scholarly journals Diagnostic Challenges in Canine Parvovirus 2c in Vaccine Failure Cases

Viruses ◽  
2020 ◽  
Vol 12 (9) ◽  
pp. 980 ◽  
Author(s):  
Hiu Ying Esther Yip ◽  
Anne Peaston ◽  
Lucy Woolford ◽  
Shiow Jing Khuu ◽  
Georgia Wallace ◽  
...  
Keyword(s):  
Diagnostic Tests ◽  
Clinical Signs ◽  
Canine Parvovirus ◽  
Vaccination Status ◽  
Negative Results ◽  
Faecal Samples ◽  
Healthy Dogs ◽  
Antigen Tests ◽  
Low Sensitivity ◽  
Apparently Healthy

In this study, three different diagnostic tests for parvovirus were compared with vaccination status and parvovirus genotype in suspected canine parvovirus cases. Faecal samples from vaccinated (N17) and unvaccinated or unknown vaccination status (N41) dogs that had clinical signs of parvovirus infection were tested using three different assays of antigen tests, conventional and quantitative PCR tests. The genotype of each sample was determined by sequencing. In addition to the suspected parvovirus samples, 21 faecal samples from apparently healthy dogs were tested in three diagnostic tests to evaluate the sensitivity and specificity of the tests. The antigen test was positive in 41.2% of vaccinated dogs and 73.2% of unvaccinated diseased dogs. Conventional PCR and qPCR were positive for canine parvovirus (CPV) in 82.4% of vaccinated dogs and 92.7% of unvaccinated dogs. CPV type-2c (CPV-2c) was detected in 82.75% of dogs (12 vaccinated and 36 unvaccinated dogs), CPV-2b was detected in 5.17% dogs (one vaccinated and two unvaccinated) and CPV-2a in 1.72% vaccinated dog. Mean Ct values in qPCR for vaccinated dogs were higher than the unvaccinated dogs (p = 0.049), suggesting that vaccinated dogs shed less virus, even in clinical forms of CPV. CPV-2c was the dominant subtype infecting dogs in both vaccinated and unvaccinated cases. Faecal antigen testing failed to identify a substantial proportion of CPV-2c infected dogs, likely due to low sensitivity. The faecal samples from apparently healthy dogs (n = 21) showed negative results in all three tests. Negative CPV faecal antigen results should be viewed with caution until they are confirmed by molecular methods.

scholarly journals Highly Variable Clinical Pictures in Dogs Naturally Infected with Angiostrongylus vasorum

Pathogens ◽  
2021 ◽  
Vol 10 (11) ◽  
pp. 1372
Author(s):  
Mariasole Colombo ◽  
Donato Traversa ◽  
Eleonora Grillotti ◽  
Carlo Pezzuto ◽  
Cesare De Tommaso ◽  
...  
Keyword(s):  
Southern Italy ◽  
Clinical Signs ◽  
Sudden Onset ◽  
High Variability ◽  
Angiostrongylus Vasorum ◽  
Coagulation Disorders ◽  
Life Threatening ◽  
Healthy Dogs ◽  
Clinical Pictures ◽  
Apparently Healthy

Canine angiostrongylosis by Angiostrongylus vasorum is increasingly reported in both enzootic and previously free areas. The complex pathogenesis of the disease makes the clinical workup challenging. Infected dogs show highly variable clinical pictures, characterized by subclinical to life-threatening general, cardio-respiratory, neurological and/or gastrointestinal signs. The present study reports the high variability of clinical pictures from 36 dogs across central and southern Italy that were naturally infected by A. vasorum. Of them, 23 (63.9%) presented at least one clinical sign, while 13 (36.1%) were subclinically infected and apparently healthy. Overall, 19 dogs (52.8%) showed cardiorespiratory signs, 14 (38.9%) had non-specific abnormalities, 2 (5.6%) presented coagulation disorders and 1 (2.8%) had a severe neurological condition. Importantly, four dogs presenting with clinical signs had neither cough nor dyspnea. These results underline that angiostrongylosis should be included in the differential diagnosis, even when dogs display only non-specific clinical signs. The proportion of apparently healthy dogs highlights the relevance of routine copromicroscopic and/or antigenic tests in enzootic areas to avoid the sudden onset of potentially life-threatening signs.

