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Prevalence, hematology...

Characteristic

Dog

1

2

3

4

5

6

7

8

9

N

RBC (x10 6)

4.88

5.27

3.90

5.79

5.17

6.27

3.72

6.69

5.85

5.5-8.5

Hemoglobin (g/l)

10.4

12.2

8.74

12.5

12.6

12.9

9.20

15.1

13.2

12-18

Hematocrit (%)

28.8

33.7

23.4

33.8

34.4

36.0

24.2

40.0

37.0

37-55

MCV (fl)

58.9

63.8

60.0

58.3

66.7

57.4

65.1

59.7

63.8

60-77

MCH (pg)

21.4

23.2

22.4

21.7

24.3

20.6

24.7

22.5

22.7

19-23

MCHC(g/dl)

36.2

36.4

37.4

37.1

36.5

35.8

38.0

37.5

35.7

32-36

WBC (µl)

13400

6830

9360

10200

5920

6980

14700

8700

18200

6000-17000

Neutrophils (µl)

9910

5440

5660

7120

3080

6190

11100

5800

8500

3000-11500

Lymphocytes(µl)

2480

1360

2690

3060

2510

342

3050

3000

1200

1000-4000

Monocytes (µl)

937

250

995

420

322

376

312

300

200

100-1350

Eosinophils (µl)

390

80

110

120

4

15

183

500

100

100-1250

Table 1. Hemograms of dogs naturally infected by Hepatozoon canis in São Paulo State

Hepatozoon canis infection was detected in 13 dogs (5.9%), eight males and five females. Ten dogs were from Boituva and three from Botucatu. In addition to H. canis, Babesia canis was presented in five dogs and Ehrlichia canis was found in two dogs. One dog had concurrent infection with H. canis and E. canis.

Of 13 experimentally infected dogs, nine, infected only with H. canis, had blood samples taken to perform the hematological and biochemical tests. The results are listed in Tables 1 and 2. Only three dogs had anemia and another dog had leucocytosis. The only alteration observed in serum biochemistry was hyperglobulinemia.

RBC= red blood cells; MCV= mean corpuscular volume; MCH= Mean corpuscular hemoglobin; MCHC= hemoglobin concentration; WBC= white blood cells; N= normal range (Feldman et al., 2000).

mean corpuscular

1

2

3

4

5

6

7

8

9

49.2

33.6

60.0

25.2

48.0

34.8

38.4

42.0

45.6

0.8

1.0

1.6

0.8

0.7

0.8

1.1

1.1

1.1

113.0

109.0

78.6

234.0

104.8

37.7

131.0

68.8

135.1

6.8

6.3

25.0

14.7

15.2

13.1

34.0

24.6

9.4

6.0

8.0

13.0

7.0

3.0

2.0

2.0

11.0

10.0

2.0

3.1

4.2

2.0

6.0

2.0

4.1

4.1

5.1

12.0

12.4

12.2

15.0

11.6

11.6

15.2

11.6

9.2

1.4

3.4

2.9

3.3

3.3

2.3

3.1

3.0

3.1

10.6

9.0

9.3

11.7

8,3

9.3

12.1

8.6

6.1

9.7

2.4

2.4

4.9

7.3

2.4

4.0

2.4

2.4

Table 2. Serum biochemistries of dogs naturally infected by Hepatozoon canis in São Paulo State

detected. The dogs from Boituva, a county with a large rural area, showed the highest occurrence of infected dogs (76.9% 10 of 13 infected dogs). In Diadema, which is the most urban of all studied cities, no infected dogs were detected.

The H. canis-infected animals did not show important changes in blood characteristics, as detected by hematology and serum biochemistry. Three dogs had anemia, which is a common finding of H. canis infection (Baneth et al., 1995; Gondim et al., 1998), although it is also frequent

N

    • 21.4

      -59.92

    • 0.5

      -1.5 20-156

    • 4.8

      -24

    • 6.2

      ±13.0

    • 1.2

      -6.4

    • 5.4

      -7.1

    • 2.6

      -3.3

    • 2.7

      -4.4

    • 1.15

      -28.40

H. canis infection rate was low (5.9%), similar to the results found on urban dogs in other cities of Brazil (Massard, 1979; Gondim et al., 1998). A study performed in rural areas of Rio de Janeiro State revealed a very high prevalence (39.2%) reaching 60% of H. canis-infected dogs in some regions (O’Dwyer et al., 2001).

In this study, the real origin of the animals could not be established but most probably came from urban areas, where the captures took place, explaining the low number of infected dogs

Characteristic

Dog

Urea (mg/dl) Creatinine (mg/dl) AP (IU/l) ALT (IU/l) AST (IU/l) GGT (IU/l) PTN (g/dl) Albumin (g/dl) Globulin (g/dl) CK (IU/l)

AP= alkaline phosphatase; PTN= serum protein; CK= creatine kinase; N= normal range (Kaneko et al., 1997).

Arq. Bras. Med. Vet. Zootec., v.58, n.4, p.688-690, 2006

689

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