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Effect of Bioactive Compounds Extracted from Green Algae Spirogyra sp. in Reducing the Protoscolices Viability In vitro Compared with Albendazole Drug.

Hydatid cyst disease (HCD) or cystic echinococcosis (CE) is a serious and important zoonotic disease (Zhang et al., 2017; De NV & Le van D 2017), an endemic disease (Al-Mayah et al., 2012). This disease results in the infection of the intermediated host (sheep, cattle and other livestock as well as humans) in the larval stage of Echinococcus granulosus of the Taeniidae family (Dumanet al, 2016).

The disease spreads in livestock breeding areas and carnivorous animals that are in close contact with humans and which help to complete the life cycle of the parasite causing the disease (Hayajneh et al., 2014). The life cycle is complete with two speies of hosts, the intermediated host such as Sheep, Cows, Horses, Camels, Pigs and other animals (WHO, 2017) and the final host are Dogs, Wolves, Foxes and other animals where the adult parasite is present in the intestines and has no symptoms, (Dumanet al., 2016) As well as the human who is sometimes an accidental host interrupted by the life cycle of the parasite(Rampal et al, 2016; WHO, 2017; Zhang et al, 2017 ; Mestrovic, 2016).

The disease affects many organs in the human body and the intermediatedhost, The most common organs are the liver, lung, spleen, kidney, heart, brain, urethra, uterus, fallopian tube, pancreas, mesenteric membrane, muscle and other organs.and injury The brain is more common in children (Khuranaet al., 2012).

Echinococcosis is an endemic disease in large parts of the world (Pradhan et al., 2017), such as some of the countries of South America and the Middle East and North Africa, which are Hippendemicregions of the disease (McManus et al., 2012). Including the Arab countries, such as Egypt, Sudan, Libya, Algeria, Lebanon, Palestine, and Iraq (Sadadjadi, 2006).

In the seventh decade of the 20th century, researchers aimed to use benzemidazole and its derivatives such as benzadazole (ABZ), mebendazole (MBZ), flopendazole, and other drugs as a treatment for hydatid cysts disease (Bekhtiet al., 1977). Because of its high solubility and its entry into the hydatid cyst before the completion of its layers compared with other treatments, resulting in a decrease in the size of the cyst (Brunetti, 2015). It is the main routine treatment after the surgical removal of hydatid cyst. Studies show that about 30% Aqueous has completely treated Andasul Alps, while 40-50% have responded after a short period of treatment (Hejaziet al., 2016), then the effects of this treatment appeared in the body, especially when used for a long time. Because of the negative effects of chemotherapy, such as impaired liver function, diarrhea, nausea and abdominal pain, as well as the possibility of the return of infection in some cases and the resistance of parasite to some therapeutic materials, so many researchers went to the use of medicinal plants trying to find alternative treatments with less or without side effects, Cost and research worldwide (Koshkiet al., 2017).

Several algae species, which can be of a very high nature, have been used for new sales of biological activity (Athbi, 2017), including micro-algae, which are important in medical and commercial terms for containing high-value active materials and processing molecules. Disease and may act as antibiotics for a large number of microorganisms including parasites (Monoz and Fernandez, 2017), being able to produce a wide range of active biochemical compounds, immunosuppressant, cytotoxic and enzyme inhibitors (Kassemi et al., 2004).

Most of the compenentes isolates from algae or plants belong to the group of phenols, tannins, peptides, Saponins, triterpenes, and alkaloids (Molera and Semesi, 1996). One of these algae is Spirogyra sp.. (Liani and Katoch, 2017), a rich source of natural chemicals that can be derived from simple methods (Verma and Khan, 2016; Pacheco et al., 2015).

The present study extracted medically material contained in Spirogyra Sp. by Gas Chromatography Mass Spectrometry (GC/MS). As well as a statement of the effect of the extract in reducing the viability of the protoscolices of the parasite Echinococcusgranulosus compared with the albindazole drug in vitro.


Collection and preparation of algae samples

Spirpgyra sp. (Fig. 1) Collected during the of September, 2017 from the rice fields in the Qadisiyah and Manathira districts area in Najaf province, then samples transfer in plastic bottles after immersion in distilled water to laboratory in the Department of biology / faculty of Education / University of AL-Qadisiyah university. The algae filaments were isolated under an inverted microscope (Optika, Italy) and then placed in test tubes, and then washed 8 times per tube using a cold centrifuge 3000 cycles / min for 15 minutes during which the water was replaced after each wash.

