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Application of ultrasound contra infection with secondary hydatidosis in mice

    Baraa B. Ramdan Asmaa A. Ali

Iraqi Journal of Veterinary Sciences, 2020, Volume 34, Issue 2, Pages 397-403
10.33899/ijvs.2019.126132.1240

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Abstract

The present research explained the impact of ultrasound on the viability of Echinococcus granulosus protoscolices in vitro application of fixed frequency waves at 20000 pulse/sec and 1.8 w/cm2, with different exposing periods, thirty, twenty, fifteen, twelve, ten and five seconds respectively, subsequently prevention of mice against interjected with minor hydatid cysts, in comparison with the control animals infected with protoscolices without exposure to ultrasound waves, depending on many criteria including the numbers, weights and diameters of developed hydatid cysts. The results displayed an obvious impact of ultrasound waves on Echinococcus granulosus protoscolices viability number by increase of exposure period in vitro, in addition to a decrease of 100% of hydatid cysts numbers in the dealt ones with 17% fertility exposed for 20 seconds, the reduction rate was 99.23% in the group of fertility 35% which exposed for 15 seconds, after four and five months of infection.
Keywords:
    Echinococcus granulosus Ultra Sonication Hydatidosis mice
Main Subjects:
  • Biology

Application of ultrasound contra infection with

secondary hydatidosis in mice

 

B.B. Ramdan and A.A. Ali

 

Department of Biology, College of Education for Pure Sciences; University of Mosul, Mosul, Iraq

Email: 1baraa631991@gmail.com, 2dr.asmaa_abdulaziz@uomosul.edu.iq

 

(Received September 23, 2019; Accepted October 21, 2019; Available online July 23, 2020)

 

Abstract

 

The present research explained the impact of ultrasound on the viability of Echinococcus granulosus protoscolices in vitro application of fixed frequency waves at 20000 pulse/sec and 1.8 w/cm2, with different exposing periods, thirty, twenty, fifteen, twelve, ten and five seconds respectively, subsequently prevention of mice against interjected with minor hydatid cysts, in comparison with the control animals infected with protoscolices without exposure to ultrasound waves, depending on many criteria including the numbers, weights and diameters of developed hydatid cysts. The results displayed an obvious impact of ultrasound waves on Echinococcus granulosus protoscolices viability number by increase of exposure period in vitro, in addition to a decrease of 100% of hydatid cysts numbers in the dealt ones with 17% fertility exposed for 20 seconds, the reduction rate was 99.23% in the group of fertility 35% which exposed for 15 seconds, after four and five months of infection.

 

Keywords: Echinococcus granulosus, Ultra Sonication, Hydatidosis, Mice

 

DOI: 10.33899/ijvs.2019.126132.1240, ©2020, College of Veterinary Medicine, University of Mosul.

This is an open access article under the CC BY 4.0 license (http://creativecommons.org/licenses/by/4.0/).

 

تطبیق الأمواج فائقة الصوت ضد الإصابة بداء العُدارِی الثانوی فی الفئران

 

براء باسل رمضان و أسماء عبدالعزیز علی

 

فرع علم الحیاة، کلیة العلوم للعلوم الصرفة، جامعة الموصل، الموصل، العراق

 

الخلاصة                    

 

