Veterinary and public health aspects of Toxocara spp.

Pet dogs and cats can play an important role in the transmission of zoonotic nematodes such as Toxocara canis and Toxocara cati, by excreting eggs directly into the human environment, without the involvement of vectors or intermediate hosts. Human toxocarosis remains a hazard despite the availability of highly effective anthelmintics for dogs and cats. A good understanding of the biology and epidemiology of these parasites, and the risk factors that lead to their transmission to humans is required for effective prevention strategies. In this respect, the maintenance of high quality continuing education for veterinarians and the provision of suitably presented information to pet owners are of priority importance. A closer collaboration between veterinary and public health professionals within the 'One Health' concept is also required.

[1]  T. Schnieder,et al.  Larval development of Toxocara canis in dogs. , 2011, Veterinary parasitology.

[2]  A. Fahrion,et al.  Toxocara eggs shed by dogs and cats and their molecular and morphometric species-specific identification: is the finding of T. cati eggs shed by dogs of epidemiological relevance? , 2011, Veterinary parasitology.

[3]  J. Vercruysse,et al.  Giardia and other intestinal parasites in different dog populations in Northern Belgium. , 2009, Veterinary parasitology.

[4]  J. Keegan,et al.  A comparison of Toxocara canis embryonation under controlled conditions in soil and hair , 2012, Journal of Helminthology.

[5]  C. Martínez-Carrasco,et al.  Epidemiological Study of Non‐systemic Parasitism in Dogs in Southeast Mediterranean Spain Assessed by Coprological and Post‐mortem Examination , 2007, Zoonoses and public health.

[6]  C. Holland,et al.  Ocular toxocariasis in schoolchildren. , 2004, Clinical infectious diseases : an official publication of the Infectious Diseases Society of America.

[7]  E. Pinelli,et al.  Toxocara and Ascaris seropositivity among patients suspected of visceral and ocular larva migrans in the Netherlands: trends from 1998 to 2009 , 2011, European Journal of Clinical Microbiology & Infectious Diseases.

[8]  F. Meslin,et al.  Dogs and nematode zoonoses. , 2000 .

[9]  I. Robertson,et al.  Enteric parasitic zoonoses of domesticated dogs and cats. , 2002, Microbes and infection.

[10]  S. Kernbaum,et al.  Toxocara canis and human toxocariasis. , 1979 .

[11]  H. Sager,et al.  Coprological study on intestinal helminths in Swiss dogs: temporal aspects of anthelminthic treatment , 2006, Parasitology Research.

[12]  Barriga Oo.  Rational control of canine toxocariasis by the veterinary practitioner. , 1991 .

[13]  Visco Rj,et al.  Effect of age and sex on the prevalence of intestinal parasitism in dogs. , 1977 .

[14]  F. Meslin,et al.  Dogs, Zoonoses and Public Health , 2000 .

[15]  L. Glickman,et al.  Management and treatment options for human toxocariasis. , 2005 .

[16]  J. Debruyne,et al.  Toxocara seroprevalence and childhood asthma among Malaysian children , 2001, Pediatrics international : official journal of the Japan Pediatric Society.

[17]  M. Gassner,et al.  Transmission of toxocariasis. , 1990, The Journal of infectious diseases.

[18]  C. Holland,et al.  Toxocara: The Enigmatic Parasite , 2006 .

[19]  P. Hotez,et al.  Environmental exposure to Toxocara as a possible risk factor for asthma: a clinic-based case-control study. , 2001, Clinical infectious diseases : an official publication of the Infectious Diseases Society of America.

[20]  J. Greve.  Age resistance to Toxocara canis in ascarid-free dogs. , 1971, American journal of veterinary research.

[21]  J. Sprent.  The life history and development of Toxocara cati (Schrank 1788) in the domestic cat , 1956, Parasitology.

[22]  M. Schreurs,et al.  [Toxocara ova in parks and sand-boxes in the city of Utrecht]. , 1993, Tijdschrift voor diergeneeskunde.

[23]  D. Jacobs,et al.  Studies on the control of Toxocara canis in breeding kennels. , 1994, Veterinary parasitology.

[24]  B. D. Del Río-Navarro,et al.  The increase in seroprevalence to Toxocara canis in asthmatic children is related to cross-reaction with Ascaris suum antigens. , 2010, Allergologia et immunopathologia.

[25]  J. Sprent.  Observations on the development of Toxocara canis (Werner, 1782) in the dog , 1958, Parasitology.