scholarly journals Survey of lungworm infection of domestic cats in Hungary

2019 ◽  
Vol 67 (3) ◽  
pp. 407-417 ◽  
Author(s):  
Sára Kiszely ◽  
Mónika Gyurkovszky ◽  
Norbert Solymosi ◽  
Róbert Farkas
Keyword(s):  
Clinical Signs ◽  
Morphological Identification ◽  
Domestic Cats ◽  
Aelurostrongylus Abstrusus ◽  
Respiratory Disorders ◽  
First Instar ◽  
Faecal Samples ◽  
First Time ◽  
Apparently Healthy

From 61 settlements of 12 Hungarian counties, 303 domestic cats were included in this survey. Between autumn 2016 and spring 2018, fresh faecal samples were randomly collected and examined by flotation and by the Baermann–Wetzel method for the presence of lungworm infection. No eggs of Eucoleus aerophilus were detected. Morphological identification of first instar larvae (L1) was also carried out. In the faeces of 60 cats (19.8%) from 17 settlements and Budapest, L1 of Aelurostrongylus abstrusus were found. More than half of the cats were from the western part of the country. The average number of larvae per gram of faeces was 190.2 ± 304.88. These results are in line with the former findings on the prevalence of aelurostrongylosis of domestic cats in Hungary. In addition, Oslerus rostratus was also found for the first time in the faecal samples of three cats from the eastern part of the country, infected also with Ae. abstrusus. The average age (2.51 ± 1.26 years) of infected cats indicates that lungworm infection is more common among younger cats. No relationship was found between the lung-worm infection and the sex of cats. Non-neutered cats had a significantly higher proportion of lungworm infections. Two-thirds of the infected cats were apparently healthy, and only 19 individuals showed clinical signs of respiratory disorders.

scholarly journals Evaluation of Four Rapid Antigen Tests for Detection of SARS-CoV-2 virus

2021 ◽  
Vol 36 (5) ◽  
pp. e297-e297
Author(s):  
Sulaiman Al-Alawi ◽  
Hala Al-Hinai ◽  
Nawal Al-Kindi ◽  
Mohammed Al-Rashidi ◽  
Hanan Al-Kindi ◽  
...  
Keyword(s):  
Rapid Test ◽  
Diagnostic Algorithm ◽  
High Specificity ◽  
Significant Negative Correlation ◽  
Test Accuracy ◽  
Reverse Transcription Pcr ◽  
Negative Results ◽  
Significant Burden ◽  
Antigen Tests ◽  
Low Sensitivity

Objectives: Considering the increasing, significant burden that coronavirus disease 2019 (COVID-19) imposes on the healthcare system, the need for simple, rapid, and affordable diagnostic tests to support the existing costly and demanding polymerase chain reaction (PCR) assay becomes required. This prospective diagnostic test accuracy study aims to evaluate the performance of four different COVID-19 rapid antigen tests compared to real-time reverse transcription PCR (rRT-PCR) between June and July 2020 to determine the feasibility of integrating these tests into the diagnostic algorithm in clinical settings. Methods: Swabs were collected from 306 patients and analyzed using rRT-PCR and antigen tests from four different providers. Results: The antigen tests’ sensitivities were 65.8%, 69.8%, 64.0%, and 64.3% for the STANDARD™ Q COVID-19 Ag test, PCL COVID-19 Ag Rapid fluorescent immunoassay (FIA) test, BIOCREDIT COVID-19 Ag test, and Sofia SARS-CoV-2 antigen FIA test, respectively. Specificity was 94.1% for PCL COVID-19 Ag Rapid test and 100% for the other three assays. All assays showed a significant negative correlation between the reference rRT-PCR Ct values and Ag test results. Besides, sensitivities of the STANDARD™ Q COVID-19 Ag test, PCL COVID-19 Ag Rapid FIA test, and BIOCREDIT COVID-19 Ag test improved to ≥ 85% after exclusion of samples with PCR Ct values > 30. Conclusions: The high specificity of the rapid antigen tests and other parameters like simplicity, rapidity, and affordability suggest that antigen tests are likely to be helpful if integrated and interpreted appropriately in stepwise diagnostic algorithms. Given the low sensitivity of 64.0–69.8% of the antigen tests, we recommend that clinically relevant negative results undergo further testing Ag to confirm or exclude a COVID-19 diagnosis.

