1
|
Becker SD, Hughes DM. Patient weight has diverse effects on the prescribing of different antibiotics to dogs. Front Vet Sci 2024; 11:1358535. [PMID: 38440386 PMCID: PMC10910008 DOI: 10.3389/fvets.2024.1358535] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Accepted: 02/07/2024] [Indexed: 03/06/2024] Open
Abstract
Introduction Various factors including body weight-associated treatment cost may influence the probability of dispensing antibiotics to dogs in first-opinion practice, but their effect on specific drug choice remains unclear. Methods Multiple membership regression modeling was used to investigate the probability of dispensing 12 different antibiotics to dogs of different weights in the context of various disease presentations, using anonymized data obtained from electronic health records of 18 clinics between 2020 and 2022. Data from 14,259 dogs were analyzed. Results Treatment choice varied significantly with animal weight. Higher body weight was associated with an increased likelihood of dispensing lower cost antimicrobials such as amoxicillin and trimethoprim sulfonamide, while use of higher cost antimicrobials such as cefovecin was strongly biased to smaller animals. However, these effects were limited when restricted treatment options were available for the target condition. Conclusion This work demonstrates that anticipated financial costs may result in different treatment choices for canine patients depending on their body weight. Further work is needed to understand the impact of financial pressures on veterinarians' treatment choices, and the implications for the optimization of antimicrobial stewardship in first opinion practice.
Collapse
Affiliation(s)
- Stuart D. Becker
- Department of Health Data Science, Institute of Population Health, University of Liverpool, Liverpool, United Kingdom
- Pathobiology and Population Sciences, The Royal Veterinary College, Hertfordshire, United Kingdom
| | - David M. Hughes
- Department of Health Data Science, Institute of Population Health, University of Liverpool, Liverpool, United Kingdom
| |
Collapse
|
2
|
Barrera JP, Montoya A, Marino V, Sarquis J, Checa R, Miró G. Cystoisospora spp. infection at a dog breeding facility in the Madrid region: Infection rate and clinical management based on toltrazuril metaphylaxis. Vet Parasitol Reg Stud Reports 2024; 48:100971. [PMID: 38316499 DOI: 10.1016/j.vprsr.2023.100971] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 10/11/2023] [Accepted: 12/05/2023] [Indexed: 02/07/2024]
Abstract
Canine coccidiosis caused by Cystoisospora canis and Cystoisospora ohioensis-complex is common in kennels. While often underestimated, coccidiosis may cause severe clinical signs in puppies and sometimes even lead to death, so preventative measures are important. This study examines Cystoisospora spp. infection at a Labrador retriever breeding facility in Madrid, Spain. To identify environmental factors associated with infection, dams were examined throughout a reproductive cycle (from oestrus to 60 days postpartum) and their puppies during their first 60 days of life. Also assessed was the efficacy of combined treatment with emodepside (0.9 mg/ml) and toltrazuril (18 mg/ml) at a dose of 0.5 ml/kg of weight, equivalent to 0.45 mg/kg and 9 mg/kg, respectively, in puppies on day 35 of life. Oocyst shedding was detected in 4.6-18.6% of 45 dams examined and in 2.2-9.1% of their litters (315 puppies). In both cases, peak opg elimination was recorded on day 30 postpartum/of life. The species of Cystoisospora detected were C. canis (91.3%) and C. ohioensis-complex (8.7%). While in both dams and puppies opg counts were higher in autumn when rainfall was at its highest, correlation between opg and rainfall emerged as significant only in puppies (p = 0.031). The treatment of 35 day-old puppies with toltrazuril was 100% effective in controlling this infection in the kennel. Our findings therefore suggest the need for a strict hygiene regime and the use of toltrazuril as blanket treatment to reduce Cystoisospora transmission in dog breeding facilities.