حددت الدراسة الحالیة تأثیر الأمواج فائقة الصوت فی عیوشیة الرؤیسات للدودة المشوکة الحبیبیة خارج الجسم بتطبیق تردد ثابت لکل المعاملات بمقدار 20 الف ذبذبة / ثانیة و 1.8 واط/سم2 ولفترات تعریض مختلفة 5، 10، 12، 15، 20 و 30 ثانیة على التوالی، بالإضافة الى تمنیع الفئران ضد الإصابة بداء الأکیاس العدریة الثانوی بالمقارنة مع حیوانات السیطرة والمحقونة بالرؤیسات الأولیة غیر المعرضة للأمواج فائقة الصوت. اعتماداً على معاییر عدة تضمنت التغیرات الحاصلة فی أعداد وأوزان وأقطار الیرقات البعدیة المتکونة. بینت النتائج تأثیر الموجات فائقة الصوت فی عیوشیة الرؤیسات لدودة المشوکة الحبیبیة بزیادة فترة التعریض خارج جسم الحیوان، واختزال أعداد الیرقات البعدیة فی الفئران المعاملة بالأمواج فائقة الصوت بنسبة بلغت 100% فی المجموعات التی کانت نسبة عیوشیة الرؤیسات الأولیة فیها 17% والمعرضة لفترة 20 ثانیة للأمواج فائقة الصوت، بینما بلغت نسبة الاختزال 99.23% للمجموعة البالغة نسبة حیویتها 34% والمعرضة لفترة 15 ثانیة، بعد أربعة وخمسة أشهر من الإصابة.

 

 


Introduction

 

Hydatidosis is one of the most important parasitic infections on public and veterinary health worldwide. The disease has significant economic importance concerning mortality and morbidity (1-3) as estimated losses of global production of livestock are two billion dollars (4). The disease has a wide geographical scope and occurs in all continents, including the tropical and subtropical regions. Cystic echinococcosis (hydatid cyst) (CE) was diagnosed by the basic methods of clinical examination, imaging and serological tests (5-7). CE is treated by a variety of ways, including chemical therapy (drug therapy), percutaneous aspiration injection and respiration (PAIR), surgical treatment, or the option of observation without surgical intervention (8,9). Chemotherapy involves the use of albendazole, mebendazole or benzimidazole carbamates, chemotherapy is recommended as the only option in cases. where surgical treatment is not possible or when multiple cysts are available (9). This option includes aspiration of the fluid, injection of lethal agents and re-suction. The non-invasive control option is carried out with the CE4-CE5 stages of cyst development according to the world health organization (WHO) classification to avoid the possibility that these cysts remain fertile. Ultrasound and Serological tests are used for surveillance.

Ultrasound waves are waves with a frequency greater than 20 KHZ (human hearing threshold) (10,11). These are inaudible high-frequency mechanical vibrations produced by the electric generator and are converted to acoustic energy by mechanical deformation of a piezoelectric crystal placed in the power transformer (12). Ultrasonic frequency can be classified primarily into two sections: low-power high-frequency diagnostic ultrasound in the MHZ range, and the low-frequency high-power ultrasound is in the KHZ range. Ultrasound waves are a physical therapeutic method where non-ionizing radiation is applied in the form of mechanical sonicated on the tissues to produce heat. Ultrasound has been used to detect variety of diseases, including parasitic infections since 1970 (13), High Intensity Focused Ultrasound (HIFU) was initially used to treat cancer (14). It was used in the 1940s to treat brain diseases such as Parkinson's disease (15), uterine fibroids and prostate tumors (16). Ultrasound waves have also been used extensively in medical diagnostics and increasingly for therapeutic purposes as they have been applied to break up kidney stones, as a surgical tool for the removal of tumor tissue and as a tool for administration of drugs (17).

Hence the aims of this study were to show the impact of ultrasound in with the vitality of different concentration of protoscolices in vitro and in the prevention of albino mice from infection with hydatidosis. This study is considered as a first study in the country regarding application of ultrasound against hydatidosis.

 

Materials and methods

 

Segregation and testing hydatid cysts

The hydatid cysts were found (Figure 1) after being separated from liver of slaughtered sheep, which collected from butchers' shops in Mosul, and upon arrival in the laboratory, hydatid cysts were examined to ascertain the vitality.

 

 

 

Figure 1: Hydatid cysts (hydatid cysts) in the liver of sheep.

 

Collection and assessment of E. granulosus protoscolices

Sheep cysts containing protoscolices were obtained under sterilized conditions, a live protoscolices, 20 µl of protoscolices suspension were added to 20 µl of 0.1% of eosin pigment on a slide, then tested under light microscope. Bright green protoscolices were considered as alive because of eosin exclusion by protoscolices membranes, whereas red protoscolices were regarded as dead because of acceptance of the pigment. Gained and counted according to authenticated manner (18).

