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PubMed1980

Serological studies on leptospirosis in domestic animals in Quebec.

During a period of 30 months, from January 1977 to June 1979, Leptospira agglutinins were detected in 355 (6%) of 5841 bovine sera, 52 (10.1%) of 511 porcine sera, one (5%) of 20 equine sera and one (12.5%) of eight canine sera. Bovine, porcine and equine sera reacted predominantly with L. pomona. Reactors to L. hardjo/sejroe, L. icterohaemorrhagiae and L. grippotyphosa were also detected in cattle. One porcine serum reacted with L. grippotyphosa and one canine serum with L. icterohaemorrhagiae. Al the sera originated from suspected cases of leptospirosis.

Animals↗
PubMed1980

Leptospirosis.

Leptospirosis is not one specfic disease, as may be thought, but a series of separate diseases, each with distinct clinical features. Although uncommon, it is not a rare disease, and it can occur in pet owners, those in the livestock industry, and agricultural workers.

Agricultural Workers' Diseases↗
PubMed1980

[Leptospirosis and environment (author's transl)].

Occupational groups are divided into two groups: 1. Direct contact with animals (14 per cent): veterinary work, hunting, slaughtering, butchers and pork-butchers' work. 2. Contact with natural environment. Transmission is indirect, through water, aquatic environment: stall-keepers, drivers dealing with dumping grounds, scavengers, persons working underground, in cellars, sewers, and particularly agricultural workers, market-gardeners, cattle raisers; bathers and anglers who have direct contact with water. This mode of transmission: rural areas, agriculture, is recorded in 38 per cent of the cases. Contamination through water represents 27 per cent. Leptospiral diseases occur in 4/5 of the cases when Man is in contact with Nature. In most cases, 86 per cent, Leptospirosis is an environmental disease caused by wet ground, aquatic environment.

Environment↗
PubMed1993

Leptospirosis surveillance: 1990-1992.

Leptospirosis remains a potential hazard to farmers, agricultural workers and those coming into contact with rats or natural inland waters. The annual reported incidence in England and Wales ranged between 29 and 48 cases during 1990-92.

England↗
PubMed1994

[Zoonoses in Vojvodina. III. Results of a seroepidemiologic study of leptospirosis in Vojvodina].

2697 persons professionally exposed to leptospira working in contaminated waters and grounds or due to contact with infected animals or their products were seroepidemiologically examined. It was established that the presence of leptospirosis in certain categories of examined persons is three to more than ten times higher in relation with it's presence in the control groups. The most frequent serotype was Leptospira pomona. None of the seropositive persons gave data about having leptospirous infection which might be the consequence of asymptomatic infection or unidentified and not registering of the clinically manifested diseases.

Adolescent↗
PubMed1995

[Leptospirosis].

Leptospirosis is a worldwide zoonosis. When human beings are infected the clinical spectrum varies from a mild, febrile illness to severe, icteric disease with multiorgan failure and fatal outcome. The illness falls into two phases, the septicaemic and the so-called immune. The diagnosis is confirmed by culture of blood and spinal fluid during the first phase, by culture of urine during the second and by serology. It is recommended that penicillin be given as quickly as possible. Prevention is important e.g. effective rat control and individual protection such as wearing protective clothing in contaminated work areas.

Animals↗
PubMedDate not supplied

[The use of an indirect immunoenzyme method in the diagnosis of leptospirosis].

Sensitivity and specificity of indirect immunoenzyme method for determining antileptospirosis antibodies have been studied. Supersound antigenic preparations are used as antigens. Determination of genus-specific antibodies and antibodies of more narrow specificity including serogroup specific ones is possible in the elaborated test. A spectrum of revealed serogroup specific antibodies expends in patients with leptospirosis when using polyvalent antigenic preparations.

Antibodies, Bacterial↗
PubMed1994

Pathologic-clinical characterization of leptospirosis in a golden Syrian hamster model.