Collapse
Affiliation(s)
- Juan P Barrera
- Department of Animal Health, Veterinary Faculty, Universidad Complutense de Madrid, Spain.
| | - Ana Montoya
- Department of Animal Health, Veterinary Faculty, Universidad Complutense de Madrid, Spain.
| | - Valentina Marino
- Department of Animal Health, Veterinary Faculty, Universidad Complutense de Madrid, Spain.
| | - Juliana Sarquis
- Department of Animal Health, Veterinary Faculty, Universidad Complutense de Madrid, Spain.
| | - Rocío Checa
- Department of Animal Health, Veterinary Faculty, Universidad Complutense de Madrid, Spain.
| | - Guadalupe Miró
- Department of Animal Health, Veterinary Faculty, Universidad Complutense de Madrid, Spain.
| |
Collapse
|
3
|
Yuan Y, Yang L, Zhao Q, Xiong L, Yang M, Suo X, Hao Z. Ponazuril: Clinical efficacy, ultrastructure, and histopathology studies of in vivo anticoccidial action against Eimeria tenella. Vet Parasitol 2024; 326:110098. [PMID: 38194736 DOI: 10.1016/j.vetpar.2023.110098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2023] [Revised: 12/14/2023] [Accepted: 12/14/2023] [Indexed: 01/11/2024]
Abstract
Ponazuril, a novel antiprotozoal drug in the class of triazine, has shown a promising application on apicomplexan infections in poultry and livestock. However, the effect and mechanism of action of ponazuril against Eimeria tenella (E. tenella) are unclear. The efficacy against E. tenella was initially studied by administering different doses of ponazuril in drinking water. The treated stage and site of ponazuril on E. tenella were observed through ultrastructural and histopathological analyses. Chicks were orally treated with a dose of 15 mg/kg body weight of ponazuril at different endogenous stages of E. tenella post-infection. According to the clinical study, the values of anticoccidial indices (ACI) were 157.0, 162.3, 196.9, 194.5, and 190.9, respectively, when the ponazuril was administered in drinking water at doses of 5, 10, 20, 40, and 50 mg/L for two consecutive days after infection. Among them, the 20 mg/L ponazuril group showed the best anticoccidial effect, which was superior to that of the toltrazuril treatment group, with an ACI value of 191.7. Histological analysis indicated that ponazuril effectively relieved cecal lesions, and decreased the number of merozoites. Transmission electron micrographs (TEM) observed that merozoites became irregular in shape, and some apparent protrusions of the outer membrane were presented especially the second-generation merozoites. Additionally, abnormalities in the development of WFBI and WFBII in the macrogametocyte were observed, which may affect the formation of the ovule wall. Moreover, merozoites in the treated group showed uneven and marginalized chromatin and mitochondrial swelling. These results suggested ponazuril is a potential anticoccidial drug, providing information on the mechanism of anticoccidial effects.
Collapse
Affiliation(s)
- Yanyang Yuan
- College of Veterinary Medicine, China Agricultural University, Beijing 100094, PR China; National key Laboratory of Veterinary Public Health Security, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China; Key Biology Laboratory of Chinese Veterinary Medicine, Ministry of Agriculture and Rural Affairs, Beijing 100193, PR China; National Center of Technology Innovation for Medicinal function of Food, National Food and Strategic Reserves Administration, Beijing 100193, PR China
| | - Li'nan Yang
- College of Veterinary Medicine, China Agricultural University, Beijing 100094, PR China
| | - Qingyu Zhao
- College of Veterinary Medicine, China Agricultural University, Beijing 100094, PR China; National key Laboratory of Veterinary Public Health Security, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China; Key Biology Laboratory of Chinese Veterinary Medicine, Ministry of Agriculture and Rural Affairs, Beijing 100193, PR China; National Center of Technology Innovation for Medicinal function of Food, National Food and Strategic Reserves Administration, Beijing 100193, PR China
| | - Lei Xiong
- College of Veterinary Medicine, China Agricultural University, Beijing 100094, PR China
| | - Ming Yang
- National key Laboratory of Veterinary Public Health Security, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China; Key Biology Laboratory of Chinese Veterinary Medicine, Ministry of Agriculture and Rural Affairs, Beijing 100193, PR China; National Center of Technology Innovation for Medicinal function of Food, National Food and Strategic Reserves Administration, Beijing 100193, PR China; College of Veterinary Medicine, Xinjiang Agricultural University, Wulumuqi 830052, PR China
| | - Xun Suo
- College of Veterinary Medicine, China Agricultural University, Beijing 100094, PR China
| | - Zhihui Hao
- College of Veterinary Medicine, China Agricultural University, Beijing 100094, PR China; National key Laboratory of Veterinary Public Health Security, College of Veterinary Medicine, China Agricultural University, Beijing 100193, China; Key Biology Laboratory of Chinese Veterinary Medicine, Ministry of Agriculture and Rural Affairs, Beijing 100193, PR China; National Center of Technology Innovation for Medicinal function of Food, National Food and Strategic Reserves Administration, Beijing 100193, PR China.
