scholarly journals Seroepidemiological Survey of Canine Leishmania Infections from Peripheral Areas in Natal, Northeast Brazil

2015 ◽  
Vol 9 (1) ◽  
pp. 43-47 ◽  
Author(s):  
Isabelle Ribeiro Barbosa ◽  
Francisco Canindé Carlota ◽  
Valter Ferreira de Andrade-Neto
Keyword(s):  
Public Health ◽  
Visceral Leishmaniasis ◽  
Clinical Signs ◽  
Public Health Problem ◽  
Domestic Dog ◽  
Canine Leishmaniasis ◽  
Enzyme Linked Immunosorbent Assay ◽  
Igg Antibody ◽  
Human Visceral Leishmaniasis ◽  
Significant Difference

Background and Objective: Human visceral leishmaniasis is endemic in Natal, northeast of Brazil, where the domestic dog is an important parasite reservoir in the infectious cycle of Leishmania spp. In this study, was evaluated the antileishmanial IgG antibody and epidemiological factors related to canine visceral leishmaniasis (CVL). Methods: Sera samples obtained by venipuncture of 1,426 dogs living in areas of human visceral leishmaniasis occurrence were tested for detection of IgG anti-leishmania antibodies with Immunofluorescence Antibody Assay (IFA) and Enzyme Linked Immunosorbent Assay (ELISA). Chi-square (x2) and Odds Ratio (OR) were calculated. Differences were considered statistically significant at p≤0.05. RESULTS: The overall seroprevalence was 10.30% (147/1,426); prevalence increased when the samples were found to be positive at least for one technique ([417/1,426] 29.3%). The high percentage of seroprevalence was observed in Nova República (15.35%), Nova Natal I (12.7%) and Lagoa Azul (11.4%) neighborhoods. In the Planalto, Soledade and Brasil Novo, the infection rates ranged from 7.5 at 8.06%. (p=0.00051). There was neither statistically significant difference between leishmanial infection nor clinical signs of disease (p=0.84; OR=1.0 [0.41; 2.3]), sex (p=0.78, OR=0.94 [0.66; 1.28]); and breed (p=0.92; OR=1.0 [0.65; 1.54]) were observed. Conclusion: The RESULTS suggest that CVL is widely distributed in Natal, may be increasingly urbanizing and will spread through neighborhoods but not endemic, resulting in a serious public health problem, emphasizing the need for epidemiological studies to a greater understanding of the distribution of canine leishmaniasis in these specific areas and contribute proactively to the public health policies.

scholarly journals Systematic Review of Visceral Leishmaniasis in Central Africa

2021 ◽  
pp. 8-20
Author(s):  
Demba Kodindo Israël ◽  
Cheick Amadou Coulibaly ◽  
John C. Beier ◽  
Gunter C. Muller ◽  
Seydou Doumbia
Keyword(s):  
Public Health ◽  
Visceral Leishmaniasis ◽  
Central Africa ◽  
Public Health Problem ◽  
Severe Form ◽  
Canine Leishmaniasis ◽  
Neglected Diseases ◽  
Kala Azar ◽  
Public Health Challenges ◽  
Significant Public Health

In underdeveloped countries, infectious diseases remain one of the most important public health challenges. Visceral leishmaniasis, also known as Kala-azar, is a lethal vector-borne parasitic disease with an increasing number of cases. However, it remains one of the most neglected diseases in the world. It is the most severe form of leishmaniasis and is endemic in 75 countries. Around 95% of the patients live in seven countries: Brazil, Ethiopia, India, Kenya, Somalia, South Sudan, and causes about 20,000-40,000 deaths per year of which 50-70% are children. In Central Africa, this pathology is little known and less documented, making it difficult to access information. We have performed this study to characterize the knowledge on the epidemiology of visceral leishmaniasis in Central Africa. We reviewed the literature on visceral leishmaniasis in Central Africa on the number of reported cases, identified parasites, reservoirs and vectors. The documents consulted came from WHO reports, publications of scientific journals, reports of research institutions and abstracts of scientific conferences consulted online on Pubmed and Google Scholar. The information covers the period from the first reporting of cases in each country until December 2020. The review of the situation of visceral leishmaniasis revealed that it is not a significant public health problem in Central Africa. However, a lot of work remains to be done especially surveillance and research in order to present the exact situation of the disease in this part of the continent. This work would include the underreporting of cases inherent to the weaknesses of the surveillance system in these countries, the clarification of the transmission dynamics of human visceral leishmaniasis, canine leishmaniasis, the identity of parasites and vectors.

