A5028981400- Helminth infection and control
- Coccidia and coccidiosis research
- Parasite Biology and Host Interactions
- Toxoplasma gondii Research Studies
- Parasitic Infections and Diagnostics
- Mollusks and Parasites Studies
- Parasites and Host Interactions
- Insect Pest Control Strategies
- Animal Nutrition and Physiology
- Herpesvirus Infections and Treatments
- Plant and fungal interactions
- Milk Quality and Mastitis in Dairy Cows
- Ruminant Nutrition and Digestive Physiology
- Genetic and phenotypic traits in livestock
- Rabbits: Nutrition, Reproduction, Health
- Phytochemistry Medicinal Plant Applications
- Animal Genetics and Reproduction
- Essential Oils and Antimicrobial Activity
- Effects of Environmental Stressors on Livestock
- Agriculture Sustainability and Environmental Impact
- Animal health and immunology
- Plant Toxicity and Pharmacological Properties
- Insect and Pesticide Research
- Bee Products Chemical Analysis
- Forensic Entomology and Diptera Studies
Brazilian Agricultural Research Corporation
2014-2024
Munster Technological University
2023
Michigan State University
2023
Agricultural Research Corporation
2022
Instituto Agronômico do Paraná
2008-2021
Ministry of Agriculture, Livestock, and Food Supply
2019
Universidade Federal do Rio de Janeiro
2014
Universidade de São Paulo
2006
Universidade Estadual de Londrina
2004
Abstract Background The integration of molecular data from hosts, parasites, and microbiota can enhance our understanding the complex biological interactions underlying resistance hosts to parasites. Haemonchus contortus , predominant sheep gastrointestinal parasite species in tropics, causes significant production economic losses, which are further compounded by diminishing efficiency chemical control owing anthelmintic resistance. Knowledge how host responds infection parasite, combination...
Abstract Rhipicephalus microplus is an ectoparasite responsible for causing economic losses in livestock farming totalling approximately $3.24 billion dollars per year. The main control method involves the use of chemical acaricides. However, incorrect and intensive these chemicals has led to increasing number reports resistance Therefore, objective this study was develop evaluate a laser prototype with voltage 5 V power 1000 mW reduce development R. microplus. methodology evaluated did not...
Abstract Haemonchus contortus is one of the major gastrointestinal nematodes responsible for significant economic and production losses sheep. Diseases caused by this species lack effective anthelmintic products, search new compounds to replace synthetic anthelmintics has been extensive. The present investigation assesses in vitro activity essential oil melaleuca ( Melaleuca alternifolia ), both free (TTO) nanostructured (nanoTTO), terpinen-4-ol (terp-4-ol) on eggs larvae H. . Tests egg...
Among the gastrointestinal nematodes affecting sheep, Haemonchus contortus is most prevalent and virulent, resulting in health problems production losses. Therefore, selecting sheep resistant to H. a suitable sustainable strategy for controlling endoparasites flocks. Here, 287 lambs of native Brazilian Morada Nova hair breed were subjected two consecutive artificial infections with assessed fecal egg count (FEC), packed cell volume (PCV), live weight (LW). Forty-four animals ranked as having...
Haemonchus contortus is a constraint to sheep production. Seeking reduce the use of hosts and produce parasitic stages in large-scale, 42-day vitro culture protocol H. third-stage larvae was optimized using Dulbecco's modified Eagle's medium (DMEM). In cell-free culture, were maintained at 39.6°C, acidic media (pH 6.1) for 3 or 6 days with Δ4-dafachronic acid followed by DMEM pH 7.4 supplemented not Fildes' reagent. 37°C, supplementation Caco-2 cells compared Fildes. On Day 14, fourth-stage...
The aim of this study was to evaluate the potential uses acacia extract (AE) on Trichostrongylus colubriformis control in sheep. lambs were allocated three groups six animals. Two experimentally infected with third-stage larvae T. and one remained as non-infected control. Thirty days post-infection, animals from treated group supplemented AE. During after treatment, values faecal eggs counts (FEC), number recovered per gram faeces (LPG), FEC accumulated animal during treatment period,...
In the control of tick-borne disease (TBD), resistance to chemical products has been reported and a concern with preservation environment requires alternative procedures infestation by Boophilus microplus worldwide. The use biotherapic preparations is one such alternatives. aim this study was evaluate effects mixture including B. in naturally infested cattle. 27 animals were divided 3 groups (n=9): I – control, received no treatment; II- treated amitraz dip; III- standard...
The parasite Haemonchus contortus is one of the most pathogenic for small ruminants in tropical and subtropical regions worldwide, including Brazil. objective this study was to evaluate structural changes induced adult H. after vitro contact with Acacia mearnsii extract (AE), using scanning electron microscopy. Adult nematodes were collected from a naturally infected lamb. In assay parasites placed AE (100 mg ml-1), two hours at 37oC. used assays (exposed negative controls) analyzed an...
