ArticleTropical animal health and production2026
Demonstration of Anaplasma marginale transmission to cattle through the intra-transstadial and by unfed larvae of Rhipicephalus microplus routes, with subsequent calculation of infection rates.
Article in Tropical animal health and production, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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.
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.
Who cites it
1 citing paper in PubMed.
- Vertical transmission, infection dynamics and risk factors for the occurrence of tick fever agents in beef cattle from a tropical region.Tropical animal health and production · 2026Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
13 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
The objective of this study was to assess the infection rate of Anaplasma marginale in cattle by Rhipicephalus microplus. Two experiments were conducted for this purpose. Experiment 1 evaluated the infection rate by the intrastadial and transstadial routes. Calves naturally infected with A. marginale were infested with R. microplus and were called "positive with ticks" (PWT). These PWT animals were housed together with A. marginale-negative, tick-free calves, called "negative and free-tick" (NFT) for 31 consecutive days. On day 31, the PWT animals were removed from the pens and returned to the farm/herd of origin. The NFT animals remained in the pens until day 84, and the possible infection rate of these calves with A. marginale by cattle ticks via the transstadial or intrastadial route was investigated (using blood smears, PCR, and ELISA). During this period, we evaluated the transfer rate of R. microplus from PWT to NFT animals. As a result of Experiment 1, only adult male and female ticks were found on the NFT animals. The transfer rate of ticks from PWTs to NFT calves was 0.10% (31/28464), and 70% (7 of 10), and all the NFT animals housed along with PWT animals became infected by A. marginale. In Experiment 2, the infection rate of A. marginale in calves by R. microplus larvae was carried out in two steps. The first step involved the use of the first tick generation larvae, which were used to infest (at 40,000 larvae per animal) five NFT calves. If any of these five NFT animals became infected with this rickettsia, fully engorged females detached from these animals were collected to perform the second step of the Experiment 2, conducted with the second-generation larvae. The second-generation larvae came from the first generation. Another five NFT calves were infested with 40,000 larvae/animal from the second tick generation. As a result of Experiment 2, 100% of NFT calves were infected by A. marginale due to infestation with R. microplus larvae of the first and second generations. This tick species has epidemiological importance in the transmission of A. marginale to calves by the intra-transstadial or unfed larval route.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
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.