scholarly journals Variations of Glossina sp. and trypanosome species frequency within different habitats in a sleeping sickness focus, Gabon

2019 ◽  
Vol 13 (01) ◽  
pp. 67-72
Author(s):  
Ornella Mbang Nguema ◽  
Marielle Bouyou Akotet ◽  
Jacques Mavoungou ◽  
Denise Patricia Mawili Mboumba
Keyword(s):  
Infection Rate ◽  
Disease Surveillance ◽  
Secondary Forest ◽  
Control Measures ◽  
Degraded Forest ◽  
Trypanosome Species ◽  
Ecological Sites ◽  
Trypanosoma Infection ◽  
Polymerase Chain ◽  
And Control

Introduction: Knowledge of the infectious status of the Glossina is an indicator of risk of resurgence of Human African Trypanosomiasis (HAT). Environmental conditions have an impact on the density and diversity of both vector and Trypanosoma. The aim of the study was to determine the diversity and the infection rate of Glossina as well as the diversity of trypanosome species within habitats of an old HAT focus, in Gabon. Methodology: Glossina were captured in September 2012 in three ecological sites. Vavoua traps were installed for twelve days. All captured flies were identified. Glossina were selected for trypanosome identification by Polymerase Chain Reaction. Results: 1178 Glossina were captured: 55.8% in degraded forest, 28.9% in flood area and 15.4% in secondary forest. Glossina fusca congolensis (37%) and G.palpalis palpalis (36.4%) were the most abundant vector species. G. fusca congolensis was predominant in secondary forest and in flood area, while in degraded forest, it was G.palpalis palpalis. Trypanosoma infection rate was 30.7%, 42% in secondary forest, 32% in degraded forest and 18% in flood area. Trypanosoma congolense savannah was the main species detected (18.7%) followed by T.brucei brucei (10.7%) and T. brucei gambiense (4%). T. congolense savannah type was predominant in the secondary forest and in degraded forest (66.7% versus 55.5%). Conclusion: Glossina density and trypanosome infection rate varied according to the habitat within HAT focus. The density of tsetse was the highest in degraded forest while the infection rate was highest in secondary forest. Continuous disease surveillance and control measures are needed.

scholarly journals A review of dengue diagnostics and implications for surveillance and control

2019 ◽  
Vol 113 (11) ◽  
pp. 653-660 ◽  
Author(s):  
Nader Raafat ◽  
Stuart D Blacksell ◽  
Richard J Maude
Keyword(s):  
Disease Surveillance ◽  
Dengue Infection ◽  
Signs And Symptoms ◽  
Diagnostic Methods ◽  
Control Measures ◽  
Polymerase Chain ◽  
Dengue Diagnostics ◽  
Dengue Control ◽  
Age Range ◽  
And Control

Abstract Dengue is the world’s most common arboviral infection, with almost 4 billion people estimated to be living at risk of dengue infection. A recently introduced vaccine is currently recommended only for seropositive individuals in a restricted age range determined by transmission intensity. With no effective dengue vaccine for the general population or any antiviral therapy, dengue control continues to rely heavily on vector control measures. Early and accurate diagnosis is important for guiding appropriate management and for disease surveillance to guide prompt dengue control interventions. However, major uncertainties exist in dengue diagnosis and this has important implications for all three. Dengue can be diagnosed clinically against predefined lists of signs and symptoms and by detection of dengue-specific antibodies, non-structural 1 antigen or viral RNA by reverse transcriptase–polymerase chain reaction. All of these methods have their limitations. This review aims to describe and quantify the advantages, uncertainties and variability of the various diagnostic methods used for dengue and discuss their implications and applications for dengue surveillance and control.