scholarly journals Prevalence and Associated Factors of Canine Visceral Leishmaniasis in an Endemic Area of Mato Grosso, Brazil

2018 ◽  
Vol 44 (1) ◽  
pp. 6
Author(s):  
Mahyumi Fujimori ◽  
Arleana Do Bom Parto Ferreira de Almeida ◽  
Álvaro Felipe Lima Ruy Dias ◽  
Juliana Yuki Rodrigues ◽  
Luciano Nakazato ◽  
...  
Keyword(s):  
Risk Factors ◽  
Visceral Leishmaniasis ◽  
Canine Leishmaniasis ◽  
Enzyme Linked Immunosorbent Assay ◽  
Lutzomyia Longipalpis ◽  
Canine Visceral Leishmaniasis ◽  
Prevalence Rates ◽  
Mato Grosso ◽  
Significant Difference ◽  
Endemic Areas

Background: Canine visceral leishmaniasis is a chronic and severe disease of great interest to global public health. In Brazil, the main species causing visceral leishmaniasis is Leishmania chagasi [syn. Leishmania infantum], which is transmitted by sandflies of the species Lutzomyia longipalpis and Lu. cruzi. This study aimed to determine the risk factors and prevalence of visceral leishmaniasis in dogs residing in endemic areas of the municipality of Várzea Grande, Mato Grosso.Material, Methods & Results: The study was conducted in the Várzea Grande neighbourhoods Jardim Eldorado, Parque Sabiá and São Mateus, which are located in the Brazilian Cerrado region and are endemic for visceral leishmaniasis. The Várzea Grande is a mostly commercial and industrial municipality and relies on subsistence farming. To describe the general characteristics of the dog population and housing environment, an interview was carried out with the dog owners in each household. This interview addressed local demographics and the identification of dogs to establish epidemiological aspects of canine illness and risk factors for infection. The dogs were examined and physically restrained for blood collection by jugular venipuncture. For serological testing, a commercial enzyme-linked immunosorbent assay (ELISA) was used. A Chi-square test or Fisher’s exact test was used to identify associations between independent variables and the seroprevalence of dogs with anti-Leishmania antibodies. It were collected blood from 521 animals, including 160 belonging to Jardim Eldorado, 129 to Parque Sabiá and 232 to São Mateus. Of these animals, 120 were reactive by ELISA, with a prevalence of 23.0%. There was no statistically significant difference (P > 0.05) according to gender, age, racial definition, origin, time with family, presence of ectoparasites, or the presence of people with skin wounds at home or on other pets. The major risk factor for canine infection was fur length; dogs with short fur were 2.2 times more likely to be infected than dogs with long fur.Discussion: The prevalence of canine leishmaniasis in endemic areas was found to be similar to studies in Cuiaba, a city in Várzea Grande, which also included neighbourhoods endemic for visceral leishmaniasis as study areas. Other studies have shown prevalence rates that differ from those found in this study. This difference may either be because the neighbourhoods in this study had already experienced outbreaks of the disease or because serum samples were cross-reactive with other trypanosomatids. While infection was more readily detected in dogs with clinical signs, asymptomatic dogs with anti-Leishmania antibodies were found in greater numbers, which is consistent with the literature. Hair length was the only factor associated with canine leishmaniasis in this study; short-haired animals were most at risk of contracting the disease because they had more skin exposure to sandflies during blood feeding. In conclusion, endemic districts of Várzea Grande had high prevalence rates of canine visceral leishmaniasis, and a short length coat was associated with infection.