Experimental leptospirosis was reproduced in golden Syrian hamsters (Mesocricetus aureatus). Evaluation of three Leptospira serogroups (canicola, icterohaemorrhagiae and pomona) was carried out regarding their virulence, production of symptoms and lethal activity. Macroscopic and microscopic studies of tissue lesions were also made. Animals were inoculated with 3.75 x 10(6) to 6 x 10(7) bacteria through the intraperitoneal (IP) route. The clinical development of the disease in Syrian hamsters was characterized by the presence of general symptoms between the third and fifth day after inoculation. With highly virulent strains, the distinctive clinical picture occurred and death followed before the seventh day. The strain of the pomona serogroup proved to be more virulent than those of the other serogroups and produced the most florid picture of the disease. Pathogenic aspects of this process were also studied.

Animals↗
PubMed1975

Leptospirosis in Ethiopia: a serological survey in domestic and wild animals.

Seven hundred and fifty-eight serum samples from domestic and wild animals in Ethiopia were tested for leptospiral antibodies by the microscopic agglutination test. The following percentages of seropositivity were obtained: horse (91.3 per cent), cow (70.7 per cent), pig (57.1 per cent), goat (47.3 per cent), sheep (43.4 per cent), camel (15.4 per cent), and dog (8.3 per cent). All 54 samples from birds and wild animals were seronegative. Most of the positive sera exhibited reaction to more than one serotype and antibodies to serotype butembo were predominant in sera of the majority of the examined species. However, grippotyphosa, rather than butembo was the predominant reacting serotype in camels and dogs. It is concluded that leptospirosis is of significant prevalence in domestic animals in Ethiopia and may constitute an occupational health hazard to man.

Agglutination Tests↗
PubMed1994

[Leptospirosis in Pomurje and Slovenia].

In Pomurje leptospirosis is endemic. During the years 1964-1985 there were 407 leptospiral cases reported in Slovenia, 366 of which were in Pomurje. Inclusion in this study required indication of leptospirae with a fourfold increase of the titer of antibodies or the isolation of leptospirae from hemocultures. In Pomurje in this period 214 men (58.47%) and 152 women (41.53%) were infected. The average morbidity rate was 12.75/100,000 inhabitants. The highest rate was in the country of Lendava (23.14/100,000). Ten serotypes were confirmed: grippotyphosa in 122 (33.33%) of the patients, sejroe in 91 (24.86%), icterohaemorrhagie in 50 (13.66%), saxkoebing in 48 (13.11%), australis in 47 (12.84%), canicola and pomona in two cases, tarassovi and autumnalis in one patient. In one case, the serotype could not be differentiated. The disease occurs throughout the years. In contrast to Western Europe in Pomurje there exists a much larger percent of infected women and a high percentage among the elderly. Two patients have died (mortality rate is 0.55%). One of them succumbed on the 5th day of infection due to massive bleeding in the heart and other organs. The other died on the 12th day under the influence of a severe Weil's syndrome.

Female↗
PubMed1993

[3 pediatric cases of leptospirosis].

Three children presented with an association of pains, infectious syndrome, acute renal failure, hepatitis and meningitis, that lead to the diagnosis of leptospirosis. The clinical spectrum of this rare disease are recalled.

Adolescent↗
PubMed1993

[The type of leptospirosis epidemic and serogroup transformation in Fujian province in recent years].

By analysis of investigations in recent years in Fujian province, it was found that the main type of leptospirosis epidemic was rice-field type, the other was flood type which had the tendency to shift from coastal plain area to northwest area. In the main epidemic area, Wupin county, the detection rate of Hebdomadis serogroup rate sharply declined (P < 0.01), however, that of Batavia serogroup markedly increased (P < 0.01).

Animals↗
PubMed1996

Prevalence of sand fly fever, West Nile, Crimean-Congo hemorrhagic fever, and leptospirosis antibodies in Pakistani military personnel.