Hong Kong’s response to COVID-19: a glance to the control measures and their enforcement

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Ka Ki Lawrence Ho ◽  
Ying-Tung Chan
Keyword(s):  
Hong Kong ◽  
Infection Rate ◽  
Government Policy ◽  
Design Methodology ◽  
Control Measures ◽  
Content Type ◽  
The Government ◽  
And Control ◽  
Viral Outbreak

Purpose This study aims to examine Hong Kong’s responses to COVID-19, arguing that Hong Kong’s relatively low infection rate is due to self-discipline of citizens together with the enforcement measures introduced by the government. Design/methodology/approach This study reviewed the government policy announcements and the prevailing scholarly analyses on Hong Kong society during COVID-19. Findings It starts by examining the partial lockdown and control measures since mid-January, and the roles of different government units in enforcement were examined and assessed. Suppression of viral outbreak in Hong Kong should primarily be attributed to the appropriate lockdown and quarantine actions of the government. Originality/value However, outperformance of the frontline professionals and the highly aware, self-disciplined and mutually aided citizens in the community are also the key to the “interim success” by June 2020 in the highly accessible and densely populated city.

Suspected transmission of norovirus in eight long-term care facilities attributed to staff working at multiple institutions

2011 ◽  
Vol 140 (9) ◽  
pp. 1702-1709 ◽  
Author(s):  
L. M. NGUYEN ◽  
J. P. MIDDAUGH
Keyword(s):  
Long Term Care ◽  
Control Measures ◽  
Regulatory Agencies ◽  
Term Care ◽  
Staff Members ◽  
Care Facilities ◽  
Stool Specimens ◽  
Polymerase Chain ◽  
And Control

SUMMARYThis study reports on gastroenteritis outbreaks suspected of being norovirus infections in eight long-term care facilities. A descriptive epidemiological investigation was used to depict sources of infections and control measures. Outbreaks affected 299 (31%) of 954 residents and 95 (11%) of 843 staff. Attack rates were higher in residents (range 17–55%) than staff (range 3–35%). Person-to-person spread was suspected. The case-hospitalization rate was 2·5%, and no death occurred. Eight staff members were employed at multiple affected facilities and may have introduced disease into three facilities. Thirty-two stool specimens were positive for norovirus by real-time reverse transcriptase–polymerase chain reaction or enzyme immunoassay. Sequenced specimens were closely related to GII.4 New Orleans. A concurrent Clostridium difficile outbreak was also detected at one facility. Staff members who work at multiple facilities may transmit norovirus between them. Regulatory agencies should consider precluding ill staff from working in multiple facilities during outbreaks. Guidelines to control norovirus must be applied promptly and meticulously by facilities.

scholarly journals Home Sweet Home: New Insights Into the Location of Equine Premises in France and Keeping Habits to Inform Health Prevention and Disease Surveillance

2021 ◽  
Vol 8 ◽  
Author(s):  
Halifa Farchati ◽  
Aurelie Merlin ◽  
Mathilde Saussac ◽  
Xavier Dornier ◽  
Mathilde Dhollande ◽  
...  
Keyword(s):  
Disease Surveillance ◽  
Control Measures ◽  
Relative Location ◽  
Health Prevention ◽  
Health Events ◽  
Email Address ◽  
Wide Range ◽  
Administrative Unit ◽  
And Control ◽  
Email Survey