| |
Collapse
|
4
|
Zhang Y, Qin Z, Zhang K, Lang J, Wang N, Niu Y, Zhang L. Morphological and molecular biology identification of Cystoisospora sp. in the blue fox, Alopex lagopus (Linnaeus, 1758). Parasitol Res 2023; 123:35. [PMID: 38086981 DOI: 10.1007/s00436-023-08044-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2023] [Accepted: 11/03/2023] [Indexed: 12/18/2023]
Abstract
To investigate the prevalence and molecular characteristics of Cystoisospora sp. in blue fox (Alopex lagopus), Sheather's sugar floatation method was conducted to detect coccidia in 423 fresh fecal samples randomly collected from blue fox farms from three cities in China. The overall prevalence of coccidia was 1.4% (6/423), and three Cystoisospora sp. (Cystoisospora fennechi, Cystoisospora sp. I and Cystoisospora vulpina) were identified by their morphological characteristics. The 18S ribosomal RNA (rRNA) and cytochrome c oxidase subunit I (COI) locus sequences were sequenced for molecular biological identification, homology comparison, and phylogenetic analysis of Cystoisospora sp. by single-oocyst selection technology and multi-locus-nested PCR amplification. At the 18S rRNA and COI loci, C. vulpina had 99.48% and 99.59% homology, respectively, with Cystoisospora canis and Cystoisospora ohioensis from canines. Phylogenetic analysis indicated that C. vulpina was clustered in a clade with Cystoisospora sp. from Canidae, which the relatives are consistent with the hosts. To our knowledge, this is the first report on molecular identification and evolutionary analysis of C. vulpina at two different loci.
Collapse
Affiliation(s)
- Yifan Zhang
- College of Veterinary Medicine, Henan Agricultural University, No. 15 Longzihu University Area, Zhengdong New District, Zhengzhou, 450046, People's Republic of China
- International Joint Research Laboratory for Zoonotic Diseases of Henan, Zhengzhou, 450002, Henan Province, China
| | - Ziyang Qin
- College of Veterinary Medicine, Henan Agricultural University, No. 15 Longzihu University Area, Zhengdong New District, Zhengzhou, 450046, People's Republic of China
- International Joint Research Laboratory for Zoonotic Diseases of Henan, Zhengzhou, 450002, Henan Province, China
| | - Kaihui Zhang
- College of Veterinary Medicine, Henan Agricultural University, No. 15 Longzihu University Area, Zhengdong New District, Zhengzhou, 450046, People's Republic of China
- International Joint Research Laboratory for Zoonotic Diseases of Henan, Zhengzhou, 450002, Henan Province, China
| | - Jiashu Lang
- College of Veterinary Medicine, Henan Agricultural University, No. 15 Longzihu University Area, Zhengdong New District, Zhengzhou, 450046, People's Republic of China
- International Joint Research Laboratory for Zoonotic Diseases of Henan, Zhengzhou, 450002, Henan Province, China
| | - Nanhao Wang
- College of Veterinary Medicine, Henan Agricultural University, No. 15 Longzihu University Area, Zhengdong New District, Zhengzhou, 450046, People's Republic of China
- International Joint Research Laboratory for Zoonotic Diseases of Henan, Zhengzhou, 450002, Henan Province, China
| | - Yixuan Niu
- College of Veterinary Medicine, Henan Agricultural University, No. 15 Longzihu University Area, Zhengdong New District, Zhengzhou, 450046, People's Republic of China
- International Joint Research Laboratory for Zoonotic Diseases of Henan, Zhengzhou, 450002, Henan Province, China
| | - Longxian Zhang
- College of Veterinary Medicine, Henan Agricultural University, No. 15 Longzihu University Area, Zhengdong New District, Zhengzhou, 450046, People's Republic of China.
