Observations were made on the effects of five different methods of laboratory maintenance on the infectivity and virulence of Babesia bigemina for the tick Boophilus microplus. The original isolate was highly infective and virulent, causing premature death of engorged female ticks and reduced egg production. Maintenance of the strain by syringe passage in unsplenectomised calves at six to 10 week intervals reduced both its infectivity and virulence for ticks. When slow passages were preceded by a series of rapid passages in splenectomised calves, the changes to the strain were less pronounced. The other three procedures, rapid syringe passage in splenectomised calves and tick passage in either splenectomised or intact calves, had no statistically significant effect on the characteristics measured.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Molecular screening of Babesia, Hepatozoon, and Theileria (Apicomplexa: Piroplasmida) in ticks (Acari: Ixodidae) infesting farm ruminants in Peninsular Malaysia.
Trop Biomed
December 2024
Department of Medical Microbiology and Parasitology, Faculty of Medicine, Universiti Teknologi MARA, Sungai Buloh Campus, Jalan Hospital, 47000 Sungai Buloh, Selangor, Malaysia.
Ticks are obligate hematophagous arachnids that feed on both humans and animals. Despite the extensive research on detection of bacteria in ixodid ticks in Malaysia, there remains limited knowledge about the detection of protozoa in these ectoparasites, especially in those that feed on farm ruminants. In this study, 1,241 ticks belonging to four species (Rhipicephalus microplus, R.
View Article and Find Full Text PDFComparative Analysis of Immune Response Genes Induced by a Virulent or Attenuated Strain of .
Int J Mol Sci
January 2025
Centro Nacional de Investigación Disciplinaria en Salud Animal e Inocuidad, Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias, Jiutepec 62550, Mexico.
RNA-seq technology has been widely used for the characterization of the transcriptome profile induced by several diseases in both humans and animals. In the present study, RNA-seq was used to identify the differential expression of genes associated with the immune response in cattle infected with two different strains of , both derived from the same Mexican field isolate, which exhibit distinct phenotypic characteristics: the virulent strain, capable of producing acute clinical signs, and the attenuated strain, capable of stimulating a protective immune response when used as an immunogen with an efficacy greater than 80%. The differential gene expression analysis performed revealed a total of 620 differentially expressed genes (DEGs).
View Article and Find Full Text PDFMicroscopic and molecular studies of bovine Babesiosis in Sulaymaniyah, Iraq.
Vet Parasitol Reg Stud Reports
January 2025
Molecular Diagnostic Laboratory, Sulaimani Veterinary Directorate, Salim Street, Sulaymaniyah 46004, Kurdistan Region, Iraq.
Bovine Babesiosis, a tick-borne disease that causes major economic loss in cattle farms, is caused by Babesia species. The diagnosis of the disease is suspected through clinical features (e.g.
View Article and Find Full Text PDFMolecular epidemiological survey of Babesia species infecting cattle in Paraguay.
Vet Parasitol Reg Stud Reports
January 2025
National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Hokkaido, Japan; WOAH Reference Laboratory for bovine babesiosis, National Research Center for Protozoan Diseases, Obihiro University of Agriculture and Veterinary Medicine, Obihiro, Hokkaido, Japan. Electronic address:
Paraguay, an agricultural country in South America, has a high prevalence of tick infestations in its cattle population due to warm temperatures, high humidity, and extensive grazing management practices. Consequently, Babesia infections, which are transmitted by ticks, might have a wide distribution in Paraguay, but the current status of these infections remains uncertain. Therefore, we aimed to assess the infection status of three clinically significant Babesia species, including Babesia bovis, Babesia bigemina, and Babesia naoakii, among cattle populations in Paraguay.
View Article and Find Full Text PDFApplication of molecular approach in combination with providing treatment and control measures for combating and infections in small scale livestock farms in Thailand.
Parasite Epidemiol Control
February 2025
Department of Parasitology, Faculty of Veterinary Medicine, Kasetsart University, Lad Yao, Chatuchak, Bangkok 10900, Thailand.
Bovine babesiosis is a tick-borne disease that is caused by apicomplexan protozoan parasite in the genus of infections affect cattle health, reduce milk and meat production and lead to economic losses in tropical and subtropical countries. parasites are difficult to diagnose in the early stage of infections during low parasitemia and asymptomatic conditions led to the lack of treatment and control at the early stage of infection. This study aimed to integrate a molecular tool for the detection and genetic characterization of in small-scale livestock farming in Thailand, and to study the risk factors association with infections in small scale livestock farms in Thailand.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!