Identifying and tracking equines are key activities in equine health prevention. France is one of the few European countries with an operational centralized database that records information on equines, owners, and keepers but not on the location and keeping conditions of equines. The objective of our study was to collect information on keeping habits of equines and the relative location of a wide range of equines, owners, and keepers and discuss their implication for surveillance and control of outbreak improvement. A national email survey was conducted among the 1.9% of people registered as owners and 8.2% of people registered as keepers in the French national equine identification database having given their agreement to be contacted by email. It led to the collection of information from 728 owners, 121 keepers, and 2,669 owner–keepers. Most of them housed their equines in a single commune (smallest geographic administrative unit in France) at their home as private individuals. The distance between the communes of residence and of holding was, in most cases (including 79% of owners in the owner survey, 89.5% of the keepers in the keeper survey, and about 94% of the owner–keepers in both surveys), less than 30 km. More than half of the keepers kept a maximum of five equines and the majority with two different uses/destinations together, mostly leisure-retirement, leisure-breeding, leisure-sport, and sport-breeding. The main limitation of the study was that a relatively limited number of people (n = 3518) were reachable due to the low availability of an email address and contact agreement. Nonetheless, the findings provide an overview of how equines are kept by non-professional owners and keepers and complements information usually collected by the French riding institute. Additionally, information collected is very helpful to determine a realistic estimate of the spatial distribution of equines in France. This information is very important for the equine sector, for demographic knowledge and also improvement of surveillance plans and control measures and for the management and monitoring of health events to limit the spread of diseases.

scholarly journals The specificity of phage testing for MAP — where might it fit into the diagnostic armoury?

Livestock ◽  
2019 ◽  
Vol 24 (4) ◽  
pp. 176-179
Author(s):  
Benjamin MC Swift ◽  
Catherine ED Rees
Keyword(s):  
Polymerase Chain Reaction ◽  
Mycobacterium Avium ◽  
Control Measures ◽  
Enzyme Linked Immunosorbent Assay ◽  
Chain Reaction ◽  
Individual Level ◽  
Early Stages ◽  
Polymerase Chain ◽  
Mycobacterium Avium Subsp Paratuberculosis ◽  
And Control

The current individual tools available for the diagnosis of Johne's disease are far from suitable to tackle this endemic disease. Culture, polymerase chain reaction (PCR) and enzyme-linked immunosorbent assay (ELISA) tests, when used together can be useful in managing the disease in the later stages of infection at a herd level. They are, however, ill-suited to detecting the causative agent Mycobacterium avium subsp. paratuberculosis (MAP) at the early stages of infection and at an individual level. Phage technology offers another tool in the attempt to better manage and control this disease. Phage-technology has been demonstrated to rapidly and sensitively detect and specifically identify viable MAP in the milk and blood of cattle. Although in relatively-early stages of development phage technology offers a strong addition to the armoury of tests used to detect MAP in blood and milk, and may go on to be part of ongoing control measures to reduce the burden of disease to farmers and veterinarians.

scholarly journals Three infection clusters related with potential pre-symptomatic transmission of coronavirus disease (COVID-19), Shanghai, China, January to February 2020

2020 ◽  
Vol 25 (33) ◽  
Author(s):  
Xiaohuan Gong ◽  
Wenjia Xiao ◽  
Yan Cui ◽  
Yuanping Wang ◽  
Dechuan Kong ◽  
...  
Keyword(s):  
Control Measures ◽  
Secondary Case ◽  
Primary Case ◽  
Illness Onset ◽  
Polymerase Chain ◽  
Hospital Visits ◽  
Prevention And Control Measures ◽  
And Control ◽  
Cluster 2 ◽  
Epidemiological Information

We report three clusters related with potential pre-symptomatic transmission of coronavirus disease (COVID-19) between January and February 2020 in Shanghai, China. Investigators interviewed suspected COVID-19 cases to collect epidemiological information, including demographic characteristics, illness onset, hospital visits, close contacts, activities’ trajectories between 14 days before illness onset and isolation, and exposure histories. Respiratory specimens of suspected cases were collected and tested for SARS-CoV-2 by real-time reverse-transcriptase polymerase chain reaction (rRT-PCR) assay. The interval between the onset of illness in the primary case and the last contact of the secondary case with the primary case in our report was 1 to 7 days. In Cluster 1 (five cases), illness onset in the five secondary cases was 2 to 5 days after the last contact with the primary case. In Cluster 2 (five cases) and Cluster 3 (four cases), the illness onset in secondary cases occurred prior to or on the same day as the onset in the primary cases. The study provides empirical evidence for transmission of COVID-19 during the incubation period and indicates that pre-symptomatic person-to-person transmission can occur following sufficient exposure to confirmed COVID-19 cases. The potential pre-symptomatic person-to-person transmission puts forward higher requirements for prevention and control measures.

