scholarly journals Nosema Disease of European Honey Bees

2021 ◽  
Vol 7 (9) ◽  
pp. 714
Author(s):  
Richard Galajda ◽  
Alexandra Valenčáková ◽  
Monika Sučik ◽  
Petra Kandráčová
Keyword(s):  
Honey Bees ◽  
Parasitic Infection ◽  
Laboratory Diagnostics ◽  
Chain Reaction ◽  
Factors Associated ◽  
Polymerase Chain ◽  
Main Factors ◽  
Bee Disease ◽  
The Right ◽  
Nosema Disease

Nosematosis is currently a frequently discussed honey bee disease caused by two types of Microsporidia: Nosema apis and Nosema ceranae. Nosematosis as an intestinal disease caused by these species is one of the main factors associated with the weakening and loss of hives, with none of the stressors acting in isolation and all having an important synergistic or additive effect on the occurrence of parasitic infection. The most important factors are exposure to pesticides and nutritional stress, both worsening the immune response. Honey bees Apis mellifera become more susceptible to parasites and subsequently the disease manifests itself. Choosing the right laboratory diagnostics is important to determine the prevalence of both species. Our review summarizes the most commonly used methodologies, especially polymerase chain reaction (PCR), which is a reliable method for detecting nosematosis, as well as for distinguishing between the two species causing the disease.

scholarly journals Refractory pemphigus vulgaris associated with herpes infection: case report and review

2011 ◽  
Vol 53 (2) ◽  
pp. 113-117 ◽  
Author(s):  
Maria Luiza Figueiredo Braga Brandão ◽  
Nurimar C. Fernandes ◽  
Danielle Pereira De Oliveira Batista ◽  
Norma Santos
Keyword(s):  
Sequence Analysis ◽  
Pemphigus Vulgaris ◽  
Chain Reaction ◽  
Upper Eyelid ◽  
Triggering Factor ◽  
Polymerase Chain ◽  
Genetic And Environmental Factors ◽  
The Right ◽  
Hsv 1

BACKGROUND: Pemphigus vulgaris (PV) is an autoimmune disease characterized by blistering of the skin and mucosa, which develops due to the interaction between predisposing genetic and environmental factors. Infections caused by members of the Herpesviridae family have been suggested as a possible triggering factor for PV. OBJECTIVE AND METHODS: In this report, we investigate the presence of herpesviruses in refractory lesions on the right upper eyelid. The lesion has persisted despite the treatment with corticosteroids. Polymerase chain reaction (PCR) and DNA sequence analysis have been used to detect the DNA of HSV 1/2, VZV, EBV, CMV, HHV-6, HHV-7, and HHV-8. RESULTS: The sample collected from the right upper eyelid has tested positive for HSV 1/2. Sequence analysis has confirmed the PCR results and allowed the identification of the HSV strain as belonging to type 1. After treatment with acyclovir, the lesion of the right upper eyelid has cleared and not relapsed. CONCLUSION: When patients present PV lesions which are refractory to corticosteroid therapy, herpetic infection should be considered.

scholarly journals Adult gonococcal keratoconjunctivitis: early detection is key

2020 ◽  
Vol 17 (1) ◽  
pp. 30-34
Author(s):  
Daniel Lai ◽  
Keith Ong
Keyword(s):  
Polymerase Chain Reaction ◽  
Early Detection ◽  
Neisseria Gonorrhoeae ◽  
Ophthalmic Solution ◽  
Careful Monitoring ◽  
Corneal Ulceration ◽  
Chain Reaction ◽  
Bacterial Conjunctivitis ◽  
Polymerase Chain ◽  
The Right

We describe a case of a 52-year-old male presenting with severe mucopurulent conjunctivitis of the right eye. Corneal ulceration and associated anterior chamber activity was noted later in the course of the disease. Neisseria gonorrhoeae was positive on polymerase chain reaction (PCR) testing earlier than traditional microscopy and culture. He was successfully treated with ceftriaxone 500 mg intravenously and azithromycin 1 g orally as single doses in addition to ofloxacin ophthalmic solution 0.3% hourly to the right eye. This case highlights the need to consider the possibility of gonococcus in cases of suspected bacterial conjunctivitis, careful monitoring for corneal involvement and the importance of early detection with PCR.

scholarly journals Factors Associated with HIV prevalence among HIV-exposed Infants with HIV DNA Polymerase Chain Reaction Tests in Malawi: 2013-2020