- International Joint Research Laboratory for Zoonotic Diseases of Henan, Zhengzhou, 450002, Henan Province, China.
| |
Collapse
|
5
|
Mateo M, Montoya A, Bailo B, Köster PC, Dashti A, Hernández‐Castro C, Saugar JM, Matas P, Xiao L, Carmena D. Prevalence and public health relevance of enteric parasites in domestic dogs and cats in the region of Madrid (Spain) with an emphasis on Giardia duodenalis and Cryptosporidium sp. Vet Med Sci 2023; 9:2542-2558. [PMID: 37725371 PMCID: PMC10650246 DOI: 10.1002/vms3.1270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 08/21/2023] [Accepted: 09/05/2023] [Indexed: 09/21/2023] Open
Abstract
BACKGROUND Pet dogs and cats exert an unquestionable beneficial effect in the well-being of their owners, but can also act as a source of zoonotic infections if improperly cared. OBJECTIVES We investigated the occurrence, risk factors, genetic variability and zoonotic potential of intestinal parasites in dogs and cats attended in a clinical veterinary setting in Spain. METHODS Canine (n = 252) and feline (n = 35) faecal samples were collected during 2017-2019 and analysed by coproparasitological methods. A rapid lateral immunochromatographic test (ICT) was used for detecting Giardia duodenalis and Cryptosporidium sp. Samples positive at microscopy examination and/or ICT were reassessed by molecular methods. RESULTS Overall, 48.8% (123/252) of dogs and 48.6% (17/35) of cats were infected by enteric parasites. In dogs, G. duodenalis was the most prevalent species (40.9%), followed by Cystoisospora sp. (7.1%), and Toxocara canis (5.2%). In cats, Joyeuxiella sp. and Toxocara cati were the dominant species (20.0% each), followed by G. duodenalis (14.3%), D. caninum (5.7%) and Cystoisospora felis and Toxascaris leonina (2.9% each). Pups and kittens were more likely to harbour intestinal parasites and develop clinical signs. Sequence analyses of dog isolates revealed the presence of assemblages A (n = 1), C (n = 4), D (n = 4) and C+D (n = 1) within G. duodenalis; C. parvum (n = 1) and C. canis (n = 4) within Cryptosporidium and PtEb IX (n = 1) in Enterocytozoon bieneusi. A novel C. canis subtype family, named XXi, is reported. CONCLUSIONS Our results highlight that (i) well-cared dogs carry zoonotic enteric protozoan parasites of public health relevance, (ii) proper hygiene practices and routine veterinary treatment are essential to prevent zoonotic infections, (iii) vulnerable populations should avoid contact with pups/kittens with diarrhoea and (iv) infected dogs might be major contributors to the environmental contamination with soil-transmitted helminths (STHs) eggs.