scholarly journals The detection of canine parvovirus type 2c of Asian origin in dogs in Romania evidenced its progressive worldwide diffusion

2021 ◽  
Vol 17 (1) ◽  
Author(s):  
Andrea Balboni ◽  
Mihaela Niculae ◽  
Serena Di Vito ◽  
Lorenza Urbani ◽  
Alessia Terrusi ◽  
...  
Keyword(s):  
Amino Acid ◽  
Acute Gastroenteritis ◽  
Clinical Signs ◽  
Canine Parvovirus ◽  
Amino Acid Residues ◽  
Asian Origin ◽  
Vp2 Gene ◽  
Faecal Samples ◽  
Canine Population ◽  
Pcr Targeting

Abstract Background Canine parvovirus (CPV) is one of the most important pathogens of dogs. Despite vaccination, CPV infections are still ubiquitous in dogs, and the three antigenic variants 2a, 2b and 2c are variously distributed in the canine population worldwide. To date, no information is available on CPV variants circulating in some European countries. The aim of this study was to genetically characterise the CPV detected in ten dogs with clinical signs of acute gastroenteritis in Romania. The presence of Carnivore protoparvovirus 1 DNA was investigated in faecal samples using an end-point PCR targeting the complete VP2 gene and positive amplicons were sequenced and analysed. Results All ten dogs with acute gastroenteritis tested positive to Carnivore protoparvovirus 1 DNA in faecal samples. The identified viruses belonged to CPV-2c type, showed identical sequences of the VP2 gene and were characterised by distinctive amino acid residues in the deduced VP2 protein: 5-glicine (5Gly), 267-tirosine (267Tyr), 324-isoleucine (324Ile) and 370-arginine (370Arg). These distinctive amino acid residues have already been reported in CPV-2c widespread in Asia and occasionally detected in Italy and Nigeria. Conclusions Since CPV-2c with VP2 amino acid residues 5Gly, 267Tyr, 324Ile and 370Arg were never reported before 2013, it can be assumed that this virus is progressively expanding its spread in the world dog population. This study adds new data about the presence of this new virus in Europe and underline worrying questions about its potential impact on the health of the canine population.

Equine influenza: a comprehensive review from etiology to treatment

2021 ◽  
pp. 1-16
Author(s):  
Luís Dionísio ◽  
Francisco Medeiros ◽  
Manuel Pequito ◽  
Ana I. Faustino-Rocha
Keyword(s):  
Diagnostic Tests ◽  
Influenza A ◽  
Clinical Signs ◽  
Vaccination Status ◽  
Upper Respiratory Tract ◽  
Influenza A Viruses ◽  
Comprehensive Review ◽  
Equine Influenza ◽  
Rapid Spread ◽  
Upper Respiratory

Abstract Influenza is an extremely contagious respiratory disease, which predominantly affects the upper respiratory tract. There are four types of influenza virus, and pigs and chickens are considered two key reservoirs of this virus. Equine influenza (EI) virus was first identified in horses in 1956, in Prague. The influenza A viruses responsible for EI are H7N7 and H3N8. Outbreaks of EI are characterized by their visible and rapid spread, and it has been possible to isolate and characterize H3N8 outbreaks in several countries. The clinical diagnosis of this disease is based on the clinical signs presented by the infected animals, which can be confirmed by performing complementary diagnostic tests. In the diagnosis of EI, in the field, rapid antigen detection tests can be used for a first approach. Treatment is based on the management of the disease and rest for the animal. Regarding the prognosis, it will depend on several factors, such as the animal's vaccination status. One of the important points in this disease is its prevention, which can be done through vaccination. In addition to decreasing the severity of clinical signs and morbidity during outbreaks, vaccination ensures immunity for the animals, reducing the economic impact of this disease.