[26]  H. van Loveren,et al.  Infection with the roundworm Toxocara canis leads to exacerbation of experimental allergic airway inflammation , 2008, Clinical and experimental allergy : journal of the British Society for Allergy and Clinical Immunology.

[27]  R. Maizels,et al.  How common is human toxocariasis? Towards standardizing our knowledge. , 2009, Trends in parasitology.

[28]  J. H. Lim,et al.  Toxocariasis of the liver: visceral larva migrans , 2008, Abdominal Imaging.

[29]  T. Schnieder,et al.  Vertical transmission of Toxocara cati Schrank 1788 (Anisakidae) in the cat , 2003, Parasitology Research.

[30]  L. Reperant,et al.  Rodents as shared indicators for zoonotic parasites of carnivores in urban environments , 2009, Parasitology.

[31]  P. Schantz,et al.  Toxocaral visceral larva migrans after ingestion of raw lamb liver. , 1992, Clinical infectious diseases : an official publication of the Infectious Diseases Society of America.

[32]  C. Holland,et al.  Contamination of dog hair with eggs of Toxocara canis. , 2008, Veterinary parasitology.

[33]  M. Dryden,et al.  Comparison of common fecal flotation techniques for the recovery of parasite eggs and oocysts. , 2005, Veterinary therapeutics : research in applied veterinary medicine.

[34]  D. Bundy,et al.  Epidemiological characteristics of Toxocara canis zoonotic infection of children in a Caribbean community. , 1986, Bulletin of the World Health Organization.

[35]  R. Piarroux,et al.  Toxocariasis and the skin. , 2005 .

[36]  S. Erat,et al.  The investigation of Toxocara canis eggs in coats of different dog breeds as a potential transmission route in human toxocariasis. , 2008, Veterinary parasitology.

[37]  Greve Jh.  Age resistance to Toxocara canis in ascarid-free dogs. , 1971 .

[38]  S. Lloyd,et al.  Periparturient immunosuppression in the bitch and its influence on infection with Toxocara canis , 1983 .

[39]  L. Glickman,et al.  Seroprevalence of zoonotic toxocariasis in the United States: 1971-1973. , 1985, American journal of epidemiology.

[40]  M. Fisher.  Toxocara cati: an underestimated zoonotic agent. , 2003, Trends in parasitology.

[41]  G. Borsboom,et al.  Relationship between allergic manifestations and Toxocara seropositivity: a cross-sectional study among elementary school children. , 1997, The European respiratory journal.

[42]  D. Barutzki,et al.  Endoparasites in dogs and cats in Germany 1999 – 2002 , 2003, Parasitology Research.

[43]  F. Martínez-Moreno,et al.  Estimation of canine intestinal parasites in Córdoba (Spain) and their risk to public health. , 2007, Veterinary parasitology.

[44]  L. Reperant,et al.  Influence of urbanization on the epidemiology of intestinal helminths of the red fox (Vulpes vulpes) in Geneva, Switzerland , 2007, Parasitology Research.

[45]  J. Keegan,et al.  Contamination of the hair of owned dogs with the eggs of Toxocara spp. , 2010, Veterinary parasitology.

[46]  P A Overgaauw,et al.  Aspects of Toxocara epidemiology: toxocarosis in dogs and cats. , 1997, Critical reviews in microbiology.

[47]  F. van Knapen,et al.  [Negligible risk of visceral or ocular larva migrans from petting a dog]. , 2004, Nederlands tijdschrift voor geneeskunde.

[48]  U. Zimmermann,et al.  Untersuchungen über die Wanderung und Streuung der Larven von Toxocara canis WERNER 1782 (Anisakidae) im definitiven Wirt (Beagle) nach Erst‐ und Reinfektion , 2010 .

[49]  C. Kapel,et al.  Zoonotic risk of Toxocara canis infection through consumption of pig or poultry viscera. , 2004, Veterinary parasitology.

[50]  S. Ruggieri,et al.  An estimation of Toxocara canis prevalence in dogs, environmental egg contamination and risk of human infection in the Marche region of Italy. , 2003, Veterinary parasitology.

[51]  M. Paul,et al.  Zoonoses of people and their pets: a US perspective on significant pet-associated parasitic diseases. , 2010, Trends in Parasitology.

[52]  J. Dubey.  Patent Toxocara canis infection in ascarid-naive dogs. , 1978, The Journal of parasitology.

