Evidence map›Paper›PMID 35999592›Full record

ArticleParasites & vectors2022

First evidence of vertical Hepatozoon canis transmission in dogs in Europe.

Ingo Schäfer, Elisabeth Müller, Ard M Nijhof, Heike Aupperle-Lellbach, Gerhard Loesenbeck, Sybille Cramer, Torsten J Naucke

Open access · goldAbstract read
In one paragraph

Article in Parasites & vectors, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 25 papers.

0numbers the graph read from it
0cells of the map it votes in
25citing papers in PubMed
9.1field-weighted citation impact, top 1% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

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

25 citing papers in PubMed, 51 citations in OpenAlex.

  1. Article
  2. Eco-epidemiology ofInternational journal for parasitology. Parasites and wildlife · 2026
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  7. Morphological and molecular detection of Hepatozoon species in amphibians and reptiles from Mato Grosso, Midwest Brazil.Revista brasileira de parasitologia veterinaria = Brazilian journal of veterinary parasitology : Orgao Oficial do Colegio Brasileiro de Parasitologia Veterinaria · 2026
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  8. Article
  9. Review
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  11. Article
  12. Article
  13. Article
  14. Article
  15. A review of Hepatozoonosis caused byJournal of parasitic diseases : official organ of the Indian Society for Parasitology · 2024
    Review
  16. Review
  17. Article
  18. Article
  19. Molecular Survey ofVeterinary sciences · 2023
    Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

7 authors at 2 institutions in 1 country.

Ingo SchäferLaboklin GmbH and Co. KG., Bad Kissingen, Germany. i.schaefer@laboklin.com.
Elisabeth MüllerLaboklin GmbH and Co. KG., Bad Kissingen, Germany.
Ard M NijhofInstitute for Parasitology and Tropical Veterinary Medicine, Freie Universität Berlin, Berlin, Germany.
Heike Aupperle-LellbachLaboklin GmbH and Co. KG., Bad Kissingen, Germany.
Gerhard LoesenbeckLaboklin GmbH and Co. KG., Bad Kissingen, Germany.
Sybille CramerTierärztliche Praxis Jens Cramer, Ganderkesee, Germany.
Torsten J NauckeLaboklin GmbH and Co. KG., Bad Kissingen, Germany.
Laboklin (Germany) · DEFreie Universität Berlin · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundHepatozoon canis is a protozoal agent that is known to be transmitted by oral uptake of H. canis-infected Rhipicephalus sanguineus sensu lato ticks in dogs. Vertical transmission of H. canis has only been described once in a study evaluating dogs from Japan. The aim of this study was to investigate the parasitological status of puppies from a bitch that had tested positive for Hepatozoon spp. prior to giving birth.

findingsA 4-year-old, female, pregnant dog imported from Italy (Sardinia) to Germany showed clinical signs of lethargy and tachypnoea and tested positive for H. canis by PCR. The dog gave birth to eight puppies, one of which was stillborn and another that had to be reanimated. Haematology, buffy coat analysis and a biochemistry profile were performed for each dog. EDTA-blood of the surviving seven puppies and bone marrow, liver, spleen, amniotic fluid, and umbilical cord of the stillborn puppy was tested for the presence of Hepatozoon spp. by PCR. The mother and the seven surviving puppies tested positive for H. canis by PCR at day 62 post-partum. Gamonts were detected in all dogs by buffy coat evaluation. Haematological and biochemistry results revealed mild abnormalities. In the stillborn puppy, spleen, umbilical cord, and amniotic fluid were positive for H. canis.

conclusionThe results confirm that vertical transmission is a possible route of H. canis infection in dogs, demonstrated by molecular detection of the pathogen in the stillborn puppy. In the seven surviving puppies, vertical transmission was the most likely transmission route. A potential impact of the level of parasitaemia on the health of puppies, as well as its pathogenesis, should be investigated further.

Indexed as

CoccidiosisDog DiseasesEucoccidiidaRhipicephalus sanguineusAnimalsDogsFemalePolymerase Chain ReactionPregnancyCanineHepatozoon canisHepatozoonosisInfectionTransplacental

Identifiers

PMID35999592
PMCPMC9396588
OpenAlexW4292738091

What OpenQuestion holds

Textmetadata
LicenceCC BY
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Registered trials

None linked

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.