After ensuring no impurities, algae filaments were placed in a 500 mL conical container containing BG11 feed medium, placed in a culture chamber below 25[degrees]C and using fluorescent lamps for two months. Then the living mass of Spirogyra sp. It's ready to extract. Preparation of the extract

Active substances were extracted according to Taskinet al. (2007) with some modulation. Algae were dried at room temperature and dry matter was weighed. 50g dry weight was obtained for Spirogyra sp.. The dry mass was then kept at a temperature of 20[degrees]C, followed by 1g dry matter per moss and placed in the Thamble. then put the container in the place allocated to the Soxhlet and added 250 ml of ethanol 70% and left the sample for two hours to solvent saturated solvent, after the extraction was carried out in the Soxhlet until the leaky leachate near the water. Then the liquid leachate was dried using the incubator device at a temperature of 37 [degrees]C and then the resulting dry matter was weighed. 12 g dry weight was obtained for the extract.

Determination of active substances in the extract

The chemical compounds in the crude alcoholic extract of the Spirugera sp. were detected using (GC-Mass) gas chromatography Mass type (Japanese-made Agilent Technologies GC-mass 7890 AGC System) in the Ministry of Science and Technology / Baghdad. The machine works with the GC clarus 500 Perkin Elmer system which includes the [AOC-20i + s] auto sampler for vehicles and the gas chromatography associated with mass spectromrtry and gas chromatography for compounds.

Collection of Hydatid Cysts

The hydatid cysts (Fig. 2) were collected from sheep from the Al-Najaf abattoir was brought to the Department of biology / Faculty of Education / Al-Qadissiyah University immediately after the slaughter of infected sheep in plastic containers chilled with ice so that the protoscolices inside the bag are not affected by ambient temperature (Smyth, 1976).

Preparation of Protocolices Estimate of Protoscolices Viability

The viability of protoscolices was assessed By method of Samyth and Barett (1980) Where it takes a certain size of the protoscolices suspension in the PBS solution with the same volume of Eosin Aqueous Stain (0.1%) and using the Micropipette, then stir well and took a drop and examined it under the light microscope, Olympus (Japan) and under the 10x40 magnification force were calculated. The percentage of live protoscolices, which are bright green, where the stain did not enter its membranes, compared to the protoscolices red-colored that were dead because their membranes had become pigmented (Fig. 4) the number of protpscolices live in the sample divided on the total number of calculated protoscolices x 100 and three replicates.

Percentage of viability = [Number of live primary visions/Total number of primary visions in the calculated sample] x 100

Smyth (1985) method was used to obtain the protoscolices. The surface of the hydatid cysts was sterilized using 70% ethyl alcohol, then the fluid was withdrawn with the protoscolices using a 10 ml syringe with a 21 gauge needle to reduce pressure inside the hydatid cyst, then opened the hydatid cysts with a sterile medical scalpel and extracted the secondary hydatid cysts and the germinated layer and placed in a sterile Petri dish containing a solution of Phosphate Buffered Saline (PBS) (Figure 3). The generated layer was washed with solution (PBS) to collect the protoscolices, This suspension contains the protoscolices in the test tubes, A centrifugation process was carried out using the centrifuge, LWS M24 Combo three times at 3000 cycles per minute for 15 minutes per deposition. In the first wash, use the PBS solution and add 2000 units / L of penicillin and 1 G / l of streptomycin before starting the second wash. In the third wash, the Phosphate Buffered Saline (PBS) was used only. after the washing process to remove the leachate and add a little Phosphate Buffered Saline to the precipitate then to preserve the suspension of the protoscolices with Kerb's Ringer solution. For the purpose of estimating the viability of the protoscolices and calculating their number.

Count of Viable Protoscolices

The number of protoscolices was calculated using a 10 microliter pipette and a fixed size transfer method aftershaking the protoscolices suspension and Phosphate Buffered Saline. The number of protoscolices in 10 1/4 1 = 31 was as shown in Table (1), so the number of protoscolices in (1 ml) = 100 x 31 = 3100 scolice. Therefore, the approximate number of 2000 protoscolices is approximately 0.7 ml (Wangooet al, 1989).