scholarly journals Spirocercosis in Dogs in Israel

2019 ◽  
Vol 63 (2) ◽  
pp. 8-14
Author(s):  
N. Geva ◽  
G. Štrkolcová
Keyword(s):  
Intermediate Host ◽  
Clinical Signs ◽  
Preventative Treatment ◽  
Disease Treatment ◽  
Spirocerca Lupi ◽  
Infective Larvae ◽  
Negative Results ◽  
Faecal Samples ◽  
Advanced Stages ◽  
Paratenic Hosts

Abstract Spirocerca lupi is a nematode causing spirocercosis disease that affects mostly carnivores and especially canidae. The life cycle of S. lupi includes a coprophagous beetle as an obligatory intermediate host and a variety of facultative paratenic hosts. In Israel, spirocercosis is considered to be a serious condition with a variety of clinical signs comprising a great risk to canine populations. The diagnosis at an early infective stage is unreliable and the vast majority of infected dogs are diagnosed only when the disease has advanced. In advanced stages of the disease, treatment is difficult and there is a high risk for complications. A study was carried out to compare the prevalence of S. lupi in the central region of Israel with a previous investigation and by that consequently try to estimate the efficacy of preventative treatment used nowadays in Israel. The study was done by the use of two different methods: looking for the infective larvae (L3) in the main intermediate host in Israel, Ontophagus sellatus, and searching for the eggs of S. lupi by performing flotation methods on faecal samples. Beetles and faecal samples were collected from four different locations in the winter and summer of 2017, 2018, and 2019. According to the literature review and collection of data from case studies, the prevalence of spirocercosis is increasing in Israel, despite the negative results from the dissections of beetles and faecal samples.

scholarly journals Comparison of Eight Commercially Available Faecal Point-of-Care Tests for Detection of Canine Parvovirus Antigen

Viruses ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 2080
Author(s):  
Julia Walter-Weingärtner ◽  
Michèle Bergmann ◽  
Karin Weber ◽  
Uwe Truyen ◽  
Cosmin Muresan ◽  
...  
Keyword(s):  
Point Of Care ◽  
Clinical Signs ◽  
Kappa Statistic ◽  
Laboratory Diagnosis ◽  
Canine Parvovirus ◽  
Predictive Values ◽  
Shelter Dogs ◽  
Low Sensitivity ◽  
Sensitivity Specificity ◽  
Point Of Care Tests

A real-time polymerase chain reaction (qPCR) is considered the gold standard for the laboratory diagnosis of canine parvovirus (CPV) infection but can only be performed in specialized laboratories. Several point-of-care tests (POCT), detecting CPV antigens in faeces within minutes, are commercially available. The aim of this study was to evaluate eight POCT in comparison with qPCR. Faecal samples of 150 dogs from three groups (H: 50 client-owned, healthy dogs, not vaccinated within the last four weeks; S: 50 shelter dogs, healthy, not vaccinated within the last four weeks; p = 50 dogs with clinical signs of CPV infection) were tested with eight POCT and qPCR. Practicability, sensitivity, specificity, positive (PPV) and negative predictive values (NPV), as well as overall accuracy were determined. To assess the differences between and agreement among POCT, McNemar’s test and Cohen’s Kappa statistic were performed. Specificity and PPV were 100.0% in all POCT. Sensitivity varied from 22.9–34.3% overall and from 32.7–49.0% in group P. VetexpertRapidTestCPVAg® had the highest sensitivity (34.3% overall, 49.0% group P) and differed significantly from the 3 POCT with the lowest sensitivities (Fassisi®Parvo (27.7% overall, 36.7% group P), Primagnost®ParvoH+K (24.3% overall, 34.7% group P), FASTest®PARVOCard (22.9% overall, 32.7% group P)). The agreement among all POCT was at least substantial (kappa >0.80). A positive POCT result confirmed the infection with CPV in unvaccinated dogs, whereas a negative POCT result did not definitely exclude CPV infection due to the low sensitivity of all POCT.

scholarly journals Research on factors that influence the course of canine parvovirosis

