scholarly journals The prevalence and intensity of infection with helminth parasites in Mus spretus from the Setubal Peninsula of Portugal

1993 ◽  
Vol 67 (2) ◽  
pp. 115-122 ◽  
Author(s):  
J. M. Behnke ◽  
C. Barnard ◽  
J. L. Hurst ◽  
P. K. McGregor ◽  
F. Gilbert ◽  
...  
Keyword(s):  
Helminth Species ◽  
Helminth Parasites ◽  
Mus Spretus ◽  
Cestode Species ◽  
Intensity Of Infection ◽  
Helminth Infections ◽  
Syphacia Obvelata ◽  
Taenia Taeniaeformis ◽  
Species Being ◽  
Stomach Musculature

AbstractThe results of a 5 year study of helminth parasites of Mus spretus, are reported. Six nematode and 5 cestode species were identified but no helminth showed 100% prevalence in M. spretus, the most commonly encountered nematode and cestode species being Syphacia obvelata (46·6%) and Taenia taeniaeformis (22·4%). Among the more unusual helminth species identified was Eucoleus bacillatus, a capillariid nematode inhabiting the stomach musculature. This species was identified in 3 of the 5 years of the study. The results are discussed in the broader context of previous studies and the epidemiology of rodent helminth infections in general.

scholarly journals Prevalence of helminth parasites in free-range chickens from selected rural communities in KwaZulu-Natal province of South Africa

2010 ◽  
Vol 81 (2) ◽  
Author(s):  
S. Mukaratirwa ◽  
M.P. Khumalo
Keyword(s):  
Rural Communities ◽  
Rural Areas ◽  
Nematode Species ◽  
Helminth Species ◽  
Helminth Parasites ◽  
Ascaridia Galli ◽  
Cestode Species ◽  
Intensity Of Infection ◽  
Significant Difference ◽  
Faecal Egg Count

A total of 79 chickens were randomly collected from 4 rural localities and processed to detect the presence of helminth parasites and their prevalences. Sixteen helminth species comprising 12 nematode and 4 cestode species were recorded from the 4 localities. Syngamus trachea and Cyathostoma spp. were the only helminth species recovered from the respiratory tract and the rest of the helminth species were from the gastrointestinal tract. The most prevalent nematode species across the 4 localities were Heterakis gallinarum (prevalence range 80-94.4 %), Gongylonema ingluvicola (43.3-86.7 %), Tetrameres americana (53.3-66.7 %) and Ascaridia galli (22.2-43.8 %) and for cestode species, Raillietina tetragona(16.7-40 %) and Skrijabinia cesticillus (3.3-13.3 %) were the most prevalent in that order.Heterakis gallinarum and T. americana had the highest intensity of infection in chickens acrossall the rural areas compared with other helminth species. There was no significant difference (P > 0.05) observed in the sex distribution for As. galli, Baruscapillaria obsignata (syn. Capillaria obsignata), Eucoleus annulatus (syn. Capillaria annulata), Eucoleus contortus (syn. Capillaria contorta) and Subulura suctoria among the 4 rural areas. However, a significant difference (P<0.05) was observed in the intensity of infection of both males and females for H. gallinarum and T. americana across the 4 localities studied. Tetrameres americana, A. galli, C. obsignata and C. annulata had prevalence and number of females higher than that of males, while H. gallinarum showed the opposite. Prevalence of H. gallinarum and T. americana as determined by faecal egg count were much lower compared with the prevalence as determined by post mortem examination, confirming the limitation of using faecal samples in determining the prevalence of gastrointestinal helminth parasites in chickens.

scholarly journals A Survey of Helminth Infections in the Black Rat from Stara Zagora District, Bulgaria

2017 ◽  
Vol 40 (2) ◽  
pp. 177-182 ◽  
Author(s):  
Petar T. Iliev ◽  
Georgi Zh. Georgiev ◽  
Zvezdelina T. Kirkova ◽  
Borislava G. Chakarova
Keyword(s):  
Rattus Rattus ◽  
Hymenolepis Diminuta ◽  
Helminth Parasites ◽  
Hymenolepis Nana ◽  
Trichuris Muris ◽  
Black Rat ◽  
Helminth Infections ◽  
Syphacia Obvelata ◽  
Aspiculuris Tetraptera ◽  
Taenia Taeniaeformis

