Prevalence and intensity of Haemogregarina balli (Apicomplexa: Adeleina: Haemogregarinidae) in three turtle species from Ontario, with observations on intraerythrocytic development

1992 ◽  
Vol 70 (1) ◽  
pp. 123-128 ◽  
Author(s):  
Mark E. Siddall ◽  
Sherwin S. Desser
Keyword(s):  
Chrysemys Picta ◽  
Chelydra Serpentina ◽  
Intensity Data ◽  
Lower Prevalence ◽  
Prevalence Data ◽  
Independent Evidence ◽  
Turtle Species ◽  
History Of ◽  
Free Ranging ◽  
Qualitative Changes

Free-ranging populations of turtles, Chelydra serpentina serpentina, Chrysemys picta marginata, and Clemmys insculpta, were examined for prevalence and intensity of Haemogregarina balli during the summers of 1989 and 1990 in Algonquin Park, Ontario. Prevalence data indicated that C. s. serpentina was the primary intermediate host. The lower prevalence in C. p. marginata and C. insculpta is attributed in part to the relatively smaller surface area available for the attachment and bite of the definitive host, Placobdella ornata. Intensities of bloodstream stages in C. p. marginata and C. insculpta were rarely greater than 1 in 104 erythrocytes. The intensity in C. s. serpentina ranged from 0.5 to 30.0 in 103 erythrocytes. Intensity data for C. s. serpentina demonstrated quantitative and qualitative changes in parasitaemia in 2-week intervals in 1990. It is suggested that the biology of P. ornata is an important influence in these changes. Microscopic and statistical analysis provided independent evidence for binary fission of merozoites in the life history of H. balli.

scholarly journals Leech (Annelida: Hirudinea) Infestations on Canadian Turtles, Including the First Canadian Record of Helobdella modesta from Freshwater Turtles

2009 ◽  
Vol 123 (1) ◽  
pp. 44 ◽  
Author(s):  
Christina M. Davy ◽  
Kum C. Shim ◽  
Suzanne M. Coombes
Keyword(s):  
High Frequency ◽  
Chrysemys Picta ◽  
Chelydra Serpentina ◽  
Freshwater Turtles ◽  
Turtle Species ◽  
Emydoidea Blandingii ◽  
Clemmys Guttata ◽  
Sternotherus Odoratus

We collected leeches from freshwater turtles at two sites in southwestern Ontario. Five leech species (Placobdella parasitica, P. ornata, Helobdella modesta, Erpobdella punctata and Alboglossiphonia heteroclita) were collected from five turtle species (Chrysemys picta, Chelydra serpentina, Clemmys guttata, Emydoidea blandingii and Sternotherus odoratus). We report a new leech record (P. ornata) for C. guttata. The unexpectedly high frequency of H. modesta on freshwater turtles is discussed.

scholarly journals Catatropis pakistanensis n. sp. (Trematoda: Notocotylidae) from Northern shovelers, Anas clypeata (Anatidae: Aves) from Pakistan with some remarks on the history of Catatropis species

2012 ◽  
Vol 49 (1) ◽  
pp. 43-48 ◽  
Author(s):  
R. Schuster ◽  
G. Wibbelt
Keyword(s):  
Electron Microscopy ◽  
Histological Evaluation ◽  
Thin Sections ◽  
Genital Opening ◽  
Morphological Studies ◽  
Anas Clypeata ◽  
History Of ◽  
Free Ranging ◽  
A New Species ◽  
Scanning Electron

AbstractFive out of 15 free-ranging Northern shovelers (Anas clypeata Linneus) caught in Pakistan were infected with notocotylid trematodes. Out of the 31 flukes, 10 specimens were used morphological studies, 4 others were also examined by scanning electron microscopy and one remaining trematode was cut in serial semi-thin sections for histological evaluation in order to describe a new species. Like all species of this genus, Catatropis pakistanensis n. sp has a median ridge starting posterior to the basis of the cirrus sac and extends posterior to the ovary. Bilateral to this ridge there are two rows of 9–10 ventral papillae each. Metraterm and cirrus sac are equally in length. In contrast to most other Catatropis spp. the genital opening in C. pakistanensis is situated between the oral sucker and bifurcation of the caeca.