2021 ◽  
Vol 77 (07) ◽  
pp. 6552-2021
Author(s):  
ALICJA WÓJCIK ◽  
STANISŁAW WINIARCZYK ◽  
ŁUKASZ ADASZEK
Keyword(s):  
Cell Lines ◽  
Virus Strain ◽  
Cytopathic Effect ◽  
Clinical Signs ◽  
Canine Parvovirus ◽  
Faecal Samples ◽  
Study Results ◽  
Vaccination History ◽  
History Of ◽  
The Mean

The aim of this study was to demonstrate correlations of the course of canine parvovirus infection and the rate of cytopathic effect (CPE) on CPV-infected CCC clone 81 cell lines with the age of the affected animals, their history of CPV vaccination and the strain of the virus causing the infection. Forty-five dogs with parvovirus confirmed by rapid diagnostic tests and PCR were studied. Faecal samples from diseased animals were used to infect cell lines, which were then observed for a cytopathic effect. The statistical analysis of the results obtained demonstrated a positive correlation between the recovery rate of the diseased animals and the fact that they had been vaccinated against CPV. In dogs that had been vaccinated against CPV, the mean duration of the disease was 6 days, whereas in the group of unvaccinated dogs it was 7 days. The course of the disease also depended on the virus strain. It was shown that dogs from which the CPV-2a strain was isolated took longer to recover, had more severe clinical signs and higher mortality. The cytopathic effect appeared in all infected cultures, while the rate at which changes occurred was independent of the virus strain with which the cells were infected, the age of the dogs from which CPV was isolated and their CPV vaccination history. The study results obtained may serve as valuable prognostic guidelines as to the duration of and recovery from canine parvovirus infection.

Chronic Wasting Disease Options of Surveillance in Carpathian Cervids: from the Identification of Characteristic Microscopic Pathologic Changes to Prionic Seeded Conversion and Amplification Assays

2001 ◽  
Vol 71 (3) ◽  
pp. 480-486
Author(s):  
Florica Barbuceanu ◽  
Stelian Baraitareanu ◽  
Stefania-Felicia Barbuceanu ◽  
Gabriel Predoi
Keyword(s):  
Enzyme Immunoassay ◽  
Diagnostic Tests ◽  
Chronic Wasting Disease ◽  
Rapid Diagnostic Tests ◽  
Diagnostic Methods ◽  
Wasting Disease ◽  
Western Immunoblotting ◽  
Negative Results ◽  
Antigen Capture ◽  
Confirmatory Tests

This paper describes the current diagnostic methods of Chronic Wasting Disease (CWD) in cervides used between 2013 and 2017 in Romania. The active surveillance of CWD involves the targeted groups screening by using rapid diagnostic tests (e.g., antigen capture enzyme immunoassay). If the first test does not provide certain negative results, then the confirmatory methods have been used, i.e. histopathology, immunohistochemistry and Western immunoblotting. These tests did not lead to the detection of CWD prions (PrPCWD) in Romania. This may be due to the absence or insufficient quantity of PrPCWD in samples, below the threshold of confirmatory tests.

COVID-19: how nuclear medicine can provide a differential diagnosis in very dubious case

Coronaviruses ◽  
2020 ◽  
Vol 01 ◽  
Author(s):  
Maria Silvia De Feo ◽  
Viviana Frantellizzi ◽  
Giuseppe De Vincentis
Keyword(s):  
Infectious Disease ◽  
Differential Diagnosis ◽  
Ct Scan ◽  
Imaging Technique ◽  
False Negative ◽  
Clinical Signs ◽  
Negative Results ◽  
Infectious Disease Department ◽  
False Negative Results ◽  
99Mtc Hmpao

Background: We present the case of a 55-year-old woman, admitted to the Infectious Disease Department of Policlinico Umberto I, Rome, in mid-March 2020, with suspicion of COVID-19 infection. Objective: The rRT-PCR was negative and the following CT scan, performed to exclude false-negative results and help diagnosis, was inconclusive. Methods: It was decided to submit the patient to 99mTc-HMPAO-labelled leukocyte scan. Results: This exam led to the diagnosis of infective endocarditis. Conclusion: In the present pandemic scenario, 99mTc-HMPAO-labelled leukocyte scan represents a reliable imaging technique for differential diagnosis with COVID-19 in patients with confusing clinical signs, possible false-negative rRT-PCR results and inconclusive CT scan.

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