scholarly journals Canine heartworm disease in Porto Velho: first record, distribution map and occurrence of positive mosquitoes

2013 ◽  
Vol 22 (4) ◽  
pp. 559-564 ◽  
Author(s):  
Guilherme Maerschner Ogawa ◽  
Edson Neves da Cruz ◽  
Príscila Nayara Araújo Cunha ◽  
Luís Marcelo Aranha Camargo
Keyword(s):  
Disease Transmission ◽  
Pulmonary Nodules ◽  
First Record ◽  
Blood Samples ◽  
Canine Heartworm ◽  
Blood Smears ◽  
Canine Heartworm Disease ◽  
Heartworm Disease ◽  
The City ◽  
Porto Velho

The aim of this study was to make the first report on canine heartworm disease in the state of Rondônia and confirm its transmission in this state. Blood samples were randomly collected from 727 dogs in the city of Porto Velho. The samples were analyzed to search for microfilariae and circulating antigens, using three different techniques: optical microscopy on thick blood smears stained with Giemsa; immunochromatography; and PCR. Mosquitoes were collected inside and outside the homes of all the cases of positive dogs and were tested using PCR to search for DNA of Dirofilaria immitis. Ninety-three blood samples out of 727 (12.8%) were positive according to the immunoassay technique and none according to the thick smear method. Among the 93 positive dogs, 89 (95.7%) were born in Porto Velho. No difference in the frequency of infection was observed between dogs raised indoors and in the yard. PCR on the mosquitoes resulted in only one positive pool. This result shows that the transmission of canine heartworm disease is occurring in the city of Porto Velho and that there is moderate prevalence among the dogs. The techniques of immunochromatography and PCR were more effective for detecting canine heartworm than thick blood smears. The confirmation of canine heartworm disease transmission in Porto Velho places this disease in the ranking for differential diagnosis of pulmonary nodules in humans in Rondônia.

Seroprevalence of heartworm (Dirofilaria immitis) in feline and canine hosts from central and northern Portugal

2014 ◽  
Vol 89 (5) ◽  
pp. 625-629 ◽  
Author(s):  
L. Vieira ◽  
A.C. Silvestre-Ferreira ◽  
A.P. Fontes-Sousa ◽  
A.C. Balreira ◽  
R. Morchón ◽  
...  
Keyword(s):  
Dirofilaria Immitis ◽  
Clinical Signs ◽  
Differential Diagnoses ◽  
Blood Samples ◽  
Canine Heartworm ◽  
Northern Portugal ◽  
Canine Heartworm Disease ◽  
Heartworm Disease

AbstractDirofilaria immitis is endemic in Portugal. Several studies have reported the presence of canine heartworm disease, although no previous studies on feline infections have been published. The aim of this study was to determine the prevalence of D. immitis in cats and dogs from central and northern Portugal. Blood samples from 434 cats were tested for circulating anti-D. immitis and anti-Wolbachia antibodies. Furthermore, 386 dogs were tested for circulating D. immitis antigens. Overall feline seroprevalence was 15%, while canine prevalence was 2.1%. The highest feline seroprevalences of 18.7% and 17.6% were found in Aveiro and Viseu, respectively, while the highest canine prevalences of 8.8% and 6.8% were found in Coimbra and Aveiro, respectively. Cats and dogs showing respiratory signs presented higher prevalences of 24.4% and 17%, respectively, while 50% of cats with gastrointestinal signs were seropositive. The present study confirms the seropositivity of D. immitis in the feline population in central and northern Portugal, and suggests the importance of including heartworm disease in the list of differential diagnoses of cats and dogs showing clinical signs compatible with the disease.

scholarly journals Frequency of canine heartworm disease (D. immitis) in some regions of São Paulo State using a circulating antigen indicator test

2001 ◽  
Vol 53 (3) ◽  
pp. 321-325 ◽  
Author(s):  
N.F. Souza ◽  
M.H.M.A Larsson
Keyword(s):  
Coastal Area ◽  
Sao Paulo ◽  
São Paulo ◽  
Canine Heartworm ◽  
Paulo State ◽  
Canine Heartworm Disease ◽  
Heartworm Disease ◽  
Circulating Antigen ◽  
São Paulo State ◽  
The City

