... Subjects: This prospective follow up study will be carried out at Ain Shams Hospital, and wil... more ... Subjects: This prospective follow up study will be carried out at Ain Shams Hospital, and will include SLE Egyptian patients who attend Inpatient ... 11:R109. Sayeeda A, Al Arfaj H, Khalil N, Al Arfaj AS: Herpes Zoster Infections in SLE in a University Hospital in Saudi Arabia: Risk ...
Searching for new alternatives for the limitation of the vector of diseases, Culex pipiens, the l... more Searching for new alternatives for the limitation of the vector of diseases, Culex pipiens, the larvicidal actions of three plant oil extracts were assessed. On the base of 24hr. LC50 values, the supreme toxic extract against Culex pipiens larvae was Piper nigrum (black pepper), followed by Eucalyptus regnans and Azadirachta indica (neem) oil (6.99 x 10, 2.24 x 10, and 0.44 ppm, respectively). The histopathological results assured the toxicological data. The most characteristic disorder signs visualized in the mid gut region of treated larvae were epithelial cells elongation and vacuolization, rupturing of the peritrophic membrane, detachment of basement membrane, disorganization of microvilli, and furthermore, muscle layer degeneration. The most dramatic changes were observed in the midgut of mosquito larvae treated with Piper nigrum; that could serve as a potential larvicidal agent. Further studies should be considered to discover the stability and residual activity of the tested ...
Phytosanitary irradiation for food commodities has been widely accepted in recent years. Gamma ir... more Phytosanitary irradiation for food commodities has been widely accepted in recent years. Gamma irradiation has been used as a phytosanitary treatment against microbial diseases, insect infestation and food spoilage. The goal of the current study was to determine the lowest possible dose of gamma irradiation that will induce longterm sterility of insects through generations. The effect of four gamma irradiation doses examined were; 20,40, 50 and 70 Gy. Irradiated males were crossed with normal females. For the cowpea beetle Callosobruchus maculatus(F.), adult fecundity, hatchability, adult emergence, sterility% was investigated. 100% adult mortality was achieved by 70 Gy dose. Fecundity, hatchability, number of adults emerged, sterility% were significantly reduced when males exposed to 20, 40, and 50 Gy compared to the control. The effect of parental irradiated males exposed to 20 Gy on F2 generation was also studied. Fecundity, hatchability, number of adult emerged, sterility% were ...
The Egyptian cotton leaf worm, Spodoptera littoralis (Boisduval) (Lepidoptera: Noctuidae) is one ... more The Egyptian cotton leaf worm, Spodoptera littoralis (Boisduval) (Lepidoptera: Noctuidae) is one of the most dangerous and destructive polyphagous agricultural pests of different field crops within its hot and mediate regions. It can attack different economically important crops and causes considerable feeding damage on cotton, vegetables, and some ornamental crops throughout the year in Africa, Asia and Europe. Laboratory studies were performed to determine the effect of Ultra Violet on the insecticidal activity of Spodoptera littoralis Multinucleocapsid Nuclear Polyhedrosis Virus against cotton leaf worm Spodoptera littoralis (Boisduval) (Lepidoptera: Noctuidae). Three diluted concentrations were taken from the original stock and the number of PIB /ml/concentration was counted under light microscope by haemocytometer. The PIB numbers for each concentration (1.0 ml) were1.1x10 8 , 3.11x 10 7 and 6.7x 10 6 , respectively. Each of These concentrations achieved percentage mortalities ...
Egyptian Academic Journal of Biological Sciences, 2020
Plant protease inhibitors) PIs) are one of the plant strategies to maintain favorable growth and ... more Plant protease inhibitors) PIs) are one of the plant strategies to maintain favorable growth and survival. Soybean trypsin inhibitor is the most well-known of the plant serine proteinase. The present study aims to detect the inhibitory activity of two concentrations of partially purified trypsin inhibitors from seeds of soybean(Glycine max). Comparing the results of feeding larvae on partially purified soybean inhibitors with control, revealed that the larval weight reduction caused by soybean PI was noticed after seven days of treatment. The highest larval weight reduction was obtained due to treatment with SPI at levels SPI 30% and SPI 60%, and there was no significant difference between the two levels. Feeding larvae on SPI 60% caused higher larval mortality about 20% than the control followed by SPI 30% which caused 16% larval mortality. The pupation in treated larvae was delayed two days by comparing to control. The highest weight reduction in pupal weight was 3.5± 0.3 gm at SP...