Collapse
Affiliation(s)
- Marta Mateo
- Department of Microbiology and ParasitologyFaculty of PharmacyComplutense University of MadridMadridSpain
| | - Ana Montoya
- Department of Animal HealthFaculty of VeterinaryComplutense University of MadridMadridSpain
| | - Begoña Bailo
- Parasitology Reference and Research LaboratorySpanish National Centre for MicrobiologyHealth Institute Carlos IIIMajadahondaMadridSpain
| | - Pamela C. Köster
- Parasitology Reference and Research LaboratorySpanish National Centre for MicrobiologyHealth Institute Carlos IIIMajadahondaMadridSpain
| | - Alejandro Dashti
- Parasitology Reference and Research LaboratorySpanish National Centre for MicrobiologyHealth Institute Carlos IIIMajadahondaMadridSpain
| | - Carolina Hernández‐Castro
- Parasitology Reference and Research LaboratorySpanish National Centre for MicrobiologyHealth Institute Carlos IIIMajadahondaMadridSpain
- Parasitology Group, Faculty of Medicine, Academic Corporation for the Study of Tropical PathologiesUniversity of AntioquiaMedellínColombia
| | - José M. Saugar
- Parasitology Reference and Research LaboratorySpanish National Centre for MicrobiologyHealth Institute Carlos IIIMajadahondaMadridSpain
- Centre for Biomedical Research Network (CIBER) in Infectious DiseasesHealth Institute Carlos IIIMadridSpain
| | - Pablo Matas
- Faculty of Veterinary, Alfonso X El Sabio University (UAX)Villanueva de la CañadaMadridSpain
| | - Lihua Xiao
- College of Veterinary MedicineSouth China Agricultural UniversityGuangzhouChina
| | - David Carmena
- Parasitology Reference and Research LaboratorySpanish National Centre for MicrobiologyHealth Institute Carlos IIIMajadahondaMadridSpain
- Centre for Biomedical Research Network (CIBER) in Infectious DiseasesHealth Institute Carlos IIIMadridSpain
| |
Collapse
|
6
|
Gastrointestinal Parasites of Dogs in Egypt: An Update on the Prevalence in Dakahlia Governorate and a Meta-Analysis for the Published Data from the Country. Animals (Basel) 2023; 13:ani13030496. [PMID: 36766385 PMCID: PMC9913534 DOI: 10.3390/ani13030496] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Revised: 01/14/2023] [Accepted: 01/16/2023] [Indexed: 02/04/2023] Open
Abstract
Since the last survey on gastrointestinal (GIT) parasites infecting dogs in Dakahlia governorate, Egypt, was published 40 years ago, the present study detected various GIT parasites in feces of 78 stray dogs in this governorate. Twenty-one dogs (35.9%) had eggs/oocysts of eight different parasites including Toxocara canis (19.2%), Toxascaris leonina (2.6%), hookworms (1.3%), Taenia species (5.1%), Dipylidium caninum (2.6%), Cystoisospora canis (5.1%), Cystoisospora ohioensis (2.6%), and Neospora caninum-like oocysts (1.3%). These results were combined in various meta-analyses with findings of all published surveys on GIT parasites of dogs in Egypt to underline the potential parasitic zoonoses from dogs in the country. Feces and/or gastrointestinal tracts of 19,807 dogs from various Egyptian governorates, but particularly Cairo, have been microscopically tested in 182 datasets published between 1938 and 2022, revealed during our systematic database search. Toxocara canis, interestingly, displayed a twofold higher pooled prevalence (24.7%) when compared to the published global pooled prevalence for T. canis, indicating that dogs represent a major risk for toxocariasis in humans from Egypt. Dipylidium caninum (25.4%) as well as various Taenia species (17.1%) also displayed high pooled prevalences. On the contrary, lower pooled prevalence was estimated for the most important zoonotic taeniid "Echinococcus granulosus" (2.4%) as well as for hookworms (1.8%) in comparison to what has been published from other countries in the region. Relatively high prevalences were estimated for three protozoa detected in dogs and are common to infect children in Egypt; Cryptosporidium (5.5%), Giardia (7.4%), and Entamoeba histolytica (9.8%). In general, the pooled prevalence estimated for various parasites detected in dogs from Egypt has decreased in the recent years, sometimes by as much as one-fifth, but this great decline is statistically insignificant, which should alert the veterinary and public health authorities to continue their efforts for controlling these parasites in a "One Health" approach.