 

Experimental animals

120 Albino mice (four to five weeks old) were used and cared for in the Department of Biology, College of Education for Pure Sciences, University of Mosul, according to the conditions required for the experiments.

 

The device used in the experiment

The ultrasonic waves device was used, catalogue number 1/96/40/80/3/4 supplied by the Omni international (Figure 2).

 

Effect of the ultrasound waves on the vitality of sheep protoscolices in vitro

To determine the effect of ultrasound waves on the vitality of protoscolices in vitro within a certain time and frequency of 20.000 pulse/second, protoscolices with a 100% viability were taken at a concentration of 2000 protoscolex /ml, and then exposed to the ultrasonic waves, amount of ice was placed around the sample to avoid high temperature during exposure. Samples were exposed for 30, 20, 15, 12, 10 and 5 seconds, the post exposure vital percentages were 0, 17, 34, 50, 80 and 90% respectively. The protoscolices were examined under a light microscope for viability taking into consideration the flame cells movement, morphological abnormalities, and exclusion of eosin pigment.

 

 

Figure 2: Ultrasound waves device. (1) Operating power, (2) Main and power stand by for operation too when the sample is exposed, (3) the amplitude capacity starts from 0-28, the frequency is 20 thousand vibration/second.

 

Effect of ultrasound waves in protoscolices injected in vivo

protoscolices with vitality 90, 80, 50, 34, 17 and 0% were selected for mice injection in addition to the control with 100% vitality. A total of 30 male mice, aged 5-3 weeks, were divided into six group (five mice/ each group). The 1st group was injected with 2000 protoscolices of vitality 0%. The 2nd group was injected with 2000 protoscolices of vitality 17%. The 3ed group was injected with 2000 protoscolices of vitality 34%. The 4th group was injected with 2000 protoscolices of vitality 50%. The 5th group was injected with 2000 protoscolices of vitality 80%. The 6th group was injected with 2000 protoscolices of vitality 90%. The 7th group (control) was injected with 2000 protoscolices of vitality 100%. All groups were all dissected after 2, 3, 4, 5 months.

 

Statistical analysis

Results of this study were analyzed statistically based on Completely Randomized Design (CRD) to study the effect of intervals and exposures and the integration between them, then the differences between the averages of each factor and the compatibility between factors were estimated depending on Duncan's Multiple Range Test (DMRT). Statistical Analysis System (SAS version 9) was utilized for applied for data analysis (19).

 

Results

 

Table 1 exhibited the changes in the numbers, diameters and weights of the hydatid cysts, and the of significance of F in the ANOVA analysis, table 2 DMRT for averages test explained a decrease in the average number of hydatid cysts in the treated groups (Figure 3, 5, 7 and 8) compared to control animals (Figure 4 and 6). The treated mice exhibited a reduction in the number of cysts 0.000 at 30 sec exposure, while control mice displayed the highest average of 9.650, 5 months post infection. Table 3 demonstrated the highest percentage reduction of hydatid cysts number in treated mice at 30 seconds exposure followed by 20, 15,12,10 and 5 seconds, respectively.

 

 

Table 1: Effect of ultrasound on numbers, diameters and weights of hydatid cysts in all experience animals

 

Sources of difference

Periods

Treatments

Periods×Treatments

Experimental error

df

3

6

18

112

Cysts numbers

Sum of squares

371.221429

1500.971429

998.628571

1936.4000

Mean squares

123.740776**

250.161905**

55.479365**

17.289286

F value

7.16

14.47

3.21

 

Cysts diameters (mm)

Sum of squares

0.70175484

11.70472077

7.63972497

29.91649261

Mean squares

0.23391828

1.95078679**

0.4244216

0.26711154

F value

0.88

7.30

1.59

 

Cysts weight (gm)

Sum of squares

0.09970644

0.14236411

0.8677981

2.3483044

Mean squares

0.3323548

0.0237235

0.02148777

0.02092706

F value

1.59

1.13

1.03

 

* mean significance at P<0.01, while ** mean significance of P<0.05.

