首页期刊导航|Veterinary Parasitology
期刊信息/Journal information
Veterinary Parasitology
Elsevier BV
Veterinary Parasitology

Elsevier BV

Veterinary Parasitology/Journal Veterinary Parasitology
正式出版
收录年代

    Serologic evidence of selected vector-borne pathogens in non-owned dogs in the southeast US & nbsp;

    Perregrino, Ali N.Zohdy, SarahStarkey, Lindsay A.
    4页
    查看更多>>摘要：Vector-borne pathogens (VBP) associated with ectoparasitism are of concern for animal health, and there are many gaps in surveillance and reporting data. The purpose of this study was to test for four VBPs in a subset of non-owned dogs from county humane societies in Alabama and Georgia that were admitted to the Auburn University College of Veterinary Medicine Hoerlein Spay/Neuter Program for health exams and routine pro-cedures, including bloodwork and testing with the 4Dx (R) SNAP (R) Plus (IDEXX Laboratories, Inc., Westbrook, Maine). Visualized ectoparasites were noted and preserved for identification and analysis. From May-October 2019, residual blood (n = 114) was used for preparing blood smears and DNA extraction and PCR. Out of 114 samples, 35.1% (40/114) were seropositive for one or more VBP: Dirofilaria immitis antigen (20.2%; 23/114) and Ehrlichia spp. antibodies (20.2%; 23/114); six VBD-positive dogs (15%) tested positive for both. No dogs had detectable antibodies to Borrelia burgdorferi or Anaplasma spp. (0%; 0/114). Microfilariae of D. immitis were present in 7 blood smears, all from dogs that were D. immitis antigen positive. Morulae or DNA of Ehrlichia or Anaplasma spp. were not identified in any sample. Fleas were documented in 20.4% (23/113) of dogs, 9.7% (11/ 113) were infested with ticks, predominantly Amblyomma americanum, and co-infestations were noted in 2.7% (3/113). Our data indicate that there is substantial VBP risk in Alabama and Georgia, and that the reservoir potential of domestic animals, especially non-owned animals, along with potential wildlife reservoirs warrants further investigation.& nbsp;
      原文链接:
    • NSTL
    • Elsevier

    Clinical characteristics of naturally Babesia gibsoni infected dogs: A study of 60 dogs

    Liu, Pin-ChenLin, Chao-NanSu, Bi-Ling
    6页
    查看更多>>摘要：Babesia gibsoni is increasingly recognized globally as a cause of canine tick-borne anemic disease; however, only a few clinical reports of naturally acquired infection are available. In this systematic study of dogs presenting with B. gibsoni infection, clinical and laboratory data were collected for dogs with PCR-confirmed B. gibsoni infection admitted to the National Taiwan University Veterinary Teaching Hospital (NTUVH) from January 2014 through December 2015. Of the 60 dogs recruited, 20 (33.3%) had concurrent disease and 40 (66.7%) had only B. gibsoni infection. The severity of anemia in B. gibsoni infected dogs with concurrent or without concurrent infection was not significantly different. The most commonly observed hematological abnormalities were anemia (49/60, 81.7%) and thrombocytopenia (37/60, 61.7%). Of 49 dogs, 24 (49%) had severe to very severe anemia (PCV < 20%). The main biochemical abnormalities included hyperglobulinemia (28/53, 52.8%), hyperbilirubinemia (10/28, 35.7%) and elevated hepatic enzyme activity (7/48, 14.6%). In addition, 2 of the 60 the client-owned dogs and 5 of the 33 B. gibsoni-positive stray dogs were detected as having a naturally atovaquone-resistant strain, using the SimpleProbe (R) assay. The study results provide a useful clinical presentation of B. gibsoni infection and raise the issue of the naturally atovaquone-resistant strain currently existing in Taiwan.
      原文链接:
    • NSTL
    • Elsevier