2021 ◽  
Author(s):  
Wingston Ng'ambi ◽  
Janne Estill ◽  
Fatma Aziza Merzouki ◽  
Erol Orel ◽  
Tiwonge Chimpandule ◽  
...  
Keyword(s):  
Hiv Infection ◽  
Temporal Trends ◽  
Chain Reaction ◽  
Factors Associated ◽  
Hiv Dna ◽  
Polymerase Chain ◽  
Hiv Exposed ◽  
Spatial And Temporal Trends ◽  
Dna Pcr ◽  
Test Result

Background: Despite the high availability of individual-level data of infants accessing HIV DNA polymerase chain reaction (DNA-PCR) testing service, there has been little in-depth analysis of such data. Therefore, we describe spatial and temporal trends in risk of HIV infection among Malawi HIV-exposed infants (HEI) with DNA-PCR HIV test result from 2013 to 2020. Methods: This is an implementation study using routinely collected patient-level HIV DNA-PCR test result data extracted from the national Laboratory Management Information System database managed by the Department of HIV/AIDS between 1 January 2013 and 30 June 2020. We calculated frequencies, proportions and odds ratios (OR) with their associated 95% confidence intervals (95%CI). We performed a random-effects logistic regression to determine the risk factors associated with HIV infection in infants, controlling for the spatial autocorrelation between districts and adjusting for other variables. Results: We evaluated 255,229 HEI across 750 facilities in 28 districts. The overall risk of HIV infection among all tested HEI between 2013 and 2020 was 7.2% (95%CI: 7.1-7.3). We observed a decreasing trend in the proportion of HEI that tested HIV positive from 7.0% (95%CI: 6.6-7.4) in 2013 to 5.7% (95%CI: 5.4-5.9) in 2015 followed by an increase to 9.9% (95%CI: 9.6-10.2) in 2017 and then a decreasing trend to 4.2% (95%CI: 3.7-4.6) in 2020. The risk of HIV infection increased by age of the HEI. There was spatial heterogeneity of HIV prevalence between districts of Malawi. Conclusion: We summarised spatial and temporal trends of risk of HIV infection amongst HEI in Malawi between 2013 and 2020. There is need for further strengthening of EID program to ensure that all the HEI are enrolled in care by eight weeks of age in order to further reduce mother-to-child transmission of HIV.

scholarly journals Inter- and Intra-Species Diversity of Lactic Acid Bacteria in Apis mellifera ligustica Colonies

2020 ◽  
Vol 8 (10) ◽  
pp. 1578 ◽  
Author(s):  
Massimo Iorizzo ◽  
Gianfranco Pannella ◽  
Silvia Jane Lombardi ◽  
Sonia Ganassi ◽  
Bruno Testa ◽  
...  
Keyword(s):  
Polymerase Chain Reaction ◽  
Lactic Acid ◽  
Apis Mellifera ◽  
Lactic Acid Bacteria ◽  
Honey Bees ◽  
Rrna Gene ◽  
Chain Reaction ◽  
Rapd Pcr ◽  
The Social ◽  
Polymerase Chain

Lactic acid bacteria could positively affect the health of honey bees, including nutritional supplementation, immune system development and pathogen colonization resistance. Based on these considerations the present study evaluated predominant Lactic Acid Bacteria (LAB) species from beebread as well as from the social stomach and midgut of Apis mellifera ligustica honey bee foragers. In detail, for each compartment, the diversity in species and biotypes was ascertained through multiple culture-dependent approaches, consisting of Polymerase Chain Reaction-Denaturing Gradient Gel Electrophoresis (PCR-DGGE), 16S rRNA gene sequencing and Randomly Amplified Polymorphic DNA-Polymerase Chain Reaction (RAPD-PCR). The study of a lactic acid bacteria community, performed with PCR-DGGE and sequence analysis targeting the V1–V3 region of the 16S rRNA gene (rDNA), highlighted the presence of a few species, including Apilactobacillus kunkeei, Lactiplantibacillus plantarum, Fructobacillus fructosus, Levilactobacillus brevis and Lactobacillus delbrueckii subsp. lactis. Depending on the different compartments, diverse levels of biodiversity in species were found. Particularly, a very low inter-species biodiversity was detected in the midgut that was prevalently dominated by the presence of Apilactobacillus kunkeei. On the other hand, the beebread was characterized by a reasonable biodiversity showing the presence of five species and the predominance of Apilactobacillus kunkeei, Lactiplantibacillus plantarum and Fructobacillus fructosus. The RAPD-PCR analysis performed on the three predominant species allowed the differentiation into several biotypes for each species. Moreover, a relationship between biotypes and compartments has been detected and each biotype was able to express a specific biochemical profile. The biotypes that populated the social stomach and midgut were able to metabolize sugars considered toxic for bees while those isolated from beebread could contribute to release useful compounds with functional properties. Based on this knowledge, new biotechnological approaches could be developed to improve the health of honey bees and the quality of bee products.