To determine the prevalence of antibodies to viral diseases known or suspected to be present in Pakistan, we studied 570 sera from three groups of adults; two of the groups were involved in outbreaks of hepatitis, and the third included men admitted to a hospital for evaluation of febrile illnesses. Immunoglobulin G antileptospiral antibody was found in 1 to 6% of the subjects, with the highest rate in enlisted military personnel hospitalized for febrile illness. One man in the group with febrile illness had significantly elevated immunoglobulin M antileptospiral antibody titers. However, in a group of recruits experiencing suspected non-A, non-B hepatitis, 19 (11%) of 173 had a 4-fold rise in immunoglobulin M antibody to leptospirosis. Antibody to sand fly fever viruses was found in 27 to 70%. Antibody to West Nile virus was present in 33 to 41% of subjects. Antibody reactive with Japanese encephalitis virus was present in 25%, but plaque reduction neutralization tests suggested this to be cross-reaction with West Nile virus. All 212 specimens tested for antibody to Crimean-Congo hemorrhagic fever and Hantaan viruses were negative. This study indicates that diseases known to be prevalent in other areas of southwest Asia and the Middle East are also prevalent in northern Pakistan and may impact on those traveling or working in this area.

Adolescent↗
PubMed1995

[Leptospirosis in slaughter cattle--serologic and bacterial study].

Antibodies to leptospiras were demonstrated in 91 cases (7.4%) out of 1,239 animals examined by serological assays of blood sera of cattle slaughtered in slaughter-houses and coming from 21 farms of one district. The antibodies were detected in animals coming from eleven out of the farms investigated (52.4%). The most frequent reactions were proved with leptospiras of the serovar L. grippotyphosa (61.8%) and with leptospiras of the serological group Sejroe (18.9%), rarely with leptospiras of the serovar L. icterohaemorrhagiae or copenhageni (5.7%). Antibodies to leptospiras of other serovars (L. canicola, L. bulgarica and L. hardjo) were demonstrated only as coagglutionations with the above-mentioned leptospira serovars. We failed to demonstrate leptospiras in the animals examined by culture examinations as well as by bacterioscopy. The results of examinations have shown that the cattle on Czech farms is also exposed to infections by various serovars of leptospiras. The infections are not accompanied by manifest clinical symptoms in many cases nor do they cause significant elimination of leptospiras in urine in the serologically positive animals. On the Czech cattle farms the occurrence of antibodies to leptospiras of the serovar L. grippotyphosa is prevailing; this serovar seems not to be expressly pathogenic to cattle and does not cause the formation of anthropurgic foci. Reduction in the occurrence of antibodies to leptospiras of this type is possible to achieve by preventing the contact with natural foci of this type. Hence the prognosis of epizootologic situation in bovine leptospirosis in the conditions of this country is relatively favorable. But special attention should be paid to animals bought and imported from foreign countries. These animals could be a source of some highly pathogenic serovars of leptospiras to cattle.

Animals↗
PubMedDate not supplied

[The epidemiological and epizootiological characteristics of leptospirosis in the Republic of Sakha (Yakutia)].

Among zoonotic infections with natural foci in the Republic of Sakha (Yakutia), leptospiroses have assumed greater importance. Their morbidity is sporadic, mainly afflicting rural adults. The serogroups pomona, grippotyphosa, and icterohaemorrhagiae are prevalent in the etiological structure of leptospiras. An epizootiological survey has revealed natural and anthropurgic leptospirosis foci which present a hazard primarily to rural inhabitants who deal with animal husbandry, fur-bearer breeding, hunting, and fishing. The vole (Microtis) and root vole (Microtis oeconomus) serve as the major reservoir and source of leptospiroses in the natural foci, while cattle and caged Arctic foxes do in the anthropurgic ones. High sizes of house and grey mice which are carriers of the Leptospira javanica and icterohaemorrhagiae, have been recorded in the residential and domestic constructions of localities. A complex of antileprospirotic measures that limits the influence of the leading factors of infection transmission and the risk of human infection is substantiated.

Adult↗
PubMed1995

[Study on geographical distribution of leptospirosis in China].

Since 1955, Leptospirosis has been recognized as a notifiable infectious disease in China. According to the data gathered from 26 provinces of China (except for Taiwan) in 1955-1993, the average morbidity and mortality were 7.08/10(5) and 1.02% respectively. Distribution of the disease involved 26 provinces in China (not including Taiwan). The trend of the disease has been steady for recent years but outbreaks occasionally occurred, especially in several southern provinces of China. Potential risk factors may exist in these areas. Distribution of endemic areas of this disease is located between 25 degrees-35 degrees latitude and 100 degrees-120 degrees longitude i, e. those provinces along with drainage areas of the Yangtze River and the Huaihe River.

China↗