Our goal was to define a breeding objective for Brangus beef cattle in Brazil. Bioeconomic models were produced and used estimate economic values (EVs). The scenarios simulated typical full-cycle production systems that are tropical subtropical regions. contained pregnancy rate (PR), warm carcass weight (WCW), mature cow (MCW), number of nematode eggs per gram faeces (EPG) tick count (TICK). Two series the EV. A deterministic model simulate effects PR, WCW MCW on profitability with constant...
The aim of this study was to perform in vitro screening the antiparasitic potential thirty-five plant extracts against gastrointestinal nematode (GIN) Haemonchus contortus and cattle tick Rhipicephalus microplus. larval development test (LDT) egg hatch (EHT) were performed assess activity GIN; packet (LPT), repellency (RT) adult immersion (AIT) used acaricidal effect. In EHT, Senecio brasiliensis aqueous extract had best IC50 value (1.2 mg.mL-1). LPT AIT, Schinus lentiscifolius hexane...
Abstract This study evaluated the resistance status of Haemonchus contortus from sheep flocks in state São Paulo, Brazil, through comparison between fecal egg count reduction test (FECRT) and larval development (LDT). For FECRT, 35 were selected each five divided into groups treated with: benzimidazole, levamisole, ivermectin, monepantel control. Feces collected for EPG cultures. The LDT was performed using thiabendazole (TBZ), levamisole (LEV), ivermectin aglycone (IVM-A) Zolvix (ZLV)....
Knowledge of free-living stages endoparasite population ecology may guide their control in domesticated ruminants. Our objective was to evaluate sheep gastro-intestinal nematode (GIN) L3 distribution tropical pasture profiles (grass and legume). Three different swards (treatments) were compared: 1) grass-only (G), 2) legume-only (L), 3) one half the paddock with grass another legume (GL). We assessed larval counts (PLC) upper, medium bottom strata, each representing third sward height. Lamb...
O parasitismo gastrintestinal em ovinos acarreta inúmeros prejuízos aos produtores rurais. controle é realizado basicamente através da administração de anti-helmínticos sintéticos o que estimula a seleção parasitas resistentes. uso plantas ricas taninos condensados (TC) apresenta-se como uma alternativa promissora no helmintos ovinos, reduzindo produtos químicos. Esse estudo avaliou efeito in vitro dos TC provenientes acácia (Acacia mearnsii) sobre eclosão ovos e motilidade larvas terceiro...
Tropical pastures can be important natural sources of antioxidant compounds and may impact production quality animal protein with repercussions on human health. The objective this study was to evaluate the concentrations α-tocopherol, condensed tannin (CT) nutritional values tropical species used in grazing. included guinea grass (Panicum maximum), bermudagrass (Cynodon spp.), pigeon pea (Cajanus cajan), soybean (Glycine max), creeping beggarweed (Desmodium incanum), macrocephala stylo...
The study determined the sensitivity and specificity of indirect fluorescent antibody test (IFAT) modified agglutination (MAT) for anti-Toxoplasma gondii detection by analyzing sera from 46 experimentally infected pigs. Values were 95.7% (confidence interval 95%: 84.0-99.2%) 97.8% 87.0-99.9%) in both tests. There was an optimum agreement results between IFAT MAT evidenced a Kappa 0.86. These validate these tests T. infection despite methodologies with different characteristics readings have...
Abstract The aim of this study was to determine the occurrence anti-Toxoplasma gondii and anti-Neospora caninum antibodies their associated factors among goats in farms from Paraná state, South Brazil. serological analysis performed by indirect ELISA on 629 goat serum samples collected 32 distributed five mesorregions state. Seropositivity observed 30.7% animals for T. gondii, 6.3% N. caninum, 3.0% both agents. Final multiple regression models showed that use assisted reproduction decreased...
O objetivo principal deste trabalho foi avaliar o potencial efeito anti-helmíntico dos taninos condensados sobre Trichostrongylus colubriformis em ovinos experimentalmente infectados e as conseqüências nutricionais destes produtos os animais. Vinte livres de infecção parasitária foram divididos cinco grupos quatro Os GI a GIV com 6000 larvas infectantes (L3) T. colubriformis. mantido como controle infectado GV não infectado. oito dias pós-infecção (p.i.) animais tratados fontes (TC): GII...
Gastrointestinal helminthiasis infections are considerate one of the main limiting factors in sheep production worldwide. The development parasite resistance to anthelmintics has caused significant losses small ruminant production. In search for new alternatives effective control gastrointestinal nematodes ruminants, phytotherapy is a promising field research an attempt reduce usage chemical treatments, aimed at ecological Many plants play crucial role maintaining animal and human life....