Parasitological Diagnosis and Alternative Control in Ruminants

A special issue of Ruminants (ISSN 2673-933X).

Deadline for manuscript submissions: 30 June 2026 | Viewed by 836

Special Issue Editor


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Guest Editor
1. Department of Veterinary Medicine, Federal University of Paraná (UFPR), Curitiba, Brazil
2. School of Veterinary Medicine and Animal Science (FMVZ), São Paulo State University (UNESP), Rua Prof. Dr. Walter Maurício Corrêa, s/n, Botucatu 18618-681, SP, Brazil
Interests: acute-phase proteins; inflammation, immune response; gastrointestinal nematodes; protein electrophoresis; biomarkers; non-invasive biomarkers

Special Issue Information

Dear Colleagues,

Currently, in ruminant production, it is important to consider environmental, social, and economic factors in order to sustainably enhance productivity. The immune response of the host, which is associated with nutrition and breed, also plays an important role in the epidemiology of parasitic diseases. Advances in developing biomarkers to improve the diagnosis of parasitic diseases are essential in achieving a better understanding of the pathophysiology of parasite infections in ruminants. Biomarkers provide important information, supporting the prevention and management of health risks. Additionally, as prophylaxis against gastrointestinal nematode infections relies on the use of anthelmintics and their frequent administration leads to resistance in parasites, we urgently need to identify alternatives and strategies for the control of gastrointestinal parasites. We welcome submissions exploring these topics in any species of ruminant. This Special Issue will gather and highlight research on evidence-based medicine and diagnosis in parasitic diseases in ruminants, as well as alternative control methods in parasites. For this Special Issue, we welcome original research papers, as well as literature reviews, exploring different research areas, such as inflammatory response in parasitic diseases, gastrointestinal parasites, blood parasites, biomarkers for diagnosis, and alternatives and strategies for parasite control.

Dr. Elizabeth Moreira dos Santos Schmidt
Guest Editor

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Keywords

  • inflammation
  • dairy cattle
  • sheep
  • goats
  • proteins
  • helminths
  • biomarkers
  • beef cattle
  • protozoan
  • immune response

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Published Papers (2 papers)

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Research

9 pages, 751 KB  
Communication
Seroprevalence of Anti-Neospora caninum and Anti-Toxoplasma gondii Antibodies in Cattle Intended for Human Consumption in the State of Paraíba, Brazil
by Geraldo Moreira Silva Filho, Jordania Oliveira Silva, Audisio Alves Costa Filho, Roberta Nunes Parentoni, Arthur Willian Lima Brasil, Thais Ferreira Feitosa and Vinícius Longo Ribeiro Vilela
Ruminants 2025, 5(4), 48; https://doi.org/10.3390/ruminants5040048 - 11 Oct 2025
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Abstract
We aimed to assess the seroprevalence of anti-Neospora caninum and anti-Toxoplasma gondii antibodies in cattle intended for human consumption in Paraíba, Brazil, and the associated risk factors. A total of 110 serum samples from slaughtered cattle were analyzed using the Indirect [...] Read more.
We aimed to assess the seroprevalence of anti-Neospora caninum and anti-Toxoplasma gondii antibodies in cattle intended for human consumption in Paraíba, Brazil, and the associated risk factors. A total of 110 serum samples from slaughtered cattle were analyzed using the Indirect Fluorescence Antibody Test (IFAT), with cut-off points of 1:200 for N. caninum and 1:64 for T. gondii. Seroprevalence was 8.2% (9/110) for N. caninum (titers 1:200–1:6400) and 18.2% (20/110) for T. gondii (titers 1:64–1:512). Risk factor analysis revealed that the variable female sex (cows) and the extensive farming system were statistically significantly associated with seroprevalence for N. caninum. Whereas for T. gondii, extensive farming, frequent animal purchase, and the lack of separation between calves and adult cattle were statistically significant. These findings demonstrate the circulation of these parasites in herds, with implications for animal and public health, indicating a potential risk of transmission to definitive hosts and humans through the consumption of raw or undercooked infected meat. Full article
(This article belongs to the Special Issue Parasitological Diagnosis and Alternative Control in Ruminants)
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10 pages, 1421 KB  
Article
Effect of Pasture Height on the Development of Free-Living Stages of Haemonchus contortus and Haemonchus placei
by Cesar Cristiano Bassetto, Michelle Cardoso Santos, Natalia Mizuhira Magro and Alessandro Francisco Talamini do Amarante
Ruminants 2025, 5(3), 43; https://doi.org/10.3390/ruminants5030043 - 10 Sep 2025
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Abstract
Haemonchus contortus and Haemonchus placei infect different species of ruminants, but when small ruminants and cattle share the same pasture, cross-infections can occur. Weather conditions and the herbage microenvironment influence the development and survival of larvae during the free-living stage. Development of free-living [...] Read more.
Haemonchus contortus and Haemonchus placei infect different species of ruminants, but when small ruminants and cattle share the same pasture, cross-infections can occur. Weather conditions and the herbage microenvironment influence the development and survival of larvae during the free-living stage. Development of free-living stages (eggs, L1, L2, and L3) for both nematode species in sheep faeces deposited on short grass (4 cm) and tall grass (60 cm) ground was evaluated during nine days at the beginning of the rainy season. Rainfall occurred during five of the nine days assessed, and the tall and short grass environments demonstrated different temperatures, with a maximum of 34.0 °C to 42.0 °C and 31.0 °C to 38.0 °C and a minimum of 12.0 °C to 17.0 °C and 10.0 °C to 24.5 °C for the short and tall grass, respectively. Due to the development of eggs into infective larvae (L3), decreased egg counts were observed over time in faecal samples from both species and environments. However, some eggs were still present in samples until eight days post-deposition among tall grass. In both environments, the development times for all larval stages were similar. Small numbers of H. contortus larvae were found in the soil and grass, whereas no H. placei larvae were found. In conclusion, the trend of development in different environments was similar for both nematode species; however, the tall grass environment provided better conditions for the development of larval stages of both Haemonchus species. Full article
(This article belongs to the Special Issue Parasitological Diagnosis and Alternative Control in Ruminants)
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