 

 

Diameters are shown in table 1 illustrated F significance, table 4 (DMRT) for averages revealed significant differences between the exposure and non-exposed at 30 and 20 seconds. Significant differences were also observed between mean averages compatibility exposure and period, metacestode diameters in mice injected with protoscolices exposed with ultrasound decreased, with a minimum 5 months post injury 0,000 mm at 30 seconds exposure, followed by 20, 15, 12, 10 and 5 seconds respectively, contrast to the hydatid cysts control group was 0.890 mm. Related to the weight of the hydatid cysts table 1 showed F insignificancy for interference between the two factors (exposure and period).

However, the DMRT (Table 5) showed significant differences between the averages of compatibility regarding periods and exposures. The cysts weights in treated animals decreased to 0.00mg at 30 seconds and all months followed by 20, 15, 12, 10 and 5 seconds, respectively, in contrast to the control group (0.2760mg) 5-month post injury.

 

 

 

Table 2: Effect of ultrasound waves on the number of hydatid cysts in treated animals

 

 

Periods in

2 months

3 months

4 months

5 months

Average

Control

0.800 c

3.200 c

14.600 ab

19.200 a

9.650 a

30 seconds

0.000 c

0.000 c

0.000 c

0.000 c

0.000 c

20 seconds

0.000 c

0.000 c

0.000 c

0.40 c

0.10 c

15 seconds

0.20 c

0.40 c

0.20 c

0.20 c

0.25 c

12 seconds

0.20 c

1.20 c

0.60 c

1.60 c

1.10 c

10 seconds

0.40 c

0.20 c

1.20 c

2.40 c

0.65 c

5 seconds

0.80 c

1.40 c

3.80 c

9.60 b

3.90 b

Average

0.4571 c

1.00 bc

2.9142 ab

4.5714 a

 

The different letters indicate significance, while the similar letters indicate insignificancy.

 

Table 3: Percentage of protoscolices reduction in treated animals for all months

 

Periods

Months

2

3

4

5

5 second

50%

63.08%

65.25%

81.34%

10 second

60%

62.368%

75%

75%

12 second

65.38%

87.5%

92.5%

98%

15 second

87.5%

97.5%

98.66%

99.23%

20 second

100%

100%

100%

100%

30 second

100%

100%

100%

100%

 

Table 4: Effect of ultrasound waves on diameters of hydatid cysts in treated animals

 

Periods

2 months

3 months

4 months

5 months

Average

Control

0.1002 de

0.20570 de

1.087 ab

1.2838 a

0.8900 a

30 second

0.000 e

0.000 e

0.000 e

0.000 e

0.000 e

20 second

0.000 e

0.000 e

0.000 e

0.226 de

0.0565 d

15 second

0.200 de

0.177 de

0.006 e

0.2454 de

0.2334 ed

12 second

0.228 de

0.7277 abcd

0.388 bcde

0.706 abcde

0.2723 bcd

10 second

0.056 de

0.0672 d

0.7100 abcde

0.7016 abcde

0.4179 bc

5 second

0.5870 abcde

0.3094 cde

0.8104 abcd

1.0438 abc

0.5965 ab

Average

0.3083 a

0.2873 a

0.344 a

0.4699 a

 

The different letters indicate significance, while the similar letters indicate insignificancy.