Innate immune response in insects is essential to resist the infections of pathogens. The present... more Innate immune response in insects is essential to resist the infections of pathogens. The present study investigates the antiviral immune response against intracellular baculovirus infection in the desert locust, Schistocerca gregaria. The desert locust was injected with nuclear polyhedral virus isolated from Spodoptera littoralis larvae collected from cotton and maize field in Giza governorates (SlNPV). Haemolymph was perfused 24 h post injection. The hemolymph was taken from control and treated locusts to separate haemocytes from the supernatant plasma to characterize the reaction of the adult S. gregaria to the viral infection. Transmission electron microscope revealed that, infected granular plasmtocyte and prohaemocytes possessed phagocytic vacuoles. However, the haemocytes behavior against viral infections does not seem to be consistent. Conversely, the biochemical results demonstrated that the total number of protein bands of S. gregaria increased due to treatment with SlNPV ...
Abstract In this study, the third instar larvae of Culex pipiens Linnaeus, 1758 were treated with... more Abstract In this study, the third instar larvae of Culex pipiens Linnaeus, 1758 were treated with a lethal concentration of the essential oil (EO) of Citrus sinensis (L.) Osbeck; its nanoemulsion and the EO dissolved in the absolute ethanol were applied. The tested EO induced biochemical and histological changes in the treated larvae. The biochemical changes were presented by an increase in the levels of the acid phosphatase and alkaline phosphatase and non-significant change in the activity of acetylcholinesterase and glutathione S-transferase. Histological studies revealed obvious alterations in the cuticle, muscles, and midgut tissues including changes on the ultrastructural level.
The insect gut is home to a wide range of microorganisms, including several bacterial species. Su... more The insect gut is home to a wide range of microorganisms, including several bacterial species. Such bacterial symbionts provide various benefits to their insect hosts. One of such services is providing metabolites that resist infections. Little data are available about gut-inhabiting bacteria for several insect groups. Through the present work, the gut bacteria associated with the American cockroach (Periplaneta americana L.) were isolated, identified, and studied for their potential antimicrobial activity against multidrug-resistant (MDR) human pathogens. The cockroaches were collected from three different environmental sites. Gut bacteria were isolated, and sixteen species of bacteria were identified using Vitek MALDI-TOF MS. The antagonistic activity of the identified bacteria was tested against a panel of multidrug-resistant bacteria and fungi, namely: methicillin-resistant Staphylococcus aureus (MRSA) (clinical isolate), Streptococcus mutans Clarke (RCMB 017(1) ATCC ® 25175™) (...
Egyptian Journal of Aquatic Biology and Fisheries, 2019
Citrus sinensis Culex pipiens Larvicide Ultrasonication Synthetic insecticides cause pollution to... more Citrus sinensis Culex pipiens Larvicide Ultrasonication Synthetic insecticides cause pollution to the environment. In addition, insects develop resistance toward them. So, there is an urgent need for effective safe alternatives. In the current study, nanoemulsion was prepared from essential oil of Cirtus sinensis by the ultrasonic method. The efficacy of the nanoemulsion was evaluated against larvae of Culex pipiens and compared with that of the bulk emulsion. The mean droplet size of the nanoemulsion was 78.8±14.2 nm with poly dispersity index (PDI) value 0.28. The LC 50 for the nanoemulsion and the bulk emulsion were 27.4 and 86.3 ppm, respectively related to Citrus sinensis essential oil. The Larvicidal activity of the formulated nanoemulsion was more toxic than that of bulk emulsion. The results showed that nanoemulsion of Cirtus sinensis EO can be used for control of vector-borne disease Culex pipiens larvae.