[53]  J. Matsuo,et al.  Differentiation of Toxocara canis and T. cati eggs by light and scanning electron microscopy. , 2000, Veterinary parasitology.

[54]  A. Fahrion,et al.  Patent Toxocara canis infections in previously exposed and in helminth-free dogs after infection with low numbers of embryonated eggs. , 2008, Veterinary parasitology.

[55]  J. Fechtner,et al.  The prevalence of intestinal parasites in dogs from Prague, rural areas, and shelters of the Czech Republic. , 2007, Veterinary parasitology.

[56]  C. Holland,et al.  Diagnostic limitations and future trends in the serodiagnosis of human toxocariasis. , 2005 .

[57]  L. Kortbeek,et al.  Larva migrans syndrome: toxocara, ascaris, or both? , 1992, The Lancet.

[58]  D. Döpfer,et al.  [Infections with endoparasites in dogs in Dutch animal shelters]. , 2004, Tijdschrift voor diergeneeskunde.

[59]  P. Cooper,et al.  Toxocara canis infection: an important and neglected environmental risk factor for asthma? , 2008, Clinical and experimental allergy : journal of the British Society for Allergy and Clinical Immunology.

[60]  S. Montgomery,et al.  Epidemiologic and zoonotic aspects of ascarid infections in dogs and cats. , 2010, Trends in parasitology.

[61]  A. Wolfe,et al.  Human toxocariasis and direct contact with dogs , 2003, Veterinary Record.

[62]  P. Deplazes,et al.  Wilderness in the city: the urbanization of Echinococcus multilocularis. , 2004, Trends in parasitology.

[63]  J. Reif,et al.  Prevalence of enteric zoonotic organisms in cats. , 2000, Journal of the American Veterinary Medical Association.

[64]  F. Rozgonyi,et al.  Epidemiology: Prevalence of intestinal parasites in dogs in some urban and rural areas of Hungary , 2001, The Veterinary quarterly.

[65]  P. Deplazes,et al.  [Travel medicine of parasitic diseases in the dog]. , 2006, Schweizer Archiv fur Tierheilkunde.

[66]  R. Piarroux,et al.  Cutaneous manifestations of human toxocariasis. , 2008, Journal of the American Academy of Dermatology.

[67]  T. Schnieder,et al.  Transmission trials, ITS2-PCR and RAPD-PCR show identity of Toxocara canis isolates from red fox and dog. , 1999, Veterinary parasitology.

[68]  J. Parsons.  Ascarid infections of cats and dogs. , 1987, The Veterinary clinics of North America. Small animal practice.

[69]  C. Holland,et al.  Exposure and environmental contamination. , 2005 .

[70]  L. Glickman,et al.  Zoonotic visceral and ocular larva migrans. , 1987, The Veterinary clinics of North America. Small animal practice.

[71]  P. Overgaauw.  Prevalence of intestinal nematodes of dogs and cats in The Netherlands. , 1997, The Veterinary quarterly.

[72]  F. van Knapen,et al.  Zoonotic parasites in fecal samples and fur from dogs and cats in The Netherlands. , 2009, Veterinary parasitology.

[73]  C. Holland,et al.  Current and future options for the prevention and treatment of canids. , 2005 .

[74]  S. Hakim,et al.  Prevalence of Toxocara canis antibody among children with bronchial asthma in Klang Hospital, Malaysia. , 1997, Transactions of the Royal Society of Tropical Medicine and Hygiene.

[75]  R. Gasser,et al.  PCR-based methods for identification of potentially zoonotic ascaridoid parasites of the dog, fox and cat. , 1997, Acta tropica.

[76]  M. T. Franklin,et al.  Field Experiments in Lincolnshire on the Chemical Treatment of Soil infected with Heterodera schachtii , 1937, Journal of Helminthology.

[77]  M. Ribicich,et al.  Experimental Infection with Toxocara cati in BALB/c Mice, Migratory Behaviour and Pathological Changes , 2009, Zoonoses and public health.

[78]  O. Barriga.  Rational control of canine toxocariasis by the veterinary practitioner. , 1991, Journal of the American Veterinary Medical Association.

[79]  Y. Kaneda,et al.  Toxocariasis possibly caused by ingesting raw chicken. , 1989, The Journal of infectious diseases.

[80]  M. Schnyder,et al.  [Hair coat contamination with zoonotic helminth eggs of farm and pet dogs and foxes]. , 2011, Berliner und Munchener tierarztliche Wochenschrift.