Study of the effect of crude alcoholic extract of Spirugera sp. in the viability of the protoscolices in vitro

The crude alcoholic extract of Spirugera sp. was studied with concentrations (250, 500, 1000) mg / mL in the viability of protoscolices in vitro, based on Al-Nakeeb (2004) and Barzanjiet al. (2009). Concentrations were distributed on test tubes, each containing the Kerb's Ringer medium with hydatid cyst fluid and by 1:4 respectively. The protoscolices were then shoved to ensure the distribution of protoscolices in the tubes.Each tube contained nearly 3,000 protoscolices, One of the tubes was leave without extract and was considered a control group. The number of live protoscolices in the suspension was then calculated with three replicates per concentration and using Eosin Aqueous Stain (0.1%) and the readings of the three replicates were taken from the first hour for 7 days.

Study of the effect of albendazole In the viability of the protoscolices in vitro

The efficacy of albendazole was studied in the viability of protoscolices with concentrations (250, 500, 1000) mg / ml in vitro. The drug was emulsified and in a 20 ml pack with a concentration of 20 mg / ml. The property was purchased from local pharmacies and is produced by the Egyptian International Company for Pharmaceutical Industries CO. E.I.P.I.CO., The concentrations were distributed to test tubes containing the Kerb's Ringer medium with the hydatid cyst fluid at 1:4, respectively, and the same steps were performed in the previous experiment. statistical Analysis

The results were analyzed using Prism (SAS Institute, Inc. USA) Graph Pad, the fifth version where the ANOVA test was applied with the least significant difference of LSD for this purpose. Confidence interval was equal to 95% The probability level is less than 0.05 (P <0.05).


Estimating the vitality of the protoscolices

The results of the study, as shown in Table (1), showing the viability of the protoscolices in 10 microliters and the three replicates calculated in the fixed-size method. There were no significant differences in the first three treatments, whereas the coefficients of 72-144 hour showed significant differences. If the mean S.D. [+ or -] viability of the protoscolices at the highest rate at treatment at 0 hour (33 [+ or -] 5.29) protoscolices, while the mean of the protoscolices dropped to the lowest ratio at 144 to 14 [+ or -] 1 protoscolices. While the mean S.D. [+ or -] mean of the protoscolices viability of the treatments 24-120 hours between 31.33 [+ or -] 1.52-16.66 [+ or -] 1.52 protoscolices. thus showed that the vitality of the protoscolices begin to decrease over time.

Percentage of viability of protoscolices

The results showed that the percentage of the viability of protoscolices in vitro was 100 1/4 l and three replicates. As shown in Table (2), the total number of protosclices ranged from 177-193. The average number of live protoscolices ranged between 170-177 protoscolices / 100 1/4 l, While the number of dead protoscolices ranged from 6-16 protoscolices / 100 1/4 l. Thus, the average percentage of the viability of the protoscolices on the first day was 94.25%. The results showed that the percentage of the viability of the protoscolices gradually decreased for seven days as shown in Table (3).

Determination of chemical compounds in crude alcoholic extract for Spirogyra sp

GC-MS was analyzed for the crude alcoholic extract of algae. The algal chemical compounds were classified. Quantitative and qualitative abundance was observed in the chemical content of the algae. Sixty-nine chemical compounds were extracted from the crude alcoholic extract of Spirogyra sp. Varied between phenols, turbines, fatty acids, hydrocarbons and hetero cyclic compoundsas shown in Fig. 5. The current study showed variation in species and time of retention of GC-MS-detected algal-chemical compounds.

Study of the effect of crude alcoholic extract of Spirogyra sp. in the viability of the protoscolices in vitro

The results of this study showed a decrease in the percentage of the viability of the protoscolices when exposed to the concentrations of the crude alcoholic extract of the Spirugera sp. The concentration of 250 mg / ml resulted in a decrease in the percentage of protoscolices from 92.75 [+ or -] 0.62 at 0 hour to 27.06 [+ or -] 0.48 at 144 hourcompared with control group (76.56 [+ or -] 0.79), while the concentration of 500 mg/ml decreased from 92.59 [+ or -] 0.58 per hour to 0.14 [+ or -] 0.25% at 144 hours compared with the control group, while the concentration was 1000 mg / Ml has led to the killing of all protoscolices at 144 hour compared with the control group, has been shown (L.S.D.) showed significant differences of concentration of 1000 mg / ml compared with the rest of concentrations and the most important concentration as in Table (4) Figure (6) (7).

The rate of decrease in the percentage of all in vitro treatments was 76.56% after seven days of conservation. The results of the study of the effect of crude alcoholic extract of Spirogyra sp. reduces the viability of protoscolices with increased concentration. The concentration of 250 mg/ml of Spirogyra sp. was reduced todecreased viability protoscolices to 27.06% at 144 hour, while the concentration of 500 mg/ml for Spirogyra sp. was reducedtodecreased viability protoscolices to 6.14% at 144 hour. Concentration of 1000 mg/ml for the crude alcoholic extract of the Spirogyra sp. resulted to killed to all the protoscolices at 144 hour.