Collapse
|
7
|
Cociancic P, Deferrari G, Zonta ML, Navone GT. Intestinal parasites in canine feces contaminating urban and recreational areas in Ushuaia (Argentina). VETERINARY PARASITOLOGY- REGIONAL STUDIES AND REPORTS 2020; 21:100424. [PMID: 32862914 DOI: 10.1016/j.vprsr.2020.100424] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 06/12/2020] [Accepted: 06/14/2020] [Indexed: 10/24/2022]
Abstract
Wild and domestic dogs are important reservoir hosts of numerous intestinal parasites that represent potential infection sources for both humans and wild or other domestic animals. The aim of this study was to determine the presence, diversity, and contamination potential of intestinal parasites in dog feces contaminating urban and recreational areas in Ushuaia (Tierra del Fuego province, Argentina). A total of 80 canine fecal samples were collected from urban (playgrounds, streets, sidewalks, squares and coastal walks) and recreational areas (winter centers for raising and training sled dogs) in 2018. Samples were preserved in 5% formalin and processed using formalin-ethyl acetate sedimentation and FLOTAC dual Pellet techniques. Data were analyzed using the R software. At least one parasite species was recovered in 32.5% of the total samples examined. Of the seven parasite species detected, infection by protozoan species was higher than helminth infections (28.8% versus 8.8%). Sarcocystis sp. (20.0%), Giardia sp. (8.8%) and Cystoisospora spp. (7.5%) were the most frequent species, followed by Toxocara canis (5.0%), Echinococcus spp./Taenia spp. (2.5%), Trichuris vulpis and Uncinaria sp. (1.3% for both). Single infections (69.2%) were more frequent than coinfections with two (19.2%) and three parasite species (11.5%). This study provides the first description of the diversity and frequency of intestinal parasite species in dog feces from Ushuaia, the southernmost city in the world. The unfavorable environment of Ushuaia, characterized by low temperatures and winter snowfall, is likely to reduce parasite survivability, decreasing contamination potential. Some parasite species found are potentially zoonotic and represent an important risk for the human population and a source of infection to free-roaming pets. The results of this study revealed the need to strengthen the prevention, surveillance and control of these infections in pets, as well as to implement programs for public health education, control measures for the free-roaming canine population, and responsible pet ownership in the study area.
Collapse
Affiliation(s)
- Paola Cociancic
- Centro de Estudios Parasitológicos y de Vectores (CEPAVE-CONICET-UNLP-asociado a CICPBA), La Plata, Buenos Aires, Argentina.
| | - Guillermo Deferrari
- Centro Austral de Investigaciones Científicas (CADIC-CONICET), Ushuaia, Tierra del Fuego, Argentina
| | - María Lorena Zonta
- Centro de Estudios Parasitológicos y de Vectores (CEPAVE-CONICET-UNLP-asociado a CICPBA), La Plata, Buenos Aires, Argentina
| | - Graciela Teresa Navone
- Centro de Estudios Parasitológicos y de Vectores (CEPAVE-CONICET-UNLP-asociado a CICPBA), La Plata, Buenos Aires, Argentina
| |
Collapse
|
8
|
Frada M, Machado J, Coutinho T, Lopes AP, Ginja MMD. Growth stunted in half a litter of puppies due to intestinal parasitism. VETERINARY RECORD CASE REPORTS 2020. [DOI: 10.1136/vetreccr-2019-000939] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- Maria Frada
- Veterinary Teaching HospitalUniversity of Trás‐os‐Montes and Alto Douro (UTAD)Vila RealPortugal
| | - João Machado
- Veterinary Teaching HospitalUniversity of Trás‐os‐Montes and Alto Douro (UTAD)Vila RealPortugal
| | - Teresa Coutinho
- Department of Veterinary SciencesSchool of Agrarian and Veterinary SciencesUTADVila RealPortugal
| | - Ana Patrícia Lopes
- Department of Veterinary SciencesSchool of Agrarian and Veterinary SciencesUTADVila RealPortugal
- Veterinary and Animal Research Centre (CECAV)UTADVila RealPortugal
| | - Mario M D Ginja
- Veterinary Teaching HospitalUniversity of Trás‐os‐Montes and Alto Douro (UTAD)Vila RealPortugal
- Department of Veterinary SciencesSchool of Agrarian and Veterinary SciencesUTADVila RealPortugal
- Centre for the Research and Technology of Agro‐Environmental and Biological Sciences (CITAB)UTADVila RealPortugal
| |
Collapse
|
9
|
Sazmand A, Nourian A. Incorrect reports of Eimeria spp. from dogs-Veterinary and medical parasitologists should work closer. Comp Immunol Microbiol Infect Dis 2020; 69:101420. [PMID: 31926356 DOI: 10.1016/j.cimid.2020.101420] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2020] [Accepted: 01/06/2020] [Indexed: 11/15/2022]
Affiliation(s)
- Alireza Sazmand
- Department of Pathobiology, Faculty of Veterinary Science, Bu-Ali Sina University, Hamedan, Iran.