scholarly journals Field services : eradication and control of animal diseases : animal health management in the 21st century

2009 ◽  
Vol 76 (1) ◽  
Author(s):  
B.M. Modisane
Keyword(s):  
Disease Surveillance ◽  
Health Management ◽  
Animal Health ◽  
Movement Control ◽  
Control Measures ◽  
Veterinary Services ◽  
Political Will ◽  
Animal Diseases ◽  
Cross Border ◽  
And Control

Prevention, eradication and control of animal diseases, as well as public health assurance are major functions of veterinary authorities. The strategies to control animal diseases differ from disease to disease but are often similar on a disease basis from country to country depending on the main objective of the measure employed. These measures include among others movement control and quarantine, vaccination, treatment and mass slaughtering. However, not every country uses all these control measures at the same time. A combination of measures may be employed to avoid spreading of the disease from infected to clean animals and success is dependent on a variety of factors, including the strength and capacity of the veterinary services, cross border efforts for disease surveillance, political will, diagnostic facilities and financial support.

scholarly journals Knowledge, Attitudes, Psychosocial Perspectives and Applied Epidemiology in the Control of Head Lice (pediculosis capitis) in Croatian Preschool Children: A Qualitative Study on Childcare Professionals and Health Coordinators

Children ◽  
2022 ◽  
Vol 9 (1) ◽  
pp. 66
Author(s):  
Marijana Neuberg ◽  
Ines Banfić ◽  
Tina Cikač ◽  
Rosana Ribić ◽  
Sanja Zember ◽  
...  
Keyword(s):  
Disease Surveillance ◽  
Social Issues ◽  
Social Stigma ◽  
Control Measures ◽  
Kindergarten Children ◽  
Head Lice ◽  
Pediculosis Capitis ◽  
The Republic ◽  
Prevention And Control Measures ◽  
And Control

This study aimed to concurrently determine the perceived knowledge, attitudes and perspectives of childcare professionals working in kindergartens towards pediculosis capitis, a common ectoparasitic disease also known as head lice, as well as gain insights into procedures and control measures that are implemented in an outbreak setting. We used a qualitative approach with a problem-centered, semi-structured and three-part interview technique conducted in selected kindergartens of Varaždin and Međimurje counties of the Republic of Croatia. Based on a purposive (deliberate) sampling method, the study included both childcare professionals and on-site health coordinators aged between 21 and 56 years of age. Five main themes were put forth as a result of the conducted thematic analysis: prevention and control measures for managing head lice, information and knowledge, social issues, psychological issues and disease perception. Each of these themes also had specific emerging categories based on participants’ responses. Even though all respondents confirmed that the disease is continuously monitored only a few of them mentioned that a scalp examination was an inherent part of disease surveillance within the kindergarten community. Moreover, we found that information on pediculosis capitis is available to both parents and childcare professionals, but with a questionable uptake. Additionally, the majority of the respondents reported that parents tend to hide the infestation in their children due to shame and/or to avoid social stigma, and thus often fail to inform kindergarten teachers and health coordinators about the problem. In conclusion, our findings have implications for further practice and the introduction of tailored public health measures for the most vulnerable populations, most notably kindergarten children.

scholarly journals Travel-associated Legionnaires’ disease: would changing cluster definition lead to the prevention of a larger number of cases?

