To date, 9 species of Schistosomatidae have been found parasitizing the nasal tissues mammal and bird hosts in Eastern Hemisphere, 5 Rwanda (Africa), 2 Australia (Oceania) Eurasia. During a parasitological survey black necked swans, Cygnus melancoryphus, an anatid endemic to South America, schistosome worms tissue were found; first Americas. Morphological results based on male isolated eggs. The spiny tegument, filiform body with rounded posterior end, two muscular suckers, robust...

Trichobilharzia is a genus of threadlike schistosomes with cosmopolitan distribution in birds. Species achieve notoriety as major etiological agents cercarial dermatitis, or swimmer's itch. There are 40 species described the literature, for which majority lacks molecular sequence information. To better understand phylogenetic relationships, diversity, boundaries, host use, and geographic this better, we surveyed 378 birds over 10,000 snails from North America. The analysis was based on...

Fasciolid flukes are among the largest and best known digenetic trematodes have considerable historical veterinary significance. Fasciola hepatica is commonly implicated in causing disease humans. The origins, patterns of diversification, biogeography fasciolids all poorly known. We undertaken a molecular phylogenetic study using 28S, internal transcribed spacer 1 2 (ITS-1 ITS-2) nuclear ribosomal DNA, mitochondrial nicotinamide dehydrogenase subunit ( nad 1) that included seven nine...

Physa acuta is a globally invasive freshwater snail native to North America. Prior studies have led conflicting views of how P. populations are connected and genetic diversity partitioned globally. This study aims characterize phylogeographic population structure within the range acuta, elucidate its invasion history assess global patterns diversity. Further, using meta-analytic methods, we test 'Enemy-Release hypothesis' - digenetic trematode system. The refers loss parasites following...

Revealing diversity among extant blood flukes, and the patterns of relationships them, has been hindered by difficulty determining if specimens described from different life cycle stages, hosts, geographic localities, times represent same or species. Persistent collection all available stages provision exact host identification, reference DNA sequences for parasite, voucher eventually will provide framework needed to piece together individual cycles facilitate reconciliation with classical...

SUMMARY Paramphistomoids are ubiquitous and widespread digeneans that infect a diverse range of definitive hosts, being particularly speciose in ruminants. We collected adult worms from cattle, goats sheep slaughterhouses, cercariae freshwater snails ten localities Central West Kenya. sequenced cox 1 (690 bp) internal transcribed region 2 (ITS2) (385 genes small piece 79 different stained mounted the remaining worm bodies for comparisons with available descriptions. also ITS2 41...

Studies estimating genetic diversity and population structure in multi-host parasites are often constrained by temporally spatially limited sampling. This study addresses these limitations analyzing globally distributed samples of three congeneric avian schistosomes (Trematoda: Schistosomatidae: Trichobilharzia), including collections spanning 20 years archived at The Museum Southwestern Biology, Parasites Division. species exhibited significant differences parameters across one nuclear two...

Abstract Blarina brevicauda is distributed across the northeastern region of North America, in areas previously covered by Pleistocene glaciers. Previous molecular systematic study species genus suggested presence two distinct eastern and western phylogroups within B. , agreement with traditionally recognized semi‐species. To expand previous work, a collection 76 individuals from 14 localities collected throughout range was used to assess mitochondrial (mt) cytochrome b genealogy for this...

Parasites that live in intimate contact with the immune system of their hosts require specialized adaptations to survive such exposed environments. Once adapted these demanding environments, it seems parasites could not easily switch distantly related [1], and, thus, would be good candidates diversify congruently hosts, i.e., cospeciation. One best-known parasite groups is schistosomes, digenetic (having alternating sexually and asexually reproducing generations life cycle) trematodes...

Echinostomes are a diverse group of digenetic trematodes that globally distributed. The diversity echinostomes in Africa remains largely unknown, particularly analyses using molecular markers. Therefore, we were interested the composition and host usage patterns African echinostomes, especially those also use schistosome transmitting snails as intermediate hosts. We collected adults larval stages from 19 different localities East (1 locality Uganda 18 Kenya). In this study provide...

The planorbid gastropod genus Bulinus consists of 38 species that vary in their ability to vector Schistosoma haematobium (the causative agent human urogenital schistosomiasis), other species, and non-schistosome trematodes. Relying on sequence-based identifications bulinids (partial cox1 16S ) ( ITS ), we examined the Lake Victoria Basin Kenya for naturally acquired infections with species. We collected 6,133 from 11 sites between 2014–2021, 226 (3.7%) which harbored infections. found 4...

La errancia y dispersión en tierra adentro de las aves marinas son fenómenos raros cuyas causas consecuencias se entienden poco. Estudiar registros es importante ya que masas continentales forman barreras a la genes parásitos; por lo tanto, permeabilidad terrestres influye qué tanto poblaciones evolucionan trayectorias distintas co-evolucionan con faunas parásitas distintas. Los alcatraces (Sula spp.) constituyen un clado especies obligadas agua salada encuentran oceános tropicales...

SUMMARY Schistosoma kisumuensis n. sp. is described based on 6 adult males and 2 females collected from the circulatory system of 3 murid rodent species, Pelomys isseli, Mastomys natalensis , Dasymys incomtus . Specimens were a single location, Nyabera Swamp, in Kisumu, Kenya Lake Victoria Basin. This new species morphologically similar to members S. haematobium group, currently represented by 8 parasitizing artiodactyls primates, including humans. differs these producing relatively small...

Abstract Cercarial dermatitis (swimmer's itch) is caused by the penetration of human skin cercariae schistosome parasites that develop in and are released from snail hosts. frequently acquired freshwater habitats, less commonly marine or estuarine waters. To investigate reports a outbreak San Francisco Bay, California, we surveyed local snails for infections during 2005–2008. We found schistosomes only Haminoea japonica, an Asian first reported Bay 1999. Genetic markers place this within...

Abstract Although parasites are increasingly recognized for their ecosystem roles, it is often assumed that free‐living organisms dominate animal biomass in most ecosystems and therefore provide the primary pathways energy transfer. To examine contributions of to energetics freshwater streams, we quantified standing trematodes at nine sites three streams western Oregon, USA. We then compared rates flow from snails Juga plicifera into trematode relative aquatic vertebrate predators (sculpin,...

Crassiphialinae Sudarikov, 1960 is a large subfamily of the Diplostomidae Poirier, 1886 with complex taxonomic history. It includes diversity species parasitic in intestines avian and mammalian definitive hosts worldwide.

Birds from the Area de Conservacion Guanacaste in northwestern Costa Rica were surveyed for blood parasites June 2001 and December 2001-January 2002. Of 354 birds examined, representing 141 species of 35 families 15 orders, 44 (12.4%) infected with parasites. Species Haemoproteus (4.8% prevalence), Plasmodium (0.6%), Leucocytozoon (0.3%), Trypanosoma (2.0%), microfilariae (7.6%) recorded. Twelve this survey examined first time. Several new host-parasite associations identified.