| | - Alireza Nourian
- Department of Pathobiology, Faculty of Veterinary Science, Bu-Ali Sina University, Hamedan, Iran
| |
Collapse
|
10
|
Endogenous development of Cystoisospora belli in intestinal and biliary epithelium of humans. Parasitology 2019; 146:865-872. [DOI: 10.1017/s003118201900012x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
AbstractCystoisospora(Isospora)belliis a coccidian parasite of humans. It can cause serious digestive disorders involving infection of intestines, biliary tract and gallbladder, especially in those with depressed immunity. It has a direct fecal–oral transmission cycle. After ingestion of sporulated oocysts, the parasite multiplies asexually and sexually within host epithelial cells, resulting in unsporulated oocysts that are excreted in feces. The details of asexual and sexual stages are not known and certain inclusions in epithelial cells in biopsy samples have been erroneously identified recently asC. belli. Here, we provide details of developmental stages ofC. belliin two patients, in duodenal biopsy of one and biliary epithelium of the other. Immature and mature asexual stages (schizonts/meronts) were seen in epithelial cells. The merozoites were seen singly, in pairs and in groups in single parasitophorous vacuole (pv) in host cytoplasm. Immature and mature meronts were seen together in the same pv; up to eight nuclei were seen in meronts that retained elongated crescent shape; round multinucleated schizonts, seen in other coccidians, were not found. Meronts were up to 25µm long and contained up to ten merozoites that were 8–11µm long. The merozoites and meronts contained PAS-positive granules. Microgamonts (male) contained up to 30 nuclei that were arranged at the periphery and had condensed chromatin; 1–3 PAS-positive, eosinophilic, residual bodies were left when microgametes were formed. The microgametes were 4µm long and PAS-negative. All stages of macrogamonts, including oocysts were PAS-positive. The detailed description of the life cycle stages ofC. bellireported here should facilitate in histopathologic diagnosis of this parasite.
Collapse
|
11
|
Re-evaluation of merogony of a Cystoisospora ohioensis-like coccidian and its distinction from gametogony in the intestine of a naturally infected dog. Parasitology 2019; 146:740-745. [PMID: 30724151 DOI: 10.1017/s0031182018002202] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Four species of Cystoisospora, C. canis, C. ohioensis, C. neorivolta and C. burrowsi are described from feces of dogs. Of these, the oocysts of C. canis are the largest and easily distinguished from the remaining three species. Oocysts of C. ohioensis, C. neorivolta and C. burrowsi are difficult to distinguish because of overlap in their sizes. However, based on endogenous developmental stages, C. ohioensis is distinct from C. neorivolta and C. burrowsi because its endogenous stages are confined to surface epithelium of intestine whereas endogenous stages of C. neorivolta and C. burrowsi are predominantly in the lamina propria. There are uncertainties regarding the endogenous stages of C. neorivolta and C. burrowsi and there is no way now to determine whether C. burrowsi and C. neorivolta are different parasites; therefore, these are referred as C. ohioensis-like organisms. Additionally, mode of division of asexual stages of coccidia of dogs is largely unknown and ultrastructural studies are lacking. In the present study, development of asexual and sexual stages of a C. ohioensis-like organism in a naturally infected dog is described by light microscopy and by transmission electron microscopy. Merozoites divided by endodyogeny/merogony. Meronts were crescent/merozoite-shaped and contained a maximum of eight nuclei. A distinctive feature of merozoites was the presence of many PAS-positive amylopectin granules that were absent or rare in immature microgamonts making it possible to distinguish them.
Collapse
|