AbstractA field study was conducted to disclose the prevalence of different helminth parasites in the black rat, Rattus rattus, in some regions of Stara Zagora district, Bulgaria. Out of 67 examined rats, 53 (79.1%) were found to be positive. Helminths of three classes were detected such as Cestoda: Hymenolepis diminuta (47.8%), Hymenolepis nana (43.3%), Taenia taeniaeformis larvae (7.5%), Taenia polyacantha larvae (1.5%); Secernentea: Syphacia obvelata (4.5%), Aspiculuris tetraptera (3.0%) and Adenophorea: Capillaria hepatica (9.0%), Trichuris muris (3.0%). Of all the investigated rats, 27 (40.3%) were infected by one helminth species and 26 (38.8%) by more than one. Hymenolepis diminuta was a predominant species in cases of single infections (23.9%). The most frequent co-infections were observed by H. nana and H. diminuta (16.4%).

Helminth communities ofNectomys squamipesnaturally infected by the exotic trematodeSchistosoma mansoniin southeastern Brazil

2006 ◽  
Vol 80 (4) ◽  
pp. 369-375 ◽  
Author(s):  
A. Maldonado Júnior ◽  
R. Gentile ◽  
C.C. Fernandes-Moraes ◽  
P.S. D'Andrea ◽  
R.M. Lanfredi ◽  
...  
Keyword(s):  
Schistosoma Mansoni ◽  
Endemic Area ◽  
Dominant Species ◽  
Helminth Species ◽  
Southeastern Brazil ◽  
Infection Rates ◽  
Cestode Species ◽  
Intensity Of Infection ◽  
Helminth Communities ◽  
Subadult Female

AbstractThe water ratNectomys squamipesis endemic in Brazil and found naturally infected withSchistosoma mansoni. Helminth communities, their prevalences, intensity of infection and abundance inN. squamipesin an endemic area of schistosomiasis in the state of Rio de Janeiro, Brazil were studied. Four species of nematodes (Physaloptera bispiculata, Syphacia venteli,Hassalstrongylus epsilonandLitomosoides chagasfilhoi) were recovered in 85.3%, two trematodes (Schistosoma mansoniandEchinostoma paraensei) in 38.8% and one cestode species (Raillietinasp.) in 1.7% of rats examined. Rats were infected with up to five helminth species each, and these were highly aggregated in distribution. ForH. epsilonandS. venteli, intensities and abundances were higher in adult male and subadult female hosts, respectively.Hassaltrongylus epsilon,P. bispiculata,S. venteliandS. mansoniwere classified as dominant species,L. chagasfilhoiandE. paraenseias co-dominant andRaillietinasp. as subordinated. No significant correlation was found in the intensity of infecton between each pair of helminth species.Schistosoma mansoniwas not related to any other helminth species according to their infection rates, althougthS. mansoniwas well established in the natural helminth comunity of the water rat.

Prevalence of Intestinal Helminth Infections of Stray Dogs of Public Health Significance in Lagos Metropolis, Nigeria

2019 ◽  
Vol 9 (1) ◽  
pp. 24-32
Author(s):  
Olatunji Ayodeji Abulude
Keyword(s):  
Public Health ◽  
Health Problem ◽  
Public Health Problem ◽  
Helminth Species ◽  
Intestinal Helminth ◽  
Mixed Infections ◽  
Major Public Health Problem ◽  
Helminth Parasites ◽  
Stray Dogs ◽  
Helminth Infections

Globally, stray dogs have been a major source of zoonoses such as cutaneous larval migrans, visceral larval migrans and hydatidosis. These dogs are recognized as being a major public health problem where their population is unchecked. This study was conducted to determine the prevalence of intestinal helminth parasites of stray dogs in Lagos metropolis. Stools of 96 stray dogs were examined microscopically for ova of these parasites using centrifugation flotation method. Four species of intestinal helminths were identified. The overall prevalence of helminths infection was 61.4%, with Ancylostoma caninum having a prevalence of 62.5%, Toxocara canis 20.8%, Dipylidium caninum 18.7% and Strongyloides stercoralis 2.0%. T. canis had the highest worm burden of 1,250 egg per gram (EPG) while S. stercoralis had the least (100 EPG). The areas with the most helminth infections were Yaba (n=12, X̄=1.58, SD=0.793), Agege (n=11, X̄=1.73, SD=0.786) and Ikotun (n=11, X̄=1.45, SD=0.820). S. stercoralis was only found in samples obtained from Mushin and Ikorodu. Most of the stool samples obtained from this study had mixed infections, 83.3% were infected with three helminth species, 8.3% were infected with four helminth species and none had double infection. Mushin had the most mixed infections (n=4, X̄=1.900, SD=1.101) while Obalende had the least (n=1, X̄=1.000, SD=0.000). Most of the intestinal helminth parasites identified in this study are zoonotic and thus pose a public health problem. Environmental factors seem to influence the health condition of these dogs, thus concerted efforts should be made to reduce the growing population of stray dogs on the street of Lagos.