2018 ◽  
Vol 147 ◽  
Author(s):  
M. C. Rota ◽  
A. Bella ◽  
M. G. Caporali ◽  
A. Nicolau ◽  
V. Drasar ◽  
...  
Keyword(s):  
Legionella Pneumophila ◽  
Disease Surveillance ◽  
Control Measures ◽  
Surveillance Network ◽  
Stringent Control ◽  
European Guidelines ◽  
Increased Risk ◽  
Legionnaires Disease ◽  
And Control ◽  
Full Investigation

AbstractAccording to European Guidelines for Legionnaires’ Disease prevention and control, travel-associated Legionnaires’ disease (TALD) cases are managed differently if classified as sporadic or as part of a cluster and more stringent control measures are deployed after clusters are identified. In this study, we propose to modify the current cluster definition: ‘two or more cases of Legionnaires’ disease (LD) who stayed at, or visited, the same commercial accommodation site 2–10 days before onset of illness and whose onset is within the same 2-year period’ with a new cluster definition, i.e. accommodation sites associated with multiple cases regardless of the time elapsed between them. TALD cases occurred in Italy and in the Balearic Islands between 2005 and 2015 were analysed applying the current European Legionnaires’ Disease Surveillance Network (ELDSNet) cluster definition. In a sample of selected accommodation sites with multiple cases, a microbiological study was also conducted. Using the new definition, 63 additional sites (16.4% increase) and 225 additional linked cases (19.5% increase) were identified.Legionella pneumophilasg1 was isolated from 90.7% of the selected accommodation sites. The use of the here proposed TALD cluster definition would warrant a full investigation for each new identified case. This approach should therefore increase the number of sites that will require a risk assessment and, in the presence of an increased risk, the adoption of LD control measures to hopefully prevent additional cases.

Parasitological and molecular detection of Trypanosoma spp. in cattle, goats and sheep in Somalia

Parasitology ◽  
2020 ◽  
Vol 147 (14) ◽  
pp. 1786-1791
Author(s):  
Ahmed A. Hassan-Kadle ◽  
Abdalla M. Ibrahim ◽  
Hamisi S. Nyingilili ◽  
Abdulkarim A. Yusuf ◽  
Rafael F. C. Vieira
Keyword(s):  
Internal Transcribed Spacer ◽  
Molecular Detection ◽  
Trypanosoma Evansi ◽  
Buffy Coat ◽  
Control Measures ◽  
Chain Reaction ◽  
Blood Samples ◽  
Polymerase Chain ◽  
Animal Trypanosomiasis ◽  
And Control

AbstractAfrican animal trypanosomiasis (AAT) affects the livestock of 12.3 million Somalis and constrains their development and wellbeing. There is missing data on AAT in the country after the civil war of the 1990s. Therefore, this study has aimed to assess the prevalence of Trypanosoma spp. in 614 blood samples from cattle (n = 202), goats (n = 206) and sheep (n = 206) in Afgoye and Jowhar districts, Somalia using parasitological and molecular methods. Twenty-one out of 614 (3.4%; 95% CI: 2.1–5.2%) and 101/614 (16.4%; 95% CI: 13.6–19.6%) ruminants were positive for Trypanosoma spp. by buffy coat technique (BCT) and internal transcribed spacer 1 (ITS1)-polymerase chain reaction (PCR), respectively. Using ITS1-PCR, the highest prevalence was observed in cattle (23.8%; 95% CI: 18.4–30.1%) followed by goats (17.5%; 95% CI: 12.9–23.3%) and sheep (8.3%; 95% CI: 5.1–12.9%). A total of 74/101 (73.3%; 95% CI: 63.5–81.6%) ruminants were shown coinfection with at least two Trypanosome species. The four T. brucei-positive samples have tested negative for T. b. rhodesiense, by the human-serum-resistance-associated-PCR. Trypanosoma evansi, T. godfreyi, T. vivax, T. brucei, T. simiae and T. congolense were the Trypanosoma species found in this study. This is the first study on the molecular detection of Trypanosoma sp. in ruminants in Somalia. Further investigations and control measures are needed to manage Trypanosomiasis spreading in the country. Studies should also focus on the detection of T. b. rhodesiense in the country.

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