Serosurvey of Anaplasma phagocytophilum, Babesia microti, and Ehrlichia chaffeensis in Quilombola Communities of Southern Brazil
Bibliographic record
Abstract
Although quilombola individuals and their dogs may be exposed to hemoparasites such as A. phagocytophilum, B. microti, and E. chaffeensis, no study to date has been conducted in these populations. The aim of this study was to investigate the presence of antibodies against Anaplasma phagocytophilum, Babesia microti, and Ehrlichia chaffeensis in humans and dogs from quilombola communities in Brazil. Serum samples from humans and dogs were collected from four rural quilombola communities and analyzed using indirect immunofluorescence assays. The results revealed antibody levels of 8% for A. phagocytophilum, 3% for B. microti, and 1% for E. chaffeensis in humans and 60%, 50%, and 65%, respectively, in dogs. Notably, women were significantly more likely to be seropositive for A. phagocytophilum than men (p = 0.0289). Dogs from the Serra do Apon community more commonly had A. phagocytophilum (p = 0.0477) and B. microti (p = 0.0448) than those from the other areas. To the best of our knowledge, this is the first study to report human exposure to A. phagocytophilum and the ocurrence of B. microti in Brazil. The antibody level of vector-borne diseases in humans is a public health concern, particularly in vulnerable populations and rural areas. The dogs were universally hosted Rhipicephalus sanguineus ticks, suggesting their possible role in transmission. Thus, further epidemiological surveillance studies should be conducted in vulnerable populations to mitigate the impact of such zoonotic diseases.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".