Journal of Radiation Research and Applied Sciences, 2017
The southern cowpea weevil, Callosobruchus maculatus (F) is a severe agriculture pest worldwide. ... more The southern cowpea weevil, Callosobruchus maculatus (F) is a severe agriculture pest worldwide. In the current work, newly emerged adult males of C. maculatus have been irradiated with a low dose of 20Gy gamma radiation. The inherited deleterious effects on the fecundity, hatchability, adult emergence, and the sterility percent were recorded for the progenies F1 and F2 of the irradiated parental males. The fecundity, hatched larvae, the number of males and females were reduced in both F1 and F2. The sterility percent was high in F1 (70.8%) and increased in the F2 (88.3%) generation. Histopathological effects were also documented in the testes of F1 and F2 progenies. The spermatids and sperms have exhibited a variety of abnormalities. In the early spermatids, the nebenkern outer cell membrane was ruptured. The spermatid nucleus loses its homogeneous texture and has multiple foci of dense chromatin, as well as, profiles range has little dense material. In some groups, the nucleus had a peculiar ring of chromatin. The sperms had shown a variety of aberrations. The sperms irregularity distributed in lysed cysts by unusual manner. Also, some sperms had remarkably enlarged axoneme and small rounded nucleus. Many of the sperm cells were observed with two axonemes, abnormal mitochondria derivatives, and more than two accessory bodies. These results indicate that the low dose of 20 Gy induces semi-sterility in C. maculatus through generations. The same technique would help to improve using of sterile insect technique for other agriculture pests.
BackgroundHeavy training rotations load looms over medical residents because of spending long wor... more BackgroundHeavy training rotations load looms over medical residents because of spending long working hours in a stressful environment, the demands of which might exceed their adapting capacity and could affect their psychological and endocrinal functions. The main objective of this research was to study the depressive symptoms, anxiety symptoms, and sequence of salivary cortisol rise as work stress parameters among medical residents in the Ain Shams University, Faculty of Medicine, and identify their correlates. Participants and methodsThis cross-sectional, descriptive study included 47 residents (age range of 24–29 years) of both sexes and different specialties of Ain Shams University’s Faculty of Medicine and who had finished at least 6 months of their residency. Residents with current general medical, allergic, or neurological diseases, substance abuse, and those who scored more than 300 on the social readjustment scale were excluded from the study. All students were assessed using Social Readjustment Rating Scale, the Hospital Consultants’ Job Stress and Satisfaction Questionnaire, the Hamilton Anxiety Scale, and the Beck Depression Inventory. Furthermore, salivary cortisol was tested for the students. ResultsAmong the studied sample, 38 (87.2%) perceived work as stressful, 24 (51.1%) had mild to moderate depressive symptoms, whereas 26 (55.3%) mild anxiety symptoms, 15 (31.9%) mild to moderate anxiety symptoms, and 22 (46.8%) had an abnormal sequence of cortisol rise. Abnormal sequence of cortisol rise was significantly correlated with residency rank (P=0.01), whereas overall work stress was significantly correlated with job clinical nature (P=0.03), depressive symptoms (P=0.04), and anxiety symptoms (P=0.02). ConclusionMedical residents showed high level of work stress-related anxiety and depressive symptoms and high level of abnormal salivary cortisol sequence rise, which was correlated to their residency rank.
The aim of the present work is to seek the histopathological alterations in Culex pipiens larvae ... more The aim of the present work is to seek the histopathological alterations in Culex pipiens larvae midgut that may explain to some extent, the synergistic effect of SlNPV-Btk combination treatment which was noticed in our previous work. Third larval instar of Culex pipens were exposed to LC50 of SlNPV, Btk and SlNPV-Btk (1.3 X 103, 2.5 X 105 and 3.6 X 106) respectively, and alterations in midgut region were recorded 6, 12 and 24 h post-infection. Data showed increasing damages of Cx. pipiens larval midgut epithelium for all three treatments but acceleration in midgut alterations was more evident in case of SlNPV-Btk combination sections. The SlNPV histopathological results revealed a serious damage on epithelial cells, Brush boarder, nuclei and basement membrane. The peritrophic membrane (pm) was not completely lysed untill 24h post-infection. Btk treatment of Cx. pipiens larvae promoted structural alteration changes in midgut and by 24h post infection, swelling and dislodging were ob...
