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Vonfeld I, Prenant T, Polack B, Guillot J, Quintard B. Gastrointestinal parasites in non-human primates in zoological institutions in France. PARASITE (PARIS, FRANCE) 2022; 29:43. [PMID: 36125313 PMCID: PMC9487514 DOI: 10.1051/parasite/2022040] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/09/2022] [Accepted: 08/19/2022] [Indexed: 11/14/2022]
Abstract
Gastrointestinal parasites are frequently encountered in captive non-human primates and infestation may have severe consequences on the animal's health status. Most of these parasites are also transmissible to humans. Nevertheless, little is known about the prevalence and monitoring modalities of gastrointestinal parasitoses in non-human primates housed in zoological institutions and there are currently no guidelines available for their detection and identification. The objective of this study was to identify the main gastrointestinal parasites that may be observed in non-human primates in zoological institutions in France, as well as to develop a decision-making tree to ease their identification. Twenty-four zoological institutions were surveyed, most of which performed fecal examinations routinely on their non-human primates (91.7%). Most institutions used flotation enrichment protocols to detect gastrointestinal parasites (95.2%) and nematodes were the most frequently encountered parasites (73.0%). A total of 252 fecal samples corresponding to 68 different non-human primate species from these institutions were analyzed using sedimentation and flotation protocols. Protozoa (47.3%) were found to be more frequent than helminths (15.6%). Furthermore, old-world monkeys exhibited a higher parasite load (93.6%) than any other non-human primate species category. Compiled data from fecal examinations allowed the development of a decision-making tree and diagnostic atlas to facilitate parasite diagnosis in captive non-human primates.
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Affiliation(s)
- Irène Vonfeld
- Parc Zoologique et Botanique de Mulhouse, 51 rue du jardin Zoologique, 68100 Mulhouse, France
| | - Thibaut Prenant
- Clinique vétérinaire du Coq à l'Ane, 24 Boulevard du Commandant René Mouchotte, 64320 Bizanos, France - Ecole nationale vétérinaire d'Alfort, Biopôle Alfort, Parasitology-Mycology, 94704 Maisons-Alfort, France
| | - Bruno Polack
- Ecole nationale vétérinaire d'Alfort, Biopôle Alfort, Parasitology-Mycology, 94704 Maisons-Alfort, France
| | - Jacques Guillot
- Ecole nationale vétérinaire d'Alfort, Biopôle Alfort, Parasitology-Mycology, 94704 Maisons-Alfort, France - Oniris, Dermatology-Parasitology-Mycology, 44300 Nantes, France - IRF Research Group, SFR ICAT, University of Angers, 4 rue de Larrey, 49933 Angers, France
| | - Benoît Quintard
- Parc Zoologique et Botanique de Mulhouse, 51 rue du jardin Zoologique, 68100 Mulhouse, France
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Zanzani SA, Villa L, Gazzonis AL, Cartagena D, Mortarino M, Bonacina E, Guadagnini D, Allievi C, Manfredi MT. The Prophylactic Effect of Ivermectin Treatments on Nematode Infections of Mammals in a Faunistic Park (Northern Italy). Animals (Basel) 2022; 12:ani12091124. [PMID: 35565548 PMCID: PMC9099513 DOI: 10.3390/ani12091124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 04/25/2022] [Accepted: 04/26/2022] [Indexed: 11/16/2022] Open
Abstract
Nematode infections of mammals can spread in zoos and faunistic parks and lead to disease in humans and animals. Group treatment strategies with anthelminthic drugs are common. Still, their effectiveness should be verified by sensitive and specific copromicroscopic analyses. This study assessed longitudinal parasitological monitoring, by FLOTAC® dual technique, in mammals housed in an Italian faunistic park, in order to verify the effectiveness of the two adopted ivermectin prophylactic treatments. Twenty-one species of herbivorous mammals from ten families were treated twice per year with ivermectin in an in-feed formulation (medicated feed containing 1.7 g/ton ivermectin daily, for 30 days in March and November), while 13 species of carnivores and primates from five families were treated once a month with oral or subcutaneous administrations of ivermectin (200 μg/kg body weight (b.w.), from March to November). Fecal samples were collected in June–July and October 2019 (late spring–early summer and autumn sampling groups, respectively). All nematode infections, sustained by Nematodirus spp., Capillaria spp., Trichuris spp., Parascaris spp. and Strongylida, were detected in samples collected from herbivores, presenting prevalence rates of infection of 17.3% (9/52), 15.4% (8/52), 15.4% (8/52), 5.8% (3/52), and 3.8% (2/52), respectively. All carnivores and primates tested negative. The general linear mixed model showed that nematode eggs’ excretion in herbivores were influenced by sampling and sampling-host family interaction. Results showed that frequency and dose of prophylactic treatments in herbivores should be improved according to host and parasite taxonomic groups. The treatment adopted in carnivores and primates, together with hygienic management, was effective in nematode control.
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Affiliation(s)
- Sergio A. Zanzani
- Department of Veterinary Medicine and Animal Sciences, Università Degli Studi di Milano, Via Dell’ Università 6, 26900 Lodi, Italy; (L.V.); (A.L.G.); (M.M.); (C.A.); (M.T.M.)
