Evidence map›Paper›PMID 42502903›Full record

ArticleVeterinary clinical pathology2026

Life-Stage-Specific Hematological Profiles in Yellow Mealworm Beetles (Tenebrio molitor): Reference Intervals and Hemocyte Characterization.

Simon Maheu, Houda Ben-Miled, Dominique Marullo-Masson, Colin Favret, Carolyn Gara-Boivin, Marie-Odile Benoit-Biancamano

Abstract read
In one paragraph

Article in Veterinary clinical pathology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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1 · What the graph read from it

What it found

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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

0 citing papers in PubMed.

No citing paper in PubMed yet.

4 · The record

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5 · Who and what money

Authors and funding

6 authors.

Simon MaheuDépartement de pathologie et microbiologie, Centre de diagnostic vétérinaire de l'Université de Montréal, Centre de recherche en infectiologie porcine et avicole and Groupe de recherche sur les maladies infectieuses en production animale, Faculté de médecine vétérinaire, Université de Montréal, Saint-Hyacinthe, Canada.ORCID https://orcid.org/0009-0005-9189-9473
Houda Ben-MiledDépartement de pathologie et microbiologie, Centre de diagnostic vétérinaire de l'Université de Montréal, Centre de recherche en infectiologie porcine et avicole and Groupe de recherche sur les maladies infectieuses en production animale, Faculté de médecine vétérinaire, Université de Montréal, Saint-Hyacinthe, Canada.ORCID https://orcid.org/0009-0000-8886-5292
Dominique Marullo-MassonDépartement de pathologie et microbiologie, Centre de diagnostic vétérinaire de l'Université de Montréal, Centre de recherche en infectiologie porcine et avicole and Groupe de recherche sur les maladies infectieuses en production animale, Faculté de médecine vétérinaire, Université de Montréal, Saint-Hyacinthe, Canada.ORCID https://orcid.org/0009-0003-1958-1407
Colin FavretDépartement de sciences biologiques, Faculté des arts et des sciences, Université de Montréal, Montréal, Canada.ORCID https://orcid.org/0000-0001-6243-3184
Carolyn Gara-BoivinAltasciences Preclinical, Laval, Canada.
Marie-Odile Benoit-BiancamanoDépartement de pathologie et microbiologie, Centre de diagnostic vétérinaire de l'Université de Montréal, Centre de recherche en infectiologie porcine et avicole and Groupe de recherche sur les maladies infectieuses en production animale, Faculté de médecine vétérinaire, Université de Montréal, Saint-Hyacinthe, Canada.ORCID https://orcid.org/0000-0003-0244-1179

Funding

Ministère de l'Agriculture, des Pêcheries et de l'Alimentation du Québec IA121693
6 · The paper itself

Abstract

backgroundThe edible insect industry, driven by the nutritional and environmental benefits of mealworms, faces increasing challenges from pathogens affecting Tenebrio molitor farming systems. Hemocyte-based health assessments could provide valuable diagnostic insights, yet standardized hemolymph processing protocols and hematological reference intervals (RIs) are currently lacking for this species.

objectivesThis study aimed to develop practical protocols for hemolymph sampling, refine hemocyte classification, and establish hematological RIs for both larval and adult stages of T. molitor.

methodsAn optimized tearing method, involving capillary collection of hemolymph from a proleg transected at the femoral-tibial joint, was used to sample healthy individuals. Total and differential hemocyte counts were determined using a hemocytometer and Wright-Giemsa-stained smears, respectively, and from distinct insect populations (n = 41-43 samples per group). Hemolymph was analyzed in pools due to the small size of T. molitor. Transmission electron microscopy was conducted on a multinucleated giant hemocyte (MGH) isolated from a histologic slide. RIs were calculated following American Society for Veterinary Clinical Pathology (ASVCP) guidelines, and life-stage differences were statistically assessed.

resultsGranular cells and plasmatocytes predominated, whereas prohemocytes and oenocytoids were rare. MGHs, newly identified in T. molitor, were characterized as a fifth hemocyte population. Significant life-stage differences were observed, warranting separate RIs for larvae and adults. The established RIs were relatively wide, reflecting natural fluctuations in invertebrate hemolymph volume and the unsexed, age-diverse reference population.

conclusionsThis report of hematological RIs for T. molitor lays the groundwork for implementing hemocyte-based health surveillance in yellow mealworm beetle farming.

Indexed as

HemocytesTenebrioAnimalsFemaleHemolymphLarvaLife Cycle StagesReference ValuesColeopteracytologyentomopathologyhematologyhemolymphreference parameters

Identifiers

PMID42502903
PMCPMC13686544

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.