Epidemiological, clinical and laboratory aspects of human visceral leishmaniasis (HVL) associated with human immunodeficiency virus (HIV) coinfection: a systematic review

Parasitology ◽  
2018 ◽  
Vol 145 (14) ◽  
pp. 1801-1818 ◽  
Author(s):  
Iolanda Graepp Fontoura ◽  
David Soeiro Barbosa ◽  
Antonio Marcus de Andrade Paes ◽  
Floriacy Stabnow Santos ◽  
Marcelino Santos Neto ◽  
...  
Keyword(s):  
Public Health ◽  
Systematic Review ◽  
Human Immunodeficiency Virus ◽  
Visceral Leishmaniasis ◽  
Public Health Problem ◽  
Control Measures ◽  
High Morbidity ◽  
Human Visceral Leishmaniasis ◽  
Hiv Coinfection ◽  
Immunodeficiency Virus

AbstractCoinfection with human visceral leishmaniasis (HVL) and human immunodeficiency virus (HIV) has become an emerging public health problem in several parts of the world, with high morbidity and mortality rates. A systematic review was carried out in the literature available in PubMed, Scielo and Lilacs related to HVL associated with HIV coinfection, seeking to analyze epidemiological, clinical and laboratory aspects. Of the 265 articles found, 15 articles were included in the qualitative analysis, which referred to the results of HVL treatment in patients coinfected with HIV. In the published articles between 2007 and 2015, 1171 cases of HVL/HIV coinfection were identified, 86% males, average age 34 years, liposomal amphotericin B was the most commonly used drug, cure rates 68 and 20% relapses and 19% deaths, five different countries, bone marrow was used in 10/15 manuscripts. HVL/HIV coinfection is a major challenge for public health, mainly due to the difficulty in establishing an accurate diagnosis, low response to treatment with high relapse rates and evolution to death. In addition, these two pathogens act concomitantly for the depletion of the immune system, contributing to worsening the clinical picture of these diseases, which requires effective surveillance and epidemiological control measures.

scholarly journals Infectious Diarrhea, a Public Health Problem in Population

2021 ◽  
Vol 4 (2) ◽  
pp. 01-04
Author(s):  
Deac Monica
Keyword(s):  
Public Health ◽  
Health Problem ◽  
Acute Diarrhea ◽  
Clinical Signs ◽  
Public Health Problem ◽  
Gastrointestinal Diseases ◽  
Public Health Issue ◽  
Diarrheal Diseases ◽  
Salmonella Spp ◽  
Diarrheal Illness

Infec­tious etiology in acute diarrhea, referred several gastrointestinal diseases, Most are gastroenteri­tis associated with clinical signs and symptoms including: nausea, vomiting, abdomi­nal pain and cramps, bloating, flatulence, fever, passage of bloody stools, tenesmus, and fecal ur­gency disorders. Diarrheal illness is a large worldwide public health problem, with substantial regional variation, in the prevalence of medical signs by being caused by specific pathogens. Infectious diarrheal diseases, are the second leading cause of morbidity and mortality worldwide and can cause real public health concerns. Such diarrhea was studied as a medical disorder, in a 3 years period, 2017 to 2020, in Transylvania a large region in Romania. It was found there, 3577 number of diarrheal diseases cases, appeared almost during July to August. The case incidence for the disease arrived at 65%, in the entire summer season. The cases data were transmitted by 12 district Sanitary Polices, to the Public Health Center Cluj. Cases were almost diagnosed by the family doctors of the region, in more then 50%. Few of this have need some days of hospitalization, because of several disease disorders, in which case it was used a specific adequate fluid and electrolyte replacement as key of the treatment, for managing diarrheal illnesses. Even so, 3 children under 5 years age died, because of severe complications. It was remarked so, organic failed who was estimate to be the cause of their deaths. Clinical and epidemiological evaluations were done and even defined the severity and type of this mentioned illnesses. The detected infectious etiology for the acute diarrheas, where determined in authorized Microbiology laboratories, where were identified: Shigella spp, Salmonella spp, Campylobacter spp, Yersinia spp, Rotavirus, Giardia. Most number of cases appeared in children, being suggestive in 63%, followed by elderly or adult people in 17% each. Acute diarrheal illness had to be considered a major public health issue, against which some determined control efforts are needed. Public health surveillance of infectious acute diarrhea, includes obligatory done strategies for a correct infection control.

scholarly journals Kinetics of IgG Antibodies in Previous Cases of Dengue Fever—A Longitudinal Serological Survey

