Time series analysis of the prevalence of endoparasitic infections in cats and dogs presented to a veterinary teaching hospital
Abstract
The apparent prevalence of endoparasitic infections of cats and dogs presented to the small animal Veterinary Hospital of the University of Pennsylvania was measured between 1984 and 1991. Two thousand feline and 8077 canine fecal samples were examined along with 6830 canine blood samples. The overall mean monthly prevalence of feline infections was 16% for ascarids, 0.9% for hookworms, 4.0% for tapeworms, 2.4% for Giardia spp. and 4.2% for coccidia. The overall mean monthly prevalence of canine infections was 5.7% for ascarids, 9.7% for hookworms, 9.7% for whipworms. 1.8% for tapeworms, 4.7% for Giardia spp. and 3.1% for coccidia. There was a significant downward trend in the prevalence of hookworms and heartworms in dogs (P < 0.001 in both cases). There was a significant upward trend in the prevalence of tapeworms in cats (P < 0.05). There were no significant long-term trends in any of the other time series. The smoothed data were analyzed for seasonal trends. None of the autocorrelation analyses gave incontrovertible evidence of seasonality. The repeated peaks at the 6, 12 and 24 month lags in the case of ascarid infections were suggestive of a 12 month seasonality with a peak prevalence in December, but the results were not statistically significant at the 5% level. Hookworms and whipworms in dogs occurred together more than would be expected by chance in 4 out of the 6 years for which data were available.
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Companion animals are virtually subjected for all their lifespan to continuous re-infection by roundworms and hookworms, even when they have a lifestyle far from that of stray animals or of animals kept in shelter or refuges.
“companion animals, which, in turn, are virtually subjected for all their lifespan to continuous re-infection by roundworms and hookworms, even when they have a lifestyle far from that of stray animals or of animals kept in shelter or refuges [47,188-190]”
From Pet roundworms and hookworms: A continuing need for global worming (2012) · cites this paper as [189]
A possible association between the presence of T. vulpis and the hookworm Ancylostoma caninum has been detected in infected dogs.
“a possible association between the presence of T. vulpis and of the hookworm Ancylostoma caninum has also been detected in infected dogs [6,9,10].”
From Are we paying too much attention to cardio-pulmonary nematodes and neglecting old-fashioned worms like Trichuris vulpis? (2011) · cites this paper as [10]
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Self-citation
- Authors
- Nolan, T. J., & Smith, G.
- Affiliations
- University of Pennsylvania (US)
- Corresponding author
- Nolan, Thomas J.
- ORCID
- Nolan, Thomas J.
- Venue
- Veterinary Parasitology
- Publisher
- Elsevier BV
- Published
- 1995-09
- Volume
- 59
- Issue
- 2
- Pages
- 87-96
- ISSN
- 0304-4017 (ISSN-L)
- OpenAlex
- W2080122304
- Cited by
- 97
- References
- 15
- Citations by year
- 2025: 4 · 2022: 2 · 2021: 8 · 2020: 8 · 2019: 5 · 2017: 3 · 2016: 4 · 2015: 4 · 2014: 4 · 2013: 5 · 2012: 1
- FWCI
- 0.00
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Veterinary Parasitology (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Health Sciences › Veterinary › Small Animals › Helminth infection and control
- Health Sciences › Medicine › Pathology and Forensic Medicine › Parasitic infections in humans and animals
- Life Sciences › Immunology and Microbiology › Parasitology › Parasitic Infections and Diagnostics
- Keywords
- endoparasitic infections, prevalence trends, cats, dogs, ascarids, hookworm, Trichuris trichiura, cestodes, Giardia, coccidia, Dirofilaria immitis, seasonal variation, fecal analysis, blood analysis, veterinary teaching hospital
- MeSH terms
- Aging, Animals, Ascariasis, Cat Diseases, Cats, Cestode Infections, Coccidiosis, Dirofilariasis, Dog Diseases, Dogs, Giardiasis, Hookworm Infections, Hospitals, Animal, Hospitals, Teaching, Parasitic Diseases, Parasitic Diseases, Animal, Pennsylvania, Seasons, Species Specificity, Time Factors, Trichuriasis, Prevalence
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