Identification of Africanized Honey Bees (Hymenoptera: Apidae) Incorporating Morphometrics and an Improved Polymerase Chain Reaction Mitotyping Procedure

1999 ◽  
Vol 92 (2) ◽  
pp. 167-174 ◽  
Author(s):  
David I. Nielsen ◽  
Paul R. Ebert ◽  
Greg J. Hunt ◽  
Ernesto Guzmán-Novoa ◽  
Scott A. Kinnee ◽  
...  
Keyword(s):  
Polymerase Chain Reaction ◽  
Honey Bees ◽  
Chain Reaction ◽  
Africanized Honey Bees ◽  
Polymerase Chain

scholarly journals Leishmania infantum infection in dogs from maroon communities in the Eastern Amazon

2017 ◽  
Vol 47 (1) ◽  
Author(s):  
Andréia Ferreira da Silva ◽  
Ágatha Rossanni Alves Damasceno ◽  
Welton Seabra Prado ◽  
Rossela Damasceno Caldeira ◽  
Francisco Dantas Sampaio-Junior ◽  
...  
Keyword(s):  
Canine Visceral Leishmaniasis ◽  
Risk Map ◽  
Intact Skin ◽  
Chain Reaction ◽  
Blood Samples ◽  
Factors Associated ◽  
Forested Areas ◽  
Polymerase Chain ◽  
Collection Sites ◽  
Skin Samples

ABSTRACT: This study was designed to detect L. infantum infection in dogs and to evaluate the factors associated with canine visceral leishmaniasis in the maroon communities of Menino Jesus de Petimandeua and Itaboca in the municipality of Inhangapi, Pará, Brazil. Whole blood and intact skin samples were collected from 143 dogs, and a questionnaire was applied. L. infantum DNA was detected by polymerase chain reaction (PCR) using primers RV1 and RV2. Collection sites were georeferenced to obtain a spatial distribution of the residences visited and infected dogs. L. infantum DNA was detected in 8.4% (12/143) of the skin samples and in 1.4% (2/143) of the blood samples. On the risk map, three clusters were observed in Itaboca and one was observed in Menino Jesus de Petimandeua. We observed that most of the inhabitants in these maroon communities live close to forested areas and do not use protection against insect vectors. The presence of canine reservoirs of L. infantum associated to environment characteristics (preserved forests and deforested areas) and habits of dog owners (living near forested areas and not using any protection against insects) may favor the transmission of L. infantum in the studied areas.

scholarly journals Vibrio cholerae non-O1 - the first reported case of keratitis in a healthy patient

2019 ◽  
Vol 19 (1) ◽  
Author(s):  
Wei-Dar Chen ◽  
Li-Ju Lai ◽  
Wei-Hsiu Hsu ◽  
Tsung-Yu Huang
Keyword(s):  
Vibrio Cholerae ◽  
Corneal Ulcer ◽  
Positive Outcome ◽  
Ocular Injury ◽  
Significant Morbidity ◽  
Chain Reaction ◽  
Case Presentation ◽  
First Case ◽  
Polymerase Chain ◽  
The Right

Abstract Background Vibrio cholerae non-O1 is a virulent pathogen that causes significant morbidity and mortality in humans. Herein, we report a case of corneal ulcer caused by this pathogen. Case presentation A 59-year-old fisherman with no systemic history was struck in the right eye by a marine shrimp and developed keratitis. Corneal scrapping culture revealed the presence of the V. cholerae non-O1, and its identification was confirmed by Analytical Profile Index 20E system and polymerase chain reaction. He was successfully treated with topical levofloxacin (0.3%) and fortified amikacin (12.5 mg/mL) for 2 weeks. The visual acuity recovered to 20/25 after treatment without complications. Conclusions This is the first case report of keratitis caused by V. cholerae non-O1 strain. Ocular injury by marine creatures and contaminated seawater can contribute to severe corneal ulcer. Early diagnosis can be achieved by meticulous history taking and a comprehensive laboratory workup. Simultaneously, an effective antibiotic therapy can lead to a positive outcome.

scholarly journals The effect of water source and soil supplementation on parasite contamination in organic vegetable gardens

2018 ◽  
Author(s):  
Fernanda Pinto Ferreira ◽  
Eloiza Teles Caldart ◽  
Roberta Lemos Freire ◽  
Regina Mitsuka-Breganó ◽  
Felipe Machado de Freitas ◽  
...  
Keyword(s):  
Management Practices ◽  
Dna Amplification ◽  
Water Source ◽  
Giardia Intestinalis ◽  
Chain Reaction ◽  
Factors Associated ◽  
Cryptosporidium Spp ◽  
Etiologic Agents ◽  
Vegetable Gardens ◽  
Polymerase Chain