The frequency of canine heartworm disease was determined in 310 dogs (158 males and 152 females) from São Paulo city (154) and several towns along the São Paulo state coast (156). The survey was carried out through the Knott's technique (direct presence of microfilariae in the blood) and ELISA for soluble circulating antigen detection. Twenty five (8.0%) samples were positive to D. immitis using both methods being 6 dogs (3.9%) from the city and 19 (12.2%) from the coastal area. Nineteen dogs (6.1%) were positive to the Knott's technique (4 from the city and 15 from the coastal area) and 12 dogs (3.9%) to the ELISA (4 from the city and 8 from the coastal area); six dogs (1.9%) were positive for both methods being two from the city and four from the coastal area. The frequency of positive dogs by the Knott's technique in the coastal area was higher than that in São Paulo city (P<0.05), but equivalent frequency was found in dogs from both areas when the ELISA test was used. Higher number of dogs with a patent infection (microfilaremic) was found than those with occult infection (amicrofilaremic). This survey has shown that the dogs were not infected with high frequency probably because the studied areas were not hiperenzootic endemic (higher than 10% of frequency).

An investigation of the role of immunologic factors in anemia associated with canine heartworm disease

1984 ◽  
Vol 7 (3-4) ◽  
pp. 285-292 ◽  
Author(s):  
L.L. Werner ◽  
R.E.W. Halliwell ◽  
R.F. Jackson ◽  
T.C. Needham ◽  
M. Limpach
Keyword(s):  
Canine Heartworm ◽  
Canine Heartworm Disease ◽  
Heartworm Disease ◽  
Immunologic Factors

Seroprevalence of canine heartworm disease (Dirofilaria immitis) on Tenerife Island: an epidemiological update

2006 ◽  
Vol 100 (1) ◽  
pp. 103-105 ◽  
Author(s):  
J. A. Montoya ◽  
M. Morales ◽  
M. C. Juste ◽  
A. Bañares ◽  
F. Simon ◽  
...  
Keyword(s):  
Dirofilaria Immitis ◽  
Canine Heartworm ◽  
Canine Heartworm Disease ◽  
Heartworm Disease ◽  
Tenerife Island

scholarly journals STUDY OF THE PREVALENCE OF Capillaria hepatica IN HUMANS AND RODENTS IN AN URBAN AREA OF THE CITY OF PORTO VELHO, RONDÔNIA, BRAZIL

2015 ◽  
Vol 57 (1) ◽  
pp. 39-46 ◽  
Author(s):  
Elierson José Gomes da Rocha ◽  
Sérgio de Almeida Basano ◽  
Márcia Maria de Souza ◽  
Eduardo Resende Honda ◽  
Márcio Botelho de Castro ◽  
...  
Keyword(s):  
Urban Area ◽  
Histopathological Examination ◽  
Blood Samples ◽  
Specific Antibodies ◽  
Capillaria Hepatica ◽  
First Case ◽  
Calodium Hepaticum ◽  
True Infection ◽  
The City ◽  
Porto Velho

Introduction: Hepatic capillariosis, caused by Capillaria hepatica (Calodium hepaticum) (Bancroft, 1893), Travassos, 1915 (Nematoda, Trichinelloidea, Capillariidae), is a common zoonosis in rodents but is rare in humans. Seventy-two cases in humans have been reported worldwide since the first case was described by MACARTHUR in 192417,27. This study aimed to determine the prevalence of Capillaria hepatica in humans and rodents in an urban area of Porto Velho, the capital of Rondônia, in Brazil. Methods: After conducting a census of the area, 490 residents were randomly selected, and, after signing a term of consent, provided blood samples that were screened for anti-Capillaria hepatica antibodies. Simultaneously, rats were captured to assess the prevalence of this parasite in rodents by histopathological examination in liver sections. Results: A prevalence of 1.8% was found among residents who had specific antibodies at a dilution of 1:150, indicating exposure to parasite eggs; 0.8% of the subjects also had positive titers at a dilution of 1:400, indicating true infection. The prevalence in rats was 2%. Conclusions: The prevalence of infection with this parasite among humans and rats was low. While the prevalence encountered among humans was within the limits reported in the literature, the prevalence among rodents was much lower.

The validity of some haematological and elisa methods for the diagnosis of canine heartworm disease

1996 ◽  
Vol 20 (4) ◽  
pp. 331-339 ◽  
Author(s):  
M. Martini ◽  
G. Capelli ◽  
G. Poglayen ◽  
F. Bertotti ◽  
C. Turilli
Keyword(s):  
Canine Heartworm ◽  
Canine Heartworm Disease ◽  
Heartworm Disease
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