Effectiveness of the crude alcoholic extract of Spirogyra sp. To the active substances in its chemical content such as phenols, turbines, fatty acids, hydrocarbons and hetero cyclic compounds. This extract had a significant effect in reducing the viability of the protoscolices of the E. granulosus parasite with increasing concentration. The presence of these active substances explains this effect as these substances have The inhibition effect (Adekunle, 2000). It also inhibits the metabolism of carbohydrates through its effect on mitochondria and thus the breathing process and thus leads to parasite death (Delorenziet al., 2001). Phenols also have an effect on the acetylcholine esterase, which controls the permeability and elasticity of the cell membrane and thus the loss of the membrane of the competing property, which reduces to the entry of various substances, including uncontrolled nitrogenous substances into the parasite and accumulates in it leading to its death (Naguleswaranet al., 2006). Some studies indicate that phenols have the ability to bind to the cytoplasm and cytoskeletal fat, thereby altering their functional structure and then the death of the living cell (Mani & Chitra, 1989; Diaz & Abeger, 1986) It also works to deposit the proteins in or inside the membrane of the cell when they are permeated through the membrane and the formation of hydrogen bonds between free and multiple hydroxyl phenols and nitrogen compounds or proteins and thus inhibiting certain enzymes needed by the organism (Covington, 1997; Reed, 1995). Some of the substances in the chemical content of this algae are fatty acids, some laboratory studies have indicated that some natural fatty acids possess antimicrobial and parasite properties, such as the study of Rayanet al. (2005), which proved that fatty acids play an important role in Giardia parasite resistance Especially Dodecanoic acid, through its effect on the trophozoite stage of the parasite, accumulating inside cytoplasmic cell and thus rupturing the cell membrane and parasite death. The fatty acids needed by parasitic tapeworms, including the E. coli parasite, E. granulosus, can't be synthesized by the parasites, so they get them from the environment or host (Chabalgoity et al., 1997) It has been shown that a special protein called E. granulosus Fatty acids binding protein (EGFABp1) has a role that remains unclear in the transmission of fatty acids (Jakobsson, 2005). It has been shown to be important in the absorption and transfer of fatty acids into the parasite (Storch & Thumser, 2000; Zimmerman & Veerkamp, 2002; Haunerland & Spener, 2004). Fatty acids can bind with these proteins and penetrate the parasite membrane, causing high concentrations of fatty acids And the ability of the transport system to identify different fatty acids (Storch & Thumser, 2000; Haunerland & Spener, 2004). The Krugliaket al. (1995) study also showed that fatty acids have a disincentive to Plasmodiom sp. In white mice. Another study, Zuoet al. (2012), showed that fatty acids play a major role in increasing diseases resistance and regulating immunity after parasitic infection, as fatty acids have a significant protective role against Cryptocaryon irritants. Among the substances in the chemical content of this extract is the hetero cyclic compounds. Some studies such as Yanagimotoet al. (2002) have shown that heterocyclic compounds found in coffee have an antioxidant activity. Hetero cyclic compounds can also be used to synthesize drugs as antiviral agents for chronic diseases or infections (Cirilloet al., 200

Study of the effect of albendazole in viability of protoscolices in vitro

The results shown in Fig. 9 and 10 and Table 5 showed significant differences. Albendazole concentrations reduced the percentage of viability of protoscolices. When exposed to 250 mg / mL, The result was a decrease from 93.75 [+ or -] 0.77 at 0 hour to 4.15 [+ or -] 0.36 at 144 hour, while the concentration of 500 mg / ml reduced the percentage from 48 [+ or -] 0.85 at 0 hour to 0,4 [+ or -] 0.48 at 144 hour, while The concentration of 1000 mg / ml resulted in the killing of all protpscolices indications at 120 hour compared to 0 hourwhere the percentage of viability of protoscolices was 45.5 [+ or -] 0.98.

The results of this study showed that this drug has a significant effect on the viability of the protoscolices with increased concentration and duration of exposure to the drug. This result is in line with the findings of Imad (2002), Al-Nakeeb (2004), Al-Bayati, Arslan (2009), Al-Hamiary (2010) and Khalaf (2012), which is of medical importance against microorganisms and parasites. The best medicines derived from benzimidazole.