    Neospora caninum infection and reproductive problems in dairy cows from Brazil: A case-control study

    de Souza, Giovanna GatiAmatti, Lidiana ZanettiGarcia, Luana VenancioCosta, Letcia Ramos...
    7页
    查看更多>>摘要：Neosporosis, an infectious disease caused by the protozoan Neospora caninum, has been associated with economic losses in cattle rearing worldwide. However, previous studies have not presented any evidence regarding the association between serological status of neosporosis and alteration of the reproductive parameters. Thus, this study aimed to determine whether N. caninum is associated with reproductive disorders and to evaluate the possible risk factors of the infection. Blood samples from 202 dairy cows, 51 with a history of reproductive disorders (case group) and 151 without (control group), were collected from different farms in Brazil. Epidemiological questionnaires were conducted with all the farmers. Serum samples were subjected to an indirect fluorescent antibody test to detect antibodies against the parasite. In total, 28.22% (57/202) of the cows were seropositive: 47.06% (24/51) from the case group and 21.85% (33/151) from the control group. By logistic regression, cows aged >= 48 months and cows with history of abortion were 4.8 (95% confidence interval [CI] = 1.91-12.05; p = 0.001) and 2.3 (95% CI = 1.06-5.1; p = 0.034) times more likely to be seropositive, respectively. Furthermore, our results show an association between N. caninum seropositivity and abortion in dairy cows from Brazil with poor management conditions and N. caninum seropositivity risk factors for reproductive disorders.
      原文链接:
    • NSTL
    • Elsevier

    First report and risk of infection of Fasciola hepatica (Linnaeus, 1761) in water buffaloes (Bubalus bubalis - Linnaeus, 1758) in Mexico

    Ojeda-Robertos, Nadia F.Peralta-Torres, Jorge A.Parra-Bracamonte, Gaspar M.Cruz-Gonzalez, Alba R....
    3页
    查看更多>>摘要：The aim of this study was to determine the prevalence and risk of Fasciola hepatica infection in water buffaloes (Bubalus bubalis) during peripartum in southeastern Mexico. An observational study was designed, in which 94 pregnant buffalo cows near calving and naturally exposed to F. hepatica were included. Farm visits were made on days 60, 30, 15 prepartum, at calving, and on days 15 and 30 postpartum. Feces were obtained from all animals to confirm the presence of F. hepatica eggs. A group of 49 animals was randomly treated twice at day 60 prepartum and at calving with nitroxynil and the other group (n = 45) was kept untreated. Buffaloes would be treated once presenting a positive coproparasitological diagnosis up to 30 days postpartum. F. hepatica was detected in 5.3% of the buffaloes (5/94) with a prevalence between 1.7 and 12%. It was observed that treated buffaloes had a lower risk (4.08%) of being positive than untreated buffaloes (6.67%) (P > 0.05). It was also found that untreated animals had 1.6 times more risk of being positive than treated buffaloes. This paper presents the first report of F. hepatica in water buffaloes in Mexico, demonstrating that the two preventive treatments reduced F. hepatica egg shedding during parturition. These findings highlight the need for monitoring for F. hepatica even in unreported/silent potential disease areas.
      原文链接:
    • NSTL
    • Elsevier

    Bovine parafilariosis-New autochthonous cases from Germany and summary of recent reports from Europe

    Hamel, D.Visser, M.Mayr, S.Tauchmann, O....
    12页
    查看更多>>摘要：Bovine parafilariosis is an emerging fly-borne disease in central Europe, characterized by seasonal occurrence of hemorrhagic exudations ('bleeding spots') from the end of winter to end of summer. In two cases from Germany reported here, one animal of a small herd in Bavaria and 20 animals on a farm in Baden-Wurttemberg presented bleeding spots from late March and late April 2020, respectively. Exudate samples from both cases were positive for larvated Parafilaria eggs. Examination of the skin and trimmed tissue after slaughter of the animal from Bavaria resulted in the collection of 11 nematodes (two males, eight females, one specimen in fragments). The animal's carcass presented typical yellow-greenish areas and bloody spots on the subcutaneous tissue of the flesh side of the skin. The nematodes were microscopically determined as Parafilaria bovicola. Basic morphometric measurements of two (one intact) male and six female nematodes are within the ranges of published data; length (male/female) 28.8/48.0-64.5 mm; width, 397.6 mu m/430.7-527.6 mu m; distance of cervical papillae to anterior end, 177.6/248.9-337.4; left spiculum/right spiculum (male), 365.3-379.4/149.5-180.3 mu m; gubernaculum 45.0-48.1 mu m; distance of vulva to anterior end (female), 37.3-66.0 mm.& nbsp;In order to gain information on P. bovicola in its vector, 91 cattle-visiting Musca autumnalis flies were collected from the affected animal in Bavaria (36 flies) and from co-pastured animals (55 flies) for PCR analysis and sequencing. A total of 14 flies were PCR-positive for filarial DNA, and sequencing of a fragment of the cox1 gene resulted in identification of P. bovicola (n = 10) and Thelazia gulosa (n = 5).& nbsp;This report presents further cases of bovine parafilariosis in Germany, provides morphometric data on male and female P. bovicola nematodes retrieved from cattle and identified DNA of P. bovicola and T.gulosa in M. autumnalis flies collected at a site of occurrence of bovine parafilariosis.
      原文链接:
    • NSTL
    • Elsevier