2020 ◽  
Vol 17 (18) ◽  
pp. 6580
Author(s):  
Qilin Wu ◽  
Qinlong Jing ◽  
Xiujuan Wang ◽  
Lili Yang ◽  
Yilan Li ◽  
...  
Keyword(s):  
Dengue Fever ◽  
Antibody Level ◽  
Southern China ◽  
Enzyme Linked Immunosorbent Assay ◽  
Igg Antibodies ◽  
Igg Antibody ◽  
Related Factors ◽  
Factors Affecting ◽  
Serological Investigation ◽  
Significant Difference

Guangzhou is believed to be the most important epicenter of dengue outbreaks in southern China. In this study, a longitudinal serological investigation of previous cases of dengue fever in Guangzhou was conducted to explore the persistence of IgG antibodies and related factors affecting the changes of antibody level. We recruited 70 dengue virus type 1 (DENV-1) primary infection cases at two years post infection for serological investigation and conducted a second follow-up in the 5th year of prognosis. An enzyme-linked immunosorbent assay (ELISA) for DENV IgG antibody was examined in all study subjects. Potential factors associated with the concentration of serum total IgG antibody were determined by the generalized estimation equation (GEE). No significant difference in serum total IgG antibody positive rate between two follow-ups was observed (χ2 = 3.066, p = 0.080). However, there was a significant difference in the concentration of serum total IgG antibody between the two follow-ups (Z = 7.154, p < 0.001). The GEE showed that the antibody level in the five-year prognosis was mainly affected by the antibody level in the two-year prognosis (OR: 1.007, 95%CI: 1.005–1.009). In conclusion, the serum IgG antibodies of previous dengue fever cases can persist for a long time.

scholarly journals Serological Response to Pasteurella multocida NanH Sialidase in Persistently Colonized Rabbits

2004 ◽  
Vol 11 (5) ◽  
pp. 825-834 ◽  
Author(s):  
Susan Sanchez ◽  
Shaikh Mizan ◽  
Charlotte Quist ◽  
Patricia Schroder ◽  
Michelle Juneau ◽  
...  
Keyword(s):  
Pasteurella Multocida ◽  
Respiratory Infections ◽  
Clinical Signs ◽  
Circulatory System ◽  
Immunoglobulin M ◽  
Enzyme Linked Immunosorbent Assay ◽  
Serological Response ◽  
Igg Antibody ◽  
Sialidase Activity ◽  
Upper Respiratory

ABSTRACT Pasteurella multocida is a mucosal pathogen that colonizes the upper respiratory system of rabbits. Respiratory infections can result, but the bacteria can also invade the circulatory system, producing abscesses or septicemia. P. multocida produces extracellular sialidase activity, which is believed to augment colonization of the respiratory tract and the production of lesions in an active infection. Previously, it was demonstrated that some isolates of P. multocida contain two unique sialidase genes, nanH and nanB, that encode enzymes with different substrate specificities (S. Mizan, A. D. Henk, A. Stallings, M. Meier, J. J. Maurer, and M. D. Lee, J. Bacteriol. 182:6874-6883, 2000). We developed a recombinant antigen enzyme-linked immunosorbent assay (ELISA) based on the NanH sialidase of P. multocida and demonstrated that rabbits that were experimentally colonized with P. multocida produce detectable anti-NanH immunoglobulin M (IgM) and IgG in serum, although they demonstrated no clinical signs of pasteurellosis. In addition, clinically ill pet rabbits infected with P. multocida possessed IgM and/or IgG antibody against NanH. The NanH ELISA may be useful for the diagnosis of P. multocida infections in sick rabbits as well as for screening for carriers in research rabbit colonies.

scholarly journals Development of Vaccines against Visceral Leishmaniasis

2012 ◽  
Vol 2012 ◽  
pp. 1-14 ◽  
Author(s):  
Krystal J. Evans ◽  
Lukasz Kedzierski
Keyword(s):  
Public Health ◽  
Visceral Leishmaniasis ◽  
Leishmania Donovani ◽  
Clinical Symptoms ◽  
Public Health Problem ◽  
Past Infection ◽  
Health Goal ◽  
Disability Adjusted Life ◽  
Life Years ◽  
Public Health Goal