 

Table 5: Effect of ultrasound waves on weight of hydatid cysts in treated animals

 

Periods

Treatments in month

Average

2

3

4

5

Control

0.03272 bc

0.02298 bc

0.06593b c

0.27600 a

0.09304 a

30 second

0.000 c

0.000 c

0.000 c

0.000 c

0.000 c

20 second

0.000 c

0.000 c

0.000 c

0.0188 bc

0.00395 a

15 second

0.0002 c

0.007 c

0.002 c

0.02186 bc

0.03704 a

12 second

0.00866 bc

0.03686 bc

0.03070 bc

0.05397a bc

0.03803 a

10 second

0.0094 bc

0.05068 bc

0.08085ab c

0.07697 abc

0.063210 a

5 second

0.04276 bc

0.01120 bc

0.14316ab c

0.23056 ab

0.07085 a

Average

0.01339 a

0.02765 a

0.04973 a

0.08415 a

 

The different letters indicate significance, while the similar letters indicate insignificancy.

 

 

 

Figure 3: The absence of cysts in animals injected with protoscolices and exposure to ultrasound for 20 Seconds after 3 months.

 

 

 

Figure 4: Growing hydatid cysts (black arrows) in untreated animals after 4 months of infection.

 

 

 

Figure 5: Growing hydatid cysts (black arrow) in animal treated with ultrasound waves for 5 Seconds after 4 months of infection.

 

 

Figure 6: Growing hydatid cysts in (black arrows) in untreated animals (control) after 5 months of infection.

 

 

 

Figure 7: Growing hydatid cysts (black arrows) in the animal treated with ultrasound waves for 5 Seconds after 5 months of infection.

 

 

 

Figure 8: Growing hydatid cysts (black arrows) in animal treated with ultrasound waves for 12 Seconds after 3 months of infection.

 

Discussion

 

The effects of ultrasound waves on cells are divided into two categories: Total effects such as disintegration or influence on cell division capacity and damage to cellular infrastructure, and fine effects such as chromosomal changes, functional changes and heterogeneous growth patterns (17).

The results of electron microscope examination of cells and tissues post exposure to ultrasound waves showed damage of a variety of cellular organelles such as mitochondria at first, lysosomes, causing the release of enzymes in the cell, as well as membrane and mitochondrial damage due to cavitation (17). Cytogenetic studies on the effect of ultrasound waves by other researchers on chromosomes have indicated that high intensity ultrasound waves can cause DNA degradation. It seems that the damage is caused by hydrodynamic shear stresses, free radical formation or overheating that caused by cavitation. Ultrasound waves can cause genetic changes, such as modifying histone structure which can have a long-term effect on gene expression (17). All these explanations illustrate the increased reduction in the cysts and the low numbers of cysts in mice injected with protoscolices exposure to ultrasound.

The results of this study showed that the numbers, weights and diameters of the cysts were reduced in addition to the high reduction rate in the treated mice compared to the control group for all months.

Current study results have shown similarity with those of other researchers revealing that high intensity ultrasound resection efficacy in uncomplicated cases of patients with Echinococcus multilocularis in the liver, implying the destruction of protoscolices, lamellar and germinal layers of the alveolar cyst larvae causing death of morphologically transformed cells which in turn cause liver necrosis (14). Results of biopsy examination after eradication confirmed the damage of impact to protoscolices and cellular components in the alveolar cysts, thus high intensity focused ultrasound considered a promising treatment for alveolar echinococcosis (14), also Imankulov et al. (20) observed the destructive changes on alveococcosis with irregular forms and destroyed structures of the outer cuticular membrane, increase in neutrophil cells, eosinophils and macrophages. Thin sections showed membranes of alveolar cysts with different thickened dissociated and ripped, and the cells of germinal layer were desquamated and the nuclei of cells were lysed and the cytoplasm was vacuolated. The electron microscope showed destruction of the outer cytoplasmic membrane of germ cells, these effects were attributed to the double cavitation and necrosis upon exposure to high intensity focused ultrasound waves (20).