    Prevalence, risk factor and diversity of Cryptosporidium in cattle in Latvia

    Deksne, GunitaMateusa, MairaCvetkova, SvetlanaDerbakova, Alina...
    11页
    查看更多>>摘要：The epidemiology of Cryptosporidium spp. in Latvia was investigated by testing fecal samples from 926 animals aged from one day to 24 years for the presence of Cryptosporidium spp. oocysts. The samples were collected from 87 cattle farms and from four slaughterhouses, and analyzed by conventional and fluorescent microscopy, fol-lowed by Cryptosporidium species and C. parvum subtype differentiation. Moreover, using a questionnaire, we surveyed factors that could be relevant as risk factors of Cryptosporidium spp. infection on the farms. Crypto-sporidium spp. were shed by 33.8% of the investigated cattle and at least one shedding animal was found on 77.8% of the farms. In the present study, all four Cryptosporidium species reported to commonly infect cattle and two additional Cryptosporidium species (C. scrofarum and C. ubiquitum) were identified. In addition, mix in-fections of C. parvum/C. bovis, C. bovis/C. ryanae, C. parvum/C. ryanae, C. parvum/C. andersoni and C. bovis/ C. andersoni were observed. C. parvum and C. bovis was mostly prevalent in young animals (0-3 months old) and in addition, diarrhea associated with C. parvum infection was observed only in very young animals. Cryptosporidium andersoni and C. ryanae in age group 0-3 months was observed in low prevalence, while a higher proportion of animals with diarrhea associated with C. andersoni infection was observed in very young animals and with C. ryanae in animals age group 4-24 months. Eight previously described C. parvum subtypes were observed. The majority of the subtypes were in the IIa subtype family, while one subtype was identified from the IId subtype family. The most common subtype was IIaA15G2R1, which was found in 34.2% of the C. parvum successfully subtyped samples. The probability of Cryptosporidium spp. associated diarrhea in cattle decreased significantly with the age of the animals and a prolonged period during which calves were fed with milk.
      原文链接:
    • NSTL
    • Elsevier

    Effect of temperature on the development of the free-living stages of horse cyathostomins

    Briot, L.Chauvin, A.Tapprest, J.Hebert, L....
    4页
    查看更多>>摘要：Cyathostomins are considered as the most prevalent and pathogenic parasites of grazing horses. The development on pastures of the free-living stages of these gastrointestinal worms is particularly influenced by outdoor temperature. Understanding the bionomics of free-living stages is an important prerequisite to implement mathematical models designed to assess the parasitic risk for grazing equids. The aim of this study was to assess the effect of 3 constant temperatures under laboratory conditions (10 +/- 1 & nbsp;?, 23 +/-& nbsp; 2 C, 30 +/- 2 ?) and one fluctuating temperature under outdoor conditions (mean: 17 +/- 4 ?) on the minimum time taken by cyathos-tomin eggs to develop into first/second stage larvae (L1/L2) then into infective third stage larvae (L3) in horse faeces.& nbsp;According to the temperatures, the minimum time taken by eggs to develop into L1/L2 was between 1 and 3 days and into L3 between 4 and 22 days. At 10 ?, the development time of eggs into L3 was the longest and at 30 ? the fastest. The results were consistent with historically available data and their compilation should lead to the improvement of parameterised models assessing the parasitic risk period in grazing equids.
      原文链接:
    • NSTL
    • Elsevier

    Preliminary findings on the gastrointestinal parasites of the brown bear (Ursus arctos) in the Cantabrian mountains, Spain

    Costa, HelenaHartasanchez, RobertoSantos, Ana RitaCamarao, Antonio...
    4页
    查看更多>>摘要：No study is currently available on the parasitofauna of the population of brown bears (Ursus arctos) inhabiting the Cantabrian Mountains in Spain. The aim of the present study was to obtain novel information on diversity and prevalence of gastrointestinal parasites in these individuals. During August 2016 and from May to July 2017, 14 fecal samples were collected from the western Cantabrian bear subpopulation, in the Somiedo Natural Park, in the Spanish province of Asturias. The prevalence of parasites detected was 71% and two genera were identified: Dicrocoelium sp. and Trichuris sp. Since the impact that pathogens such as endoparasites can have on the health of bears, together with other stressors, is still poorly understood, research efforts that include disease surveillance are critical to the successful protection of this emblematic species. Our preliminary findings require further investigations, with a wider sampling effort, and bring awareness for the need of carrying further studies on this area as a part of a proactive species management plan.
      原文链接:
    • NSTL
    • Elsevier