Leishmaniasis is a neglected disease resulting in a global morbidity of 2,090 thousand Disability-Adjusted Life Years and a mortality rate of approximately 60,000 per year. Among the three clinical forms of leishmaniasis (cutaneous, mucosal, and visceral), visceral leishmaniasis (VL) accounts for the majority of mortality, as if left untreated VL is almost always fatal. Caused by infection withLeishmania donovaniorL. infantum, VL represents a serious public health problem in endemic regions and is rapidly emerging as an opportunistic infection in HIV patients. To date, no vaccine exists for VL or any other form of leishmaniasis. In endemic areas, the majority of those infected do not develop clinical symptoms and past infection leads to robust immunity against reinfection. Thus the development of vaccine forLeishmaniais a realistic public health goal, and this paper summarizes advances in vaccination strategies against VL.

scholarly journals Echinococcus granulosusPrevalence in Dogs in Southwest Nigeria

2014 ◽  
Vol 2014 ◽  
pp. 1-5 ◽  
Author(s):  
Oyeduntan Adejoju Adediran ◽  
Temitope Ubaidat Kolapo ◽  
Emmanuel Chibuike Uwalaka
Keyword(s):  
Public Health ◽  
Canis Familiaris ◽  
Domestic Dogs ◽  
Enzyme Linked Immunosorbent Assay ◽  
Parasitic Disease ◽  
Companion Dogs ◽  
Total Prevalence ◽  
Significant Difference ◽  
Southwest Nigeria ◽  
Cystic Hydatid

Echinococcosis is a public health parasitic disease that is cosmopolitan (Echinococcus granulosus) in its distribution. Domestic dogs (Canis familiaris) have been recognised as the definitive host of the parasite. The present study was carried out to determine the prevalence of canine echinococcosis in Southwest Nigeria using direct enzyme linked immunosorbent assay (ELISA) to detect sera antigen. Two hundred and seventy-three (273) canine sera were tested for the presence ofEchinococcusantigen. Purpose of keeping (hunting or companion), age (young or adult), and sex of each dog were considered during sampling. Total prevalence recorded was 12.45% (34/273). There was significant difference (P<0.05) between hunting (15.94%) and companion dogs (1.52%) but there was no significant difference (P>0.05) between young and adult dogs. There was no association between sex and prevalence of canine echinococcosis. The result of this study established the presence of canine echinococcosis in Southwest Nigeria; thus there is the possibility of occurrence of zoonotic form of the disease (human cystic hydatid diseases) in the region.

scholarly journals Insights from mathematical modelling and quantitative analysis on the proposed WHO 2030 targets for visceral leishmaniasis on the Indian subcontinent

2019 ◽  
Vol 3 ◽  
pp. 1651
Author(s):  
Keyword(s):  
Public Health ◽  
Visceral Leishmaniasis ◽  
Health Problem ◽  
Indian Subcontinent ◽  
Public Health Problem ◽  
District Level ◽  
World Health ◽  
Kala Azar ◽  
Health Organization ◽  
The Impact

Visceral leishmaniasis (VL) is a neglected tropical disease (NTD) caused by Leishmania protozoa that are transmitted by female sand flies. On the Indian subcontinent (ISC), VL is targeted by the World Health Organization (WHO) for elimination as a public health problem by 2020, which is defined as <1 VL case (new and relapse) per 10,000 population at district level in Nepal and sub-district level in Bangladesh and India. WHO is currently in the process of formulating 2030 targets, asking whether to maintain the 2020 target or to modify it, while adding a target of zero mortality among detected cases. The NTD Modelling Consortium has developed various mathematical VL transmission models to gain insight into the transmission dynamics of VL, identify the main knowledge gaps, and predict the feasibility of achieving and sustaining the targets by simulating the impact of varying intervention strategies. According to the models, the current target is feasible at the appropriate district/sub-district level in settings with medium VL endemicities (up to 5 reported VL cases per 10,000 population per year) prior to the start of the interventions. However, in settings with higher pre-control endemicities, additional efforts may be required. We also highlight the risk that those with post-kala-azar dermal leishmaniasis (PKDL) may pose to reaching and sustaining the VL targets, and therefore advocate adding control of PKDL cases to the new 2030 targets. Spatial analyses revealed that local hotspots with high VL incidence remain. We warn that the current target provides a perverse incentive to not detect/report cases as the target is approached, posing a risk for truly achieving elimination as a public health problem although this is taken into consideration by the WHO procedures for validation. Ongoing modelling work focuses on the risk of recrudescence when interventions are relaxed after the elimination target has been achieved.

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