Abstract 2213: Characteristics of Aspirin Non-Responders: Results from the Aspirin Resistance Testing and Initial Strategy for Treatment (ARTIST) Multicenter Trial

Circulation ◽  
2007 ◽  
Vol 116 (suppl_16) ◽  
Author(s):  
Lori B Daniels ◽  
Paul Clopton ◽  
W. F Peacock ◽  
Richard Nowak ◽  
Alex Harrison ◽  
...  
Keyword(s):  
Clinical Characteristics ◽  
Multicenter Trial ◽  
Aspirin Resistance ◽  
Resistance Testing ◽  
Lower Prevalence ◽  
Therapeutic Implications ◽  
Factors Associated ◽  
Coronary Syndrome ◽  
Initial Strategy ◽  
History Of

Introduction: Aspirin (ASA) therapy reduces the risk of thrombotic events by inhibiting platelet aggregation, however some individuals have a diminished response to ASA. The ability to predict ASA non-responsiveness has important therapeutic implications. We studied patients with suspected acute coronary syndrome (ACS) to determine the characteristics of patients with ASA non-responsiveness. Methods: We enrolled 1010 patients with suspected ACS in the emergency departments (ED’s) of 5 sites. All subjects were on outpatient ASA therapy or received ASA in the ED, and were excluded if on clopidogrel. Blood was tested for ASA non-responsiveness (defined as ASA reactive units ≥ 550) on a VerifyNow® (Accumetrics) device. Results: Overall prevalence of ASA non-responsiveness was 10.3% (95% C.I. 8.6–12.3%). Responsiveness to ASA did not differ by age or sex, but varied significantly by race. Hispanics had a higher prevalence of ASA non-responsiveness, while whites and Asians had a lower prevalence ( Figure ). Other factors associated with increased prevalence of ASA resistance included outpatient ASA therapy (p<0.001), a history of alcohol (p=0.045) or drug abuse (p=0.02), a history of heart failure (p=0.01), and renal insufficiency (p=0.003). Patients with ASA non-responsiveness had lower BMI (p=0.006) and hemoglobin (p<0.001), and higher BNP levels (p<0.001), prothrombin time (p=0.01), and partial thromboplastin time (p<0.001). Conclusions: Among suspected ACS patients, the prevalence of ASA non-responsiveness varies by race and is highest in Hispanics. ASA resistance is also more prevalent in patients with clinical characteristics consistent with poorer health. Prevalence of ASA Non-Responsiveness by Race

scholarly journals Over-wintering Characteristics of West-Central Wisconsin Blanding's Turtles, Emydoidea blandingii

2010 ◽  
Vol 124 (2) ◽  
pp. 134 ◽  
Author(s):  
Richard P. Thiel ◽  
Timothy T. Wilder
Keyword(s):  
Chrysemys Picta ◽  
Anoxia Tolerance ◽  
Chelydra Serpentina ◽  
Emydoidea Blandingii ◽  
Anoxic Conditions ◽  
Painted Turtles ◽  
West Central ◽  
Remarkable Degree ◽  
Snapping Turtles

Hibernation of adult-sized Blanding's Turtles was studied at two west-central Wisconsin sites between 1991 and 2008. Turtles arrived at hibernacula from mid September to early October, spending 126 to 216 days at these sites, and generally emerged in early April yearly. Sixty percent of females and 30 percent of males hibernated in natural over man-made structures as hibernation sites. Anoxic conditions near five hibernation sites ranged from 78 to 100 days. Shell temperatures of three turtles monitored over five winters remained at <1°C a mean of 2,274 hours each winter. Over the same period, four turtles' temperatures were between 0° and -1°C a mean of 302 hours. During the course of our study, hibernating west-central Wisconsin Blanding's Turtles demonstrated a remarkable degree of both cold and anoxia-tolerance similar to that observed among Painted Turtles (Chrysemys picta) and Snapping Turtles (Chelydra serpentina).

Biochemical and physiological parameters associated with Trypanosoma evansi prevalence in wild capybaras (Hydrochoerus hydrochaeris)

2017 ◽  
Vol 95 (12) ◽  
pp. 913-919 ◽  
Author(s):  
A.T. Eberhardt ◽  
P.M. Beldomenico ◽  
L.D. Monje ◽  
A.L. Racca
Keyword(s):  
Trypanosoma Evansi ◽  
Physiological Parameters ◽  
Hydrochoerus Hydrochaeris ◽  
Host Health ◽  
History Of ◽  
Wildlife Populations ◽  
The Individual ◽  
Host Parasite ◽  
Free Ranging ◽  
The Impact

Parasites can be detrimental to the health of wildlife populations and may negatively affect several aspects of the life history of their hosts. Investigating host health, therefore, is key to understanding important mechanisms of the host–parasite interaction at the individual and population levels. Recently, we reported a prevalence of 10% of Trypanosoma evansi Steel, 1884 in a population of capybaras (Hydrochoerus hydrochaeris (L., 1766)) from Esteros del Iberá, Argentina; however, the impact of T. evansi infection on capybaras is unknown. The aim of this study was to explore associations between T. evansi infection and biochemical and physiological parameters in wild capybaras using blood samples (n = 60) from a managed population of free-ranging capybaras from Esteros del Iberá. Infection by T. evansi was negatively associated with body condition, albumin, alpha-2 globulin concentrations, albumin/globulin ratio, and eosinophil counts, and it was positively associated with spleen index and gamma-globulin concentrations. These results suggest that T. evansi infection may pose a significant impact on the health of wild capybaras.