The drug has the ability to paralyze and kill the parasite and has the ability to stimulate the immune system in humans and animals (Bayati and Arslan 2009). Albendazole also has the ability to bind to B-tubulin, causing damage to the transport and growth functions of parasite cells Polymerization of this protein stops in the microtubules. This association impairs the absorption of glucose sugar in the parasites and their larvae, and depletes the stock of the animal starch (glycogen) in the parasite. The rate of ATP decreases and the energy levels decrease and thus the parasite dies. It is also a preferred drug in the treatment of HCD for its high ability to break down the layer created in the wall of the cyst and its decay and shrinkage as well as the disappearance of secondary hydatid cysts inside the hydatid cyst (Yarsanet al., 2003; Wilson et al., 1987.

(Received: 09 April 2018; accepted: 21 June 2018)


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Haider M. Alkaabi and Hadi M. Almayali

University of AL-Qadisiyah, Faculty of Education, Biology Determent, Al-Dewania, Iraq.

* To whom all correspondence should be addressed. E-mail :

Caption: Fig. 1. Spirugera sp. (X400)

Caption: Fig. 2. Severe infected with hydatid cyst in liver of sheep

Caption: Fig. 3. Brood capsules and germinal layer isolated from sheep hydatid cysts

Caption: Fig. 4. living protoscolices (green) and dead protoscolices (red) used eosin stain

Caption: Fig. 5. Determination of chemical compounds in the crude extract of Spirogyra sp

Caption: Fig. 6. Effect of the crude alcoholic extracts of Spirogyra sp. (1000, 500, 250) mg / ml in the viability of the protoscolices

Caption: Fig. 7. Control group on the seventh day (144). (Power x100 magnification)

Caption: Fig. 8. Effect of the alcoholic extract of the Spirogyra sp. mulberry at a concentration of 1000 mg / ml in viability of protoscolices on the seventh day (144) (magnification power X400)

Caption: Fig. 9. Effect of albendazole concentrations (1000, 500, 250) mg/ml in the viability of exogenous primates

Caption: Fig. 10. Effect of albendazole 1000 mg / ml in the viability of protoscolices on day 6 (hour 120). (Power zoom X400)
Table 1. Determination of the viability of the protoscolices
in 10 microliter using the fixed size method

Duration         Number of            Average          Standard
of the        protoscolices in        number
transaction   10 [micro]l For          error
(hour)        three replicates
              of protoscolices

              1    2     3         S.D. [+ or -]         S.E.

0             39   29    31       33 [+ or -] 5.29       3.05
24            30   31    33      31.33 [+ or -] 1.52     0.88
48            32   28    29      29.66 [+ or -] 2.08     1.20
72            30   25    21      25.33 [+ or -] 4.5      2.60
96            22   18    19      19.66 [+ or -] 2.08     1.20
120           15   17    18      16.66 [+ or -] 1.52     0.88
144           13   14    15        14 [+ or -] 1         0.57
LSD0.05                 5.52

Table 2. Determination of the percentage of protoscolices in 100
microliters on the first day

Duplicates       the average     1       2       3

Average number     172.66       170     171     177
  of live
Average number      10.66       10       6      16
  of dead
Average number     183.33       180     177     193
  of headings
Percentage          94.25      94.44   96.61   91.70
[LSD.sub.0.05]      9.38

Duplicates       the average   Average calculation
                                  S.D. [+ or -]

Average number     172.66      172.66 [+ or -] 3.05
  of live
Average number      10.66      10.66 [+ or -] 2.08
  of dead
Average number     183.33       183.33 [+ or -] 8
  of headings
Percentage          94.25
[LSD.sub.0.05]      9.38

Table 3. Determination of the percentage of protoscolices in 100
microliters within seven days

Duplicates    Percentage of viability of protoscolices (%)

                       0                    24

1                     95                   93.86
2                    93.5                  90.6
3                    94.25                 87.4
Rate          94.25 [+ or -] 0.31   90.62 [+ or -] 1.31

Duplicates    Percentage of viability of protoscolices (%)

                      48                   72

1                   89.23                 88.1
2                   87.82                 83.19
3                   85.45                 86.5
Rate          87.5 [+ or -] 0.77   85.93 [+ or -] 1.02

Duplicates    Percentage of viability of protoscolices (%)

                      96                    120

1                     82                   75.06
2                    80.25                 80.12
3                    81.5                  79.18
Rate          81.25 [+ or -] 0.36   78.12 [+ or -] 1.09