 

 

The results of the present study exhibited an consistency with another study, concerning the action of high intensity focused ultrasound waves to treat cystic echinococcosis in the liver, represented by destructive impact on protoscolices with membrane cavitation (21). Treatment of 42 patients (68%) with liver echinococcosis out of 62 patients, with high intensity focused ultrasound waves, exhibited a clinical response represented by cysts elimination, decrease of (50%) of cysts size in patients, and absence of cystic echinococcosis recurrence after 3 years of treatment. A 7 patients undergone conventional surgical treatment revealed cysts disappearance, a decrease by 50% of cyst size, and absence of cystic echinococcosis recurrence after 3 years of treatment, which prove high intensity focused ultrasound effectiveness as a treatment of choice or as a post-operative adjunct to prevent the spread of parasite (21). Zhang et al. (22) showed the effect of high intensity focused ultrasound (HIFU) with the addition of superabsorbent polymer (SAP) on E. granulosus protoscolices vitality in vitro, the HIFU effect was increased after the addition of superabsorbent polymer due to increased temperature of cystic fluid to about 60ºC, which caused protein denaturation, cell necrosis, and increase of protoscolices death, this was explained by Moazeni et al. (23) as he considered warm water as a protoscolicidal factor at temperature ranging between 50-60ºC.

In addition to the effect of cavitation in killing protoscolices subjected to HIFU, which crashed into small fragments.

Acoustic cavitation is responsible for rupture of long chained organic structures that make up microorganisms. These mechanical effects were invested in disinfecting water contaminated with microbial spores and protozoa, such as Cryptosporidium parvum, within 10 minutes of exposure to ultrasonic waves (24). On the other hand, these properties have also been used to eliminate water contamination with Giardia spp. Cavitation causes mechanical rupture of molecules that make up organisms (24). Other researchers have studied the effect of ultrasound waves on the vitality of Cryptosporidium spp. in the waste water, it was noticed that after 5 minutes of ultrasound wave exposure,50% of cysts were dead, while at 30 minutes of exposure 90% of cysts were dead, they observed that as the temperature increased due to the effect of cavitation there was an increase in activity disruption of Cryptosporidium parvum. Initial exposure to ultrasound waves has been shown to decrease numbers of Giardia spp. When researchers applied ultrasonic exposures at 720-360 KJ (Kilo Joules) to sewage samples 62.5% of cyst were dead, and at a dose of 14400 KJ, approximately 80% of Giardia cysts were eliminated (23).

It can be said that ultrasound waves can be applied in the future through prospective studies as an effective therapeutic method for the treatment of Hydatidosis in human.

 

Conclusion

 

It may well be concludedultrasound has a significant impact on the viability of protoscolices of Echinococcus granulosus in vitro and in BALB/c mice, and may be used in the future as a promising therapeutic method for cystic echinococcosis.

               

Acknowledgements

 

The researchers would like to acknowledge Education College for Pure Sciences, College of Science/ University of Mosul for supporting the current study.

 

Conflict of interests

 

The authors declare no conflict of interests.

  1. The research focused on an important topic, cystic echinococcosis, affecting populations around the world.
  2. The authors highlighted the possibility of using ultrasound as a prospective treatment method for animals against the disease.
  3. It was taken into consideratiom investigation many periods of exposure to ultrasound in vitro to detect the optimal time and study the immune reaction in vivo.
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(2020). Application of ultrasound contra infection with secondary hydatidosis in mice. Iraqi Journal of Veterinary Sciences, 34(2), 397-403. doi: 10.33899/ijvs.2019.126132.1240
Baraa B. Ramdan; Asmaa A. Ali. "Application of ultrasound contra infection with secondary hydatidosis in mice". Iraqi Journal of Veterinary Sciences, 34, 2, 2020, 397-403. doi: 10.33899/ijvs.2019.126132.1240
(2020). 'Application of ultrasound contra infection with secondary hydatidosis in mice', Iraqi Journal of Veterinary Sciences, 34(2), pp. 397-403. doi: 10.33899/ijvs.2019.126132.1240
Application of ultrasound contra infection with secondary hydatidosis in mice. Iraqi Journal of Veterinary Sciences, 2020; 34(2): 397-403. doi: 10.33899/ijvs.2019.126132.1240
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