Thermal and Behavioral Respones to Feeding in Free-Ranging Turtles, Chelydra serpentina

1991 ◽  
Vol 25 (3) ◽  
pp. 273 ◽  
Author(s):  
Gregory P. Brown ◽  
Ronald J. Brooks
Keyword(s):  
Chelydra Serpentina ◽  
Free Ranging

scholarly journals On the origin of mongrels: evolutionary history of free-breeding dogs in Eurasia

2015 ◽  
Vol 282 (1820) ◽  
pp. 20152189 ◽  
Author(s):  
Małgorzata Pilot ◽  
Tadeusz Malewski ◽  
Andre E. Moura ◽  
Tomasz Grzybowski ◽  
Kamil Oleński ◽  
...  
Keyword(s):  
East Asian ◽  
Domestic Dog ◽  
Indigenous Status ◽  
Westward Expansion ◽  
Pure Breed ◽  
Archaeological Data ◽  
Genome Wide ◽  
History Of ◽  
Western Eurasia ◽  
Free Ranging

Although a large part of the global domestic dog population is free-ranging and free-breeding, knowledge of genetic diversity in these free-breeding dogs (FBDs) and their ancestry relations to pure-breed dogs is limited, and the indigenous status of FBDs in Asia is still uncertain. We analyse genome-wide SNP variability of FBDs across Eurasia, and show that they display weak genetic structure and are genetically distinct from pure-breed dogs rather than constituting an admixture of breeds. Our results suggest that modern European breeds originated locally from European FBDs. East Asian and Arctic breeds show closest affinity to East Asian FBDs, and they both represent the earliest branching lineages in the phylogeny of extant Eurasian dogs. Our biogeographic reconstruction of ancestral distributions indicates a gradual westward expansion of East Asian indigenous dogs to the Middle East and Europe through Central and West Asia, providing evidence for a major expansion that shaped the patterns of genetic differentiation in modern dogs. This expansion was probably secondary and could have led to the replacement of earlier resident populations in Western Eurasia. This could explain why earlier studies based on modern DNA suggest East Asia as the region of dog origin, while ancient DNA and archaeological data point to Western Eurasia.

scholarly journals Hybridization of domestic mink with wild American mink (Neovison vison) in eastern Canada

2017 ◽  
Vol 95 (6) ◽  
pp. 443-451 ◽  
Author(s):  
Jeff Bowman ◽  
Kaela Beauclerc ◽  
A. Hossain Farid ◽  
Heather Fenton ◽  
Cornelya F.C. Klütsch ◽  
...  
Keyword(s):  
Gene Flow ◽  
Native Species ◽  
Allelic Richness ◽  
American Mink ◽  
Neovison Vison ◽  
Genetic Integrity ◽  
Eastern Canada ◽  
History Of ◽  
Free Ranging ◽  
Wild Mink

Farmed American mink (Neovison vison (Schreber, 1777)) pose a risk to biodiversity owing to escape and release from farms. Feral mink may affect native species in locations where American mink are not endemic, such as Europe. In contrast, escaping domestic mink may hybridize with wild mink in North America, leading to introgression of domestic traits via hybrid-mediated gene flow. We tested this idea in eastern Canada, which has a history of mink farming. We sampled known domestic and free-ranging mink, and profiled 508 individuals at 15 microsatellite loci. We found that 33% of free-ranging mink were either escaped domestic individuals, domestic–wild hybrids, or were introgressed to domestic or wild parental groups. The greatest prevalence of free-ranging domestic, hybrid, or introgressed mink (59%) occurred in Nova Scotia, which also had the most mink farms. Historic (1980s or earlier) mink sampled from museums had higher allelic richness and private allelic richness than contemporary wild mink. Domestic mink are artificially selected for traits desired by farmers, and as such, introgression with wild mink may lead to a loss of local adaptation. Our findings demonstrate that continued escape and release of mink could pose risks to the maintenance of genetic integrity in wild mink.

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