3 Larva

Thu, 21 Aug 2025 18:00:00 +0300

Filariform (L3) hookworm larva.

Source: CDC - DPDx - Intestinal Hookworm. 💎 Find even more useful materials on parasitology in our LAB-TESTS library. The link with access to the library is automatically sent to you via private message after paying for a VK donut Labformula subscription.

Morphology of Entamoeba histolytica and Amebiasis Prevention

Tue, 19 Aug 2025 10:49:00 +0300

Amoeba Entamoeba Histolytica/dispar

Preventive measures: Personal hygiene: Wash hands frequently, especially after using the toilet and before preparing food. Basic sanitation rules: Consume purified water and well-cooked food. Avoid consuming contaminated water or food. Food hygiene: Thoroughly wash fruits and vegetables before consuming them raw. Sanitary education: Inform the public about the symptoms of amebiasis and the importance of seeking medical attention if symptoms appear.

Enterobius vermicularis Eggs in Coprogram

Tue, 12 Aug 2025 15:00:00 +0300

Enterobius vermicularis eggs from fecal sediment

Stool Microscopy: Searching for Protozoa in Acute Diarrhea

Fri, 01 Aug 2025 11:30:00 +0300

Anonymous question. Colleagues, do you see a large number of protozoa morphologically similar to Entamoeba histolytica in the photos?

Male, 18 years old. Ill for a week, temperature 40°C. 4 days of liquid stool. Lugol’s solution preparation ×200. Romanowsky-Giemsa stained ×1000. Native preparation ×400 + phone magnification

Diagnosis of Protozoa in Stool: A Microscopy Challenge

Tue, 29 Jul 2025 13:00:01 +0300

Blastocystis hominis?! Stool sample with Lugol’s solution (x1000 magnification, immersion).

Anonymous question from a subscriber.

Parasitology Case: Object Identification in Stool Sample

Tue, 08 Jul 2025 09:51:19 +0300

Anonymous question from a subscriber. Can I ask for help with identification? Child’s stool, Kato stain, 100x magnification.

Trichuriasis: Morphology of Trichuris trichiura Eggs

Sun, 29 Jun 2025 16:00:00 +0300

Correct answer to the parasitology problem. Whipworm egg Trichuris trichiura 💡 Interesting facts

The whipworm does not migrate through the body, unlike the roundworm.
The eggs are unusually resistant: they survive in soil for several years.
Due to blood and protein loss, it can contribute to the development of anemia and hypoalbuminemia in children.
It can live in the intestine for years without manifesting symptoms.
Severe forms are more often observed in children, especially with mixed helminth infections (e.g., with ascariasis).

Morphology of Hymenolepis nana and Ascaris lumbricoides Eggs

Thu, 26 Jun 2025 11:00:01 +0300

Parasite eggs of Hymenolepis nana (left) and Ascaris lumbricoides (right)

💎 Find even more useful materials on parasitology in our LAB-TESTS library. The link to access the library is automatically sent to you via private message after purchasing a VK Donut Labformula subscription.

Trichinellosis: Morphology of Trichinella Nematode Larvae

Thu, 19 Jun 2025 12:05:00 +0300

🔬 Trichinellosis (trichinellosis) is caused by nematodes (roundworms) of the genus Trichinella. Trichinellosis is caused by consuming undercooked meat containing encapsulated larvae. After exposure to gastric acid and pepsin, the larvae are released from the cysts and penetrate the small intestinal mucosa, where they develop into adult worms. Females are 2.2 mm long, males are 1.2 mm. Life expectancy in the small intestine is about four weeks. Females release larvae, which migrate to striated muscles, where they encapsulate.

Diagnostic Exercise: What Was Found in a Soil Sample?

Thu, 19 Jun 2025 11:06:17 +0300

Anonymous question from a subscriber. Findings in soil, please tell me what this is?

Tungiasis: Manifestations and Diagnosis of Tunga penetrans

Thu, 05 Jun 2025 11:00:01 +0300

Tungiasis, also known as sarcopsyllosis or sand flea disease, is a tropical parasitic disease caused by the flea Tunga penetrans. The disease is characterized by the penetration of the female flea into the skin, the formation of an inflammatory infiltrate, itching, and pain in the affected areas. Fleas are usually found between the toes or under the toenails, and people become infected when walking barefoot in tropical and subtropical regions. Adult specimens can be extracted from the lesions.