    Distribution and prevalence of Taenia hydatigena, Taenia multiceps, and Mesocestoides spp. in Mongolian sheepdogs

    Temuujin, JanjivUlziijargal, GelegbalsanYeruult, ChultemsurenAmarbayasgalan, Zagd...
    7页
    查看更多>>摘要：Gastrointestinal parasite infections in livestock and companion animals in Mongolia have not been investigated sufficiently. This study aimed to determine the prevalence of cyclophyllid cestodes (Taeniidae and Mesocestoididae) in Mongolian sheepdogs using copro-DNA analysis. Sheepdog fecal samples (n = 1242) were collected from five ecological zones (mountain taiga, forest-steppe, steppe, desert-steppe, and desert) and four geographical regions (Western, Khangai, Central, and Eastern) within 20 of the country's 21 provinces. Among the 1242 samples, 201 (16.2%) tested positive for mitochondrial cytochrome c oxidase subunit 1 (cox1) and ribosomal 12S rRNA encoding genes of cyclophyllid cestodes. Prevalence in the mountain taiga, forest-steppe, steppe, desert-steppe, and desert zones was 29.2%, 15.4%, 15.1%, 20.1%, and 9.1%, respectively. Prevalence in the Western, Khangai, Central, and Eastern regions was 19.9%, 18.6%, 12.1%, and 12.8%, respectively. Taenia hydatigena, Taenia multiceps, and two Mesocestoides species (Mesocestoides sp.1 and Mesocestoides sp.2) were identified. T. hydatigena was found in the samples from all 20 provinces (all five zones and four regions), while T. multiceps was detected in the samples from 19 provinces (all five zones and four regions). Mesocestoides sp.1 infection was detected in the samples from all zones (except desert) and regions; it was detected in 14 provinces. Mesocestoides sp.2 infection was detected in the samples from all zones (except mountain taiga) and regions and found in seven provinces. Cyclophyllidea infection in sheepdogs is highly prevalent across Mongolia, representing a zoonotic risk. Implementation of a surveillance program for sheepdogs and their owners, and the wild animals in all ecological zones should be considered. In addition, control measures, including public awareness campaigns, especially for sheepdog owners, and periodic deworming of sheepdogs are warranted.
      原文链接:
    • NSTL
    • Elsevier

    First description of Onchocerca flexuosa infections in Danish red deer (Cervus elaphus)

    Nielsen, Stine T.Hansen, Mette F.Chriel, MariannPetersen, Heidi H....
    4页
    查看更多>>摘要：The prevalence of Onchocerca infection in wild cervids from Denmark was studied in 119 fallow deer (Dama dama), 123 red deer (Cervus elaphus), 51 roe deer (Capreolus capreolus) and eight sika deer (Cervus Nippon) shot during the hunting season from October 2017 to January 2018 from 18 geographical locations across Denmark. The carcasses were macroscopic checked for nodules, and skin samples were examined for microfilaria. All roe deer, fallow deer and sika deer were negative for Onchocerca, while 30.9% red deer were positive for either microfilaria, nodules or both. Significantly more adult red deer (50.8%; 37.6-62.4; p < 0.0001) were infected with Onchocerca than juveniles < 1 year (7.8%; 2.1-18.5), while there was an insignificant (p = 0.075) difference in prevalence observed between males (17.4%; 7.8-31.4) and females (41.7%; 30.2-53.9). Onchocerca-positive red deer were observed from 91.7% (11/12) of the sampled geographical locations. Species identification was done on adult worms from nodules taken from the lumbar region of 20 red deer of different geographical origin by sequencing the mitochondrial 12S, 16S and nad5 gene fragments. The sequences matched with previously published sequences for Onchocerca flexuosa. The high prevalence of Onchocerca infection caused by O. flexuosa in red deer in Denmark shows that Denmark has favourable vector conditions and a suitable environment for the maintenance of the parasite. To our knowledge, this is the first systematic study of Onchocerca in wild-living cervids in Denmark.
      原文链接:
    • NSTL
    • Elsevier