Helminth parasites of the muskrat (Ondatra zibethicus (L.)) in Newfoundland

1981 ◽  
Vol 59 (11) ◽  
pp. 2172-2176 ◽  
Author(s):  
Michael D. Rigby ◽  
William Threlfall
Keyword(s):  
Alimentary Tract ◽  
Parasite Species ◽  
Parasite Burden ◽  
Helminth Parasites ◽  
Ondatra Zibethicus ◽  
Intensity Of Infection ◽  
Concurrent Infections ◽  
Water Ph ◽  
First Time ◽  
Species Being

One hundred and fourteen muskrats (Ondatra zibethicus (L.)), collected between September 1977 and January 1979 in three areas of insular Newfoundland, were examined for helminths, with 11 species being found (7 Digenea, 2 Cestoda, and 2 Nematoda). Diplostomum mergi was recovered from a mammal for the first time. Distribution along the alimentary tract was examined and all helminths recovered preferred the proximal 60% of the small intestine, except Quinqueserialis quinqueserialis and Trichostrongylus calcaratus, which preferred the caecum. Adult and immature muskrats showed differences in the prevalence and intensity of infection and the adults also had larger concurrent infections. In only one case, namely Hymenolepis evaginata, was a parasite species more prevalent in one sex (the males). Small seasonal differences in prevalence and (or) intensity of infection were noted for some parasites and were related to differences in parasite burden of adult and immature hosts and water temperature. A difference in the occurrence of Digenea between sample areas was related to water pH and hardness.

scholarly journals Host specificity and the probability of discovering species of helminth parasites

Parasitology ◽  
2005 ◽  
Vol 130 (6) ◽  
pp. 709-715 ◽  
Author(s):  
R. POULIN ◽  
D. MOUILLOT
Keyword(s):  
Host Specificity ◽  
Host Species ◽  
Animal Species ◽  
Parasite Species ◽  
Biological Properties ◽  
Helminth Species ◽  
Helminth Parasites ◽  
Taxonomic Range ◽  
Using Data ◽  
Species Being

Different animal species have different probabilities of being discovered and described by scientists, and these probabilities are determined to a large extent by the biological characteristics of these species. For instance, species with broader geographical ranges are more likely to be encountered by collectors than species with restricted distributions; indeed, the size of the geographical range is often the best predictor of a species' date of description. For parasitic organisms, host specificity may be similarly linked to the probability of a species being found. Here, using data on 170 helminth species parasitic in freshwater fishes, we show that host specificity is associated with the year in which the helminths were described. Helminths that exploit more host species, and to a lesser degree those that exploit a broader taxonomic range of host species, tend to be discovered earlier than the more host-specific helminths. This pattern was observed across all helminth species, as well as within the different helminth taxa (trematodes, cestodes, nematodes and acanthocephalans). Our results demonstrate that the parasite species known at any given point in time are not a random subset of existing species, but rather a biased subset with respect to the parasites' biological properties.

Helminth parasites of California quail (Lophortyx californicus) from the Okanagan Valley, British Columbia

1970 ◽  
Vol 48 (4) ◽  
pp. 741-744 ◽  
Author(s):  
R. E. Chandler
Keyword(s):  
British Columbia ◽  
Helminth Species ◽  
The Other ◽  
Helminth Parasites ◽  
Intensity Of Infection ◽  
California Quail ◽  
Okanagan Valley

One hundred and thirty-seven California quail (Lophortyx californicus) were collected from the Okanagan Valley of British Columbia and examined for helminth parasites during the summers of 1965 and 1966. The following helminth species were found parasitizing California quail from four study areas: two cestodes, Rhabdometra odiosa and Choanotaenia infundibulum, and one nematode, Acuaria spinosa.R. odiosa was recovered from quail from all areas; the other two species were less common and more restricted in distribution. The frequency of infection for R. odiosa was 53.8% in adult quail and 45.8% in juvenile quail. Intensity of infection for R. odiosa was 13.5 specimens from adult and 22.4 from juvenile quail. For C. infundibulum the frequency was 1.5% from adult and 9.7% from juvenile quail; intensity was 2 and 1.7 specimens from adult and juvenile quail respectively. A. spinosa was recovered from three adult quail in 1965; none were found in 1966. Neither C. infundibulum nor A. spinosa has previously been reported from California quail.