Duplicates    Percentage of viability of protoscolices (%)


1                    77.09
2                    78.2
3                    74.4
Rate          76.56 [+ or -] 0.79

Table 4. The percentage of the viability of the protoscolices
after exposure to different concentrations of the crude alcohol
extract of Spirugera sp. and for different time periods in vitro

Time(hour)        Percentage rate of protoscolices,
concentrate          standard error [+ or -]

                       0                    24

Control       94.25 [+ or -] 1.01   90.62 [+ or -] 0.41
250mg/ml      92.75 [+ or -] 0.62   89.56 [+ or -] 0.83
500 mg/ml     92.59 [+ or -] 0.58   82.70 [+ or -] 0.99
1000 mg/ml    90.9 [+ or -] 1.55     71.18 [+ or -] 1
The least significant
difference [LSD.sub.0.05]

Time(hour)      Percentage rate of protoscolices,
concentrate         standard error [+ or -]

                      48                    72

Control       87.5 [+ or -] 0.83    85.93 [+ or -] 0.90
250mg/ml      81.25 [+ or -] 0.46   72.90 [+ or -] 1.21
500 mg/ml     67.88 [+ or -] 0.48   55.55 [+ or -] 1.98
1000 mg/ml    57.54 [+ or -] 1.61   43.90 [+ or -] 1.03
The least significant
difference [LSD.sub.0.05]

Time(hour)      Percentage rate of protoscolices,
concentrate         standard error [+ or -]

                      96                    120

Control       81.25 [+ or -] 1.47   78.12 [+ or -] 1.12
250mg/ml      53.12 [+ or -] 0.78   39.56 [+ or -] 1.66
500 mg/ml     28.37 [+ or -] 1.02   12.33 [+ or -] 0.70
1000 mg/ml    10.59 [+ or -] 0.83   1.50 [+ or -] 0.11
The least significant                      2.746
difference [LSD.sub.0.05]

Time(hour)    Percentage rate of protoscolices,
concentrate      standard error [+ or -]


Control       76.56 [+ or -] 0.90
250mg/ml      27.06 [+ or -] 0.48
500 mg/ml     6.14 [+ or -] 0.25
1000 mg/ml       0 [+ or -] 0
The least significant
difference [LSD.sub.0.05]

Table 5. The percentage of the viability of the protoscolices
after exposure to different concentrations of albendazolefor
difrent times periods in vitro

Time(hour)      Percentage rate of protoscolices,
concentrate        standard error [+ or -]

                       0                    24

Control       94.25 [+ or -] 1.01   90.62 [+ or -] 0.41
250mg/ml      93.75 [+ or -] 0.77   36.43 [+ or -] 1.06
500 mg/ml      48 [+ or -] 0.85      32 [+ or -] 1.29
1000 mg/ml    45.5 [+ or -] 0.98    35.29 [+ or -] 1.14
The least significant
difference [LSD.sub.0.05]

Time(hour)      Percentage rate of protoscolices,
concentrate        standard error [+ or -]

                      48                    72

Control       87.5 [+ or -] 0.83    85.93 [+ or -] 0.90
250mg/ml       25 [+ or -] 0.97      25 [+ or -] 1.18
500 mg/ml      28 [+ or -] 1.02      24 [+ or -] 1.26
1000 mg/ml    17.64 [+ or -] 0.72   15.64 [+ or -] 0.80
The least significant
difference [LSD.sub.0.05]

Time(hour)      Percentage rate of protoscolices,
concentrate        standard error [+ or -]

                      96                    120

Control       81.25 [+ or -] 1.47   78.12 [+ or -] 1.12
250mg/ml      21.87 [+ or -] 0.54   6.24 [+ or -] 0.44
500 mg/ml     13.32 [+ or -] 0.70    9.7 [+ or -] 0.25
1000 mg/ml    1.94 [+ or -] 0.30       0 [+ or -] 0
The least sign       2.434
difference [LSD.sub.0.05]

Time(hour)    Percentage rate of protoscolices,
concentrate       standard error [+ or -]


Control       76.56 [+ or -] 0.90
250mg/ml      4.15 [+ or -] 0.36
500 mg/ml       4 [+ or -] 0.48
1000 mg/ml       0 [+ or -] 0
The least significant
difference [LSD.sub.0.05]
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Author:Alkaabi, Haider M.; Almayali, Hadi M.
Publication:Journal of Pure and Applied Microbiology
Article Type:Case study
Date:Sep 1, 2018
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