Leptospira spp. in horses in southern Brazil: Seroprevalence, infection risk factors, and influence on reproduction

2020 ◽  
Vol 73 ◽  
pp. 101552
Author(s):  
Aleksandro S. Da Silva ◽  
Antonise M. Jaguezeski ◽  
Isadora Fabris Laber ◽  
Ana Eucares von Laer ◽  
Luciane T. Lovato ◽  
...  
Keyword(s):  
Risk Factors ◽  
Infection Risk ◽  
Southern Brazil ◽  
Leptospira Spp ◽  
Infection Risk Factors

scholarly journals Occurrence of Leptospira spp. and factors associated with the infection in horses from a military contingent in the Rio Grande do Sul State, Brazil

2021 ◽  
Vol 58 ◽  
pp. e180884
Author(s):  
Mariane Pacheco Bastiani ◽  
Luciane Teresinha Lovato ◽  
Ana Eucares Von Laer ◽  
Luciana Pötter ◽  
Rogério Oliveira Rodrigues ◽  
...  
Keyword(s):  
Risk Factors ◽  
Rio Grande ◽  
Infection Risk ◽  
Rio Grande Do Sul ◽  
High Seroprevalence ◽  
Serum Samples ◽  
Factors Associated ◽  
Leptospira Spp ◽  
Infection Risk Factors ◽  
Military Unit

The seroprevalence of Leptospira spp. and infection risk factors were investigated in horses from a military contingent in the Rio Grande do Sul State, Brazil. A total of 446 horses were evaluated and categorized into 309 mares, 11 stallions, and 126 horses with an average age of three years. To determine seroprevalence, serum samples from all horses were submitted to the microscopic agglutination test against 12 serovars belonging to nine serogroups, usually circulating in equine populations. To investigate the possible risk factors of infection by Leptospira spp., questionnaires were applied in that military unit. The seroprevalence in the horses with an average age of 3 years, mares, and stallions were 57.94% (73/126), 54.05% (165/309), and 45.45% (5/11), respectively. The main risk factors identified were contact with different water sources, the presence of rodents, and contact with wild and domestic animals. The high seroprevalence of anti‑Leptospira spp. antibodies may be associated with the presence of these risk factors. Therefore, the exposure of horses to possible reservoirs of Leptospira spp. should be minimized. Also, the immunoprophylaxis protocol should be reviewed and a shorter interval between vaccinations adopted to control leptospirosis in this herd. 

The Iron Biology Status of Peritoneal Dialysis Patients May be a Risk Factor for Development of Infectious Peritonitis

2019 ◽  
Vol 39 (4) ◽  
pp. 362-374 ◽  
Author(s):  
Marwh Aldriwesh ◽  
Noura Al-Dayan ◽  
Jonathan Barratt ◽  
Primrose Freestone
Keyword(s):  
Risk Factors ◽  
Risk Factor ◽  
Peritoneal Dialysis ◽  
Stress Hormones ◽  
Infection Risk ◽  
Mortality And Morbidity ◽  
Peritoneal Dialysate ◽  
Susceptibility To Infection ◽  
Infection Risk Factors

Background Infectious peritonitis is a clinically important condition contributing to the significant mortality and morbidity rates observed in peritoneal dialysis (PD) patients. Although some of the socioeconomic risk factors for PD-associated peritonitis have been identified, it is still unclear why certain patients are more susceptible than others to infection. Methods We examined the molecular components of human peritoneal dialysate (HPD) in an attempt to identify factors that might increase patient susceptibility to infection. Characterization studies were performed on initial and follow-up dialysate samples collected from 9 renal failure patients on PD. Results Our in vitro data showed that peritonitis-causing bacteria grew differently in the patient dialysates. Proteomic analysis identified an association between transferrin presence and infection risk, as peritoneal transferrin was discovered to be iron-saturated, which was in marked contrast to transferrin in blood. Further, use of radioactive iron-labeled transferrin showed peritoneal transferrin could act as a direct iron source for the growth of peritonitis-causing bacteria. We also found catecholamine stress hormones noradrenaline and adrenaline were present in the dialysates and were apparently involved in enhancing the growth of the bacteria via transferrin iron provision. This suggests the iron biology status of the PD patient may be a risk factor for development of infectious peritonitis Conclusions Collectively, our study suggests transferrin and catecholamines within peritoneal dialysate may be indicators of the potential for bacterial growth in HPD and, as infection risk factors, represent possible future targets for therapeutic manipulation.

Risk Factors for Central Line–Associated Bloodstream Infections in the Era of Prevention Bundles

2014 ◽  
Vol 36 (2) ◽  
pp. 214-216 ◽  
Author(s):  
Devin Callister ◽  
Pauline Limchaiyawat ◽  
Samantha J. Eells ◽  
Loren G. Miller
Keyword(s):  
Risk Factors ◽  
Bloodstream Infection ◽  
Hemodynamic Monitoring ◽  
Bloodstream Infections ◽  
Central Line ◽  
Infection Risk ◽  
Case Control ◽  
Infect Control Hosp ◽  
Infection Risk Factors ◽  
Independent Risk Factors

Little is known about central line–associated bloodstream infection risk factors in the bundle era. In our case-control investigation, we found that independent risk factors for central line–associated bloodstream infection at our center included the number of recent lab tests, catheter duration, and lack of hemodynamic monitoring as the insertion indication.Infect Control Hosp Epidemiol 2014;00(0): 1–3

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