Abstract The objective of this study was to determine factors associated with vegetable contamination with zoonotic protozoan. Samples of water, soil and vegetables were collected from July/2014 to May/2016, totaling 83 samples, 21 properties of Londrina region, Paraná, Brazil. DNA amplification of Toxoplasma gondii, Cryptosporidium spp. and Giardia intestinalis in the samples was conducted using polymerase chain reaction (PCR). The PCR results were positive for T. gondii in 12.9% (8/62), Cryptosporidium spp. in 11.3% (7/62) and G. intestinalis in 25.8% (16/62) of the samples. DNA sequencing identified C. parvum in five samples and G. intestinalis Assemblage E in three. The statistical associations demonstrated greater probability of positive samples for T. gondii and for at least one of the three protozoa when the source of irrigation water was the river; a greater chance of positive samples for Cryptosporidium spp. when deer were present on the property; and a smaller chance of positive samples for at least one of the three etiologic agents when soil was supplemented with limestone. The results expose some critical contamination points, providing support for training farmers on good management practices during the production process.

scholarly journals Factors associated to the positive cerebrospinal fuid culture in the tuberculous meningitis

2007 ◽  
Vol 65 (1) ◽  
pp. 48-53 ◽  
Author(s):  
Marzia Puccioni-Sohler ◽  
Carlos Otávio Brandão
Keyword(s):  
Tuberculous Meningitis ◽  
Neurological Complication ◽  
Central Nervous System Involvement ◽  
Positive Culture ◽  
Acute Stage ◽  
Chain Reaction ◽  
High Protein Content ◽  
Factors Associated ◽  
Polymerase Chain ◽  
Csf Examination

Central nervous system involvement is the most common neurological complication in the course of tuberculosis. The lack of rapid and sensitive tests delays the early diagnosis. Here, we retrospectively reviewed the cerebrospinal fluid (CSF) examination of 30 patients with tuberculous meningitis confirmed by bacteriological tests (culture and/or polymerase chain reaction). The purpose of the present study was to determine the CSF parameters associated to the positive CSF culture for Mycobacterium tuberculosis in tuberculous meningitis. We found higher frequency of positive CSF culture in patients infected with HIV as well in patients with high number of neutrophils and high protein content (characteristic in the early or acute-stage patients), which suggests that the positive culture found in these patients may be associated with the presence of high bacillary load in CSF occurring in these stages.

scholarly journals Basidiobolomycosis Simulating a Mycobacterium ulcerans Infection in a Togolese Rural Child

2017 ◽  
Vol 2017 ◽  
pp. 1-3 ◽  
Author(s):  
Bayaki Saka ◽  
Waguena Gnassingbe ◽  
Garba Mahamadou ◽  
Sefako Akakpo ◽  
Julienne Teclessou ◽  
...  
Keyword(s):  
General Condition ◽  
Buruli Ulcer ◽  
Granulomatous Inflammation ◽  
Mycobacterium Ulcerans ◽  
Chain Reaction ◽  
Deep Mycosis ◽  
Sharp Edges ◽  
Polymerase Chain ◽  
The Right ◽  
Multiple Ulcers

Background. Basidiobolomycosis is a deep mycosis which preferentially affects rural young people in tropical countries. We report an atypical case, with multiple ulcers, simulating a Buruli ulcer. Case Report. A 5-year-old boy, living in a rural area, was seen for ulcers on the buttocks and at the back and right flank that had been in progress for 4 months. On examination, we found an infiltrated plaque with sharp edges, little painful, located on the buttocks, back, and the right flank. On this plaque, there were multiple ulcers with polycyclic contours and fibrinous bottom. There were inguinal inflammatory lymph nodes. The patient had an altered general condition. Examination of other organs was normal. The diagnosis of Buruli ulcer was evoked first; the search for Mycobacterium ulcerans by polymerase chain reaction was negative. Histology test performed revealed hypodermic granulomatous inflammation with predominant macrophage and eosinophils. The mycological culture was not done. The child was treated successfully with ketoconazole (10 mg/kg/day) during eight weeks. Discussion. Our observation shows great clinical and epidemiological similarities between basidiobolomycosis and Buruli ulcer. It confirms the efficacy of ketoconazole in severe basidiobolomycosis infection with alteration of general condition. Histopathology is very important for differential diagnosis between these two diseases.

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