- Correspondence: ; Tel.: +39-02-5033-4536
| | - Luca Villa
- Department of Veterinary Medicine and Animal Sciences, Università Degli Studi di Milano, Via Dell’ Università 6, 26900 Lodi, Italy; (L.V.); (A.L.G.); (M.M.); (C.A.); (M.T.M.)
| | - Alessia L. Gazzonis
- Department of Veterinary Medicine and Animal Sciences, Università Degli Studi di Milano, Via Dell’ Università 6, 26900 Lodi, Italy; (L.V.); (A.L.G.); (M.M.); (C.A.); (M.T.M.)
| | - Daniel Cartagena
- “Le Cornelle” Faunistic Park, Via Cornelle 16, 24030 Valbrembo, Italy; (D.C.); (E.B.); (D.G.)
| | - Michele Mortarino
- Department of Veterinary Medicine and Animal Sciences, Università Degli Studi di Milano, Via Dell’ Università 6, 26900 Lodi, Italy; (L.V.); (A.L.G.); (M.M.); (C.A.); (M.T.M.)
| | - Eleonora Bonacina
- “Le Cornelle” Faunistic Park, Via Cornelle 16, 24030 Valbrembo, Italy; (D.C.); (E.B.); (D.G.)
| | - Davide Guadagnini
- “Le Cornelle” Faunistic Park, Via Cornelle 16, 24030 Valbrembo, Italy; (D.C.); (E.B.); (D.G.)
| | - Carolina Allievi
- Department of Veterinary Medicine and Animal Sciences, Università Degli Studi di Milano, Via Dell’ Università 6, 26900 Lodi, Italy; (L.V.); (A.L.G.); (M.M.); (C.A.); (M.T.M.)
| | - Maria Teresa Manfredi
- Department of Veterinary Medicine and Animal Sciences, Università Degli Studi di Milano, Via Dell’ Università 6, 26900 Lodi, Italy; (L.V.); (A.L.G.); (M.M.); (C.A.); (M.T.M.)
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Are Anthelminthic Treatments of Captive Ruminants Necessary? Vet Sci 2021; 8:vetsci8100240. [PMID: 34679070 PMCID: PMC8538610 DOI: 10.3390/vetsci8100240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2021] [Revised: 10/08/2021] [Accepted: 10/14/2021] [Indexed: 11/29/2022] Open
Abstract
Anthelmintics are frequently administered to animals to limit fecal egg elimination, so that wild animals in captive breeding programs are treated to maintain a proper health condition. This is effective from a health management perspective, but on the other hand, it could prevent captive animals from developing an effective immunity against parasites that they might encounter when reintroduced into their original geographic areas. The aim of this study was to describe the dynamics of parasite infections in captive Cuvier’s gazelles (Gazella cuvieri) not treated with anthelmintics for two years and to evaluate the factors related to their fecal egg shedding. Fifteen one-year-old males were enclosed together and captured monthly to collect feces directly from the rectum. Fecal egg counts were performed, and eggs were classified as strongylid-like, Nematodirus sp., or Trichuris sp. Fecal egg shedding for the three groups of parasites did not vary significantly over the duration of the study. Only precipitation affected the egg-shedding pattern of all parasites, while inbreeding was positively associated with the number of strongylid-like parasites. These findings suggest an equilibrium between hosts and parasites in absence of treatment during the study. The anthelmintic treatment as a systematic prophylaxis method in captive animals should be avoided and replaced by systematic coprological and clinical vigilance, as well as targeted treatment in the case of a significant rise of fecal egg counts.
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Safety, Pharmacokinetics, and Activity of High-Dose Ivermectin and Chloroquine against the Liver Stage of Plasmodium cynomolgi Infection in Rhesus Macaques. Antimicrob Agents Chemother 2020; 64:AAC.00741-20. [PMID: 32660993 PMCID: PMC7449176 DOI: 10.1128/aac.00741-20] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2020] [Accepted: 06/30/2020] [Indexed: 12/11/2022] Open
Abstract
Previously, ivermectin (1 to 10 mg/kg of body weight) was shown to inhibit the liver-stage development of Plasmodium berghei in orally dosed mice. Here, ivermectin showed inhibition of the in vitro development of Plasmodium cynomolgi schizonts (50% inhibitory concentration [IC50], 10.42 μM) and hypnozoites (IC50, 29.24 μM) in primary macaque hepatocytes when administered as a high dose prophylactically but not when administered in radical cure mode. Previously, ivermectin (1 to 10 mg/kg of body weight) was shown to inhibit the liver-stage development of Plasmodium berghei in orally dosed mice. Here, ivermectin showed inhibition of the in vitro development of Plasmodium cynomolgi schizonts (50% inhibitory concentration [IC50], 10.42 μM) and hypnozoites (IC50, 29.24 μM) in primary macaque hepatocytes when administered as a high dose prophylactically but not when administered in radical cure mode. The safety, pharmacokinetics, and efficacy of oral ivermectin (0.3, 0.6, and 1.2 mg/kg) with and without chloroquine (10 mg/kg) administered for 7 consecutive days were evaluated for prophylaxis or radical cure of P. cynomolgi liver stages in rhesus macaques. No inhibition or delay to blood-stage P. cynomolgi parasitemia was observed at any ivermectin dose (0.3, 0.6, and 1.2 mg/kg). Ivermectin (0.6 and 1.2 mg/kg) and chloroquine (10 mg/kg) in combination were well-tolerated with no adverse events and no significant pharmacokinetic drug-drug interactions observed. Repeated daily ivermectin administration for 7 days did not inhibit ivermectin bioavailability. It was recently demonstrated that both ivermectin and chloroquine inhibit replication of the novel severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) in vitro. Further ivermectin and chloroquine trials in humans are warranted to evaluate their role in Plasmodium vivax control and as adjunctive therapies against COVID-19 infections.
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