Helminth parasites of wild cats in north-east Scotland

1980 ◽  
Vol 54 (4) ◽  
pp. 303-308 ◽  
Author(s):  
M. D. B. Burt ◽  
A. W Pike ◽  
L. K Corbett
Keyword(s):  
Nematode Species ◽  
Felis Catus ◽  
Helminth Parasites ◽  
Felis Silvestris ◽  
Toxocara Cati ◽  
Cestode Species ◽  
North East ◽  
Wild Cats ◽  
Taenia Taeniaeformis

AbstractThree cestode species, namelyTaenia taeniaeformisBatsch, 1786,Taenia pisiformis(Bloch, 1780) andMesocestoides litteratus(Batsch, 1786) and one nematode species,Toxocara catiSchrank, 1788, were found in wild cats collected in Grampian region, Scotland. Of the 41 cats examined, 25 wereFelis silvestris, 12 were feralFelis catusand four were hybrids ofF. silvestrisandF. catus.

scholarly journals HELMINTH PARASITES OF THE SUBDESERT TOAD, AMIETOPHRYNUS (BUFO) XEROS (ANURA: BUFONIDAE)

2015 ◽  
Vol 3 (10) ◽  
pp. 75-83
Author(s):  
Yassir Sulieman ◽  
Azzam Afifi ◽  
Higazi M. Awad ◽  
Theerakamol Pengsakul
Keyword(s):  
Helminth Species ◽  
Helminth Parasites ◽  
Intensity Of Infection ◽  
First Time

Sixty-nine subdesert toads, Amietophrynus (Bufo) xeros, were collected in Shendi, Sudan, from August to November 2014, and examined for the first time for the presence of internal helminth parasites. Sixty-seven (97.1%) of the toads were found infected with one or more helminth species including, four Nematoda: Aplectanamacintoshii, Rhabdiasbufonis, Strongyloidesprokopici, and Oswaldocruzia sp.; one Trematoda: Mesocoelium sp.; one Cestoda: Lanfrediella sp. A higher prevalence and intensity of infection was found in male toads compared with females, and old toads were found to harbor a higher prevalence and intensity of infection when compared to younger ones. However, neither of these differences was statistically significant. In addition, there were no significant correlations found between the gender of the toads examined and either the prevalence or intensity of infection of any of the helminth species. Likewise, the prevalence and intensity of infection of the helminth species were not significantly correlated with the snout-vent length of the toads.

scholarly journals Helminth parasites of Natal long-fingered bats, Miniopterus natalensis (Chiroptera : Miniopteridae), in South Africa : research communication

2008 ◽  
Vol 75 (3) ◽  
Author(s):  
K. Junker ◽  
O. Bain ◽  
J. Boomker
Keyword(s):  
South Africa ◽  
Helminth Parasites ◽  
Western Cape ◽  
Cestode Species ◽  
Gauteng Province ◽  
Pregnant Females ◽  
Helminth Infections ◽  
The Mean ◽  
Formed Part ◽  
Study Sites

The helminth community infecting Miniopterus natalensis was studied at two localities, the De Hoop Nature Reserve (DHNR) (n = 57), Western Cape Province and Pretoria (n = 12), Gauteng Province, South Africa. Hosts from the DHNR had formed part of an earlier, unrelated study and were all pregnant females. A single hymenolepidid cestode species, the nematodes Molinostrongylus ornatus and Litomosa chiropterorum together with nematodes of the subfamily Capillariinae were present at both study sites, while a single digenean, Allassogonoporus sp., was only found in hosts from the DHNR. The prevalence of helminth infections was high at both localities, 68.4 % in the DHNR and 77.7 % in Pretoria, whereas the mean intensity of infection was low at the DHNR (3.76 ± 3.15), but higher in Pretoria (10.4 ± 9.9). Molinostrongylus ornatus and, to a lesser extent L. chiropterorum, were the main contributors to the higher intensities in Pretoria. The species richness ranged from 0 to 4 at both localities.

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