This article appeared in a journal published by Elsevier. The attached copy is furnished to the a... more This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues. Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party websites are prohibited. In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier's archiving and manuscript policies are encouraged to visit: http://www.elsevier.com/copyright
Egyptian Academic Journal of Biological Sciences. A, Entomology, 2009
The toxicity of three different isolates of Egyptian baculovirus namely NPV Giza , NPV Cairo and ... more The toxicity of three different isolates of Egyptian baculovirus namely NPV Giza , NPV Cairo and NPV Alex to Spodoptera littoralis larvae and their effects on some biological aspects of adults were studied. The second and fourth larval instars were highly susceptible to NPV Cairo than to the other isolates. The second larval instar was highly susceptible than the fourth larval instar. NPV Cairo induced larval, pupal and adult malformations. It was found that the three NPV's decreased the moth longevity, fecundity, egg hatchability and altered the sex ratio.
... Subjects: This prospective follow up study will be carried out at Ain Shams Hospital, and wil... more ... Subjects: This prospective follow up study will be carried out at Ain Shams Hospital, and will include SLE Egyptian patients who attend Inpatient ... 11:R109. Sayeeda A, Al Arfaj H, Khalil N, Al Arfaj AS: Herpes Zoster Infections in SLE in a University Hospital in Saudi Arabia: Risk ...
Searching for new alternatives for the limitation of the vector of diseases, Culex pipiens, the l... more Searching for new alternatives for the limitation of the vector of diseases, Culex pipiens, the larvicidal actions of three plant oil extracts were assessed. On the base of 24hr. LC50 values, the supreme toxic extract against Culex pipiens larvae was Piper nigrum (black pepper), followed by Eucalyptus regnans and Azadirachta indica (neem) oil (6.99 x 10, 2.24 x 10, and 0.44 ppm, respectively). The histopathological results assured the toxicological data. The most characteristic disorder signs visualized in the mid gut region of treated larvae were epithelial cells elongation and vacuolization, rupturing of the peritrophic membrane, detachment of basement membrane, disorganization of microvilli, and furthermore, muscle layer degeneration. The most dramatic changes were observed in the midgut of mosquito larvae treated with Piper nigrum; that could serve as a potential larvicidal agent. Further studies should be considered to discover the stability and residual activity of the tested ...
Phytosanitary irradiation for food commodities has been widely accepted in recent years. Gamma ir... more Phytosanitary irradiation for food commodities has been widely accepted in recent years. Gamma irradiation has been used as a phytosanitary treatment against microbial diseases, insect infestation and food spoilage. The goal of the current study was to determine the lowest possible dose of gamma irradiation that will induce longterm sterility of insects through generations. The effect of four gamma irradiation doses examined were; 20,40, 50 and 70 Gy. Irradiated males were crossed with normal females. For the cowpea beetle Callosobruchus maculatus(F.), adult fecundity, hatchability, adult emergence, sterility% was investigated. 100% adult mortality was achieved by 70 Gy dose. Fecundity, hatchability, number of adults emerged, sterility% were significantly reduced when males exposed to 20, 40, and 50 Gy compared to the control. The effect of parental irradiated males exposed to 20 Gy on F2 generation was also studied. Fecundity, hatchability, number of adult emerged, sterility% were ...
The Egyptian cotton leaf worm, Spodoptera littoralis (Boisduval) (Lepidoptera: Noctuidae) is one ... more The Egyptian cotton leaf worm, Spodoptera littoralis (Boisduval) (Lepidoptera: Noctuidae) is one of the most dangerous and destructive polyphagous agricultural pests of different field crops within its hot and mediate regions. It can attack different economically important crops and causes considerable feeding damage on cotton, vegetables, and some ornamental crops throughout the year in Africa, Asia and Europe. Laboratory studies were performed to determine the effect of Ultra Violet on the insecticidal activity of Spodoptera littoralis Multinucleocapsid Nuclear Polyhedrosis Virus against cotton leaf worm Spodoptera littoralis (Boisduval) (Lepidoptera: Noctuidae). Three diluted concentrations were taken from the original stock and the number of PIB /ml/concentration was counted under light microscope by haemocytometer. The PIB numbers for each concentration (1.0 ml) were1.1x10 8 , 3.11x 10 7 and 6.7x 10 6 , respectively. Each of These concentrations achieved percentage mortalities ...
Egyptian Academic Journal of Biological Sciences, 2020
Plant protease inhibitors) PIs) are one of the plant strategies to maintain favorable growth and ... more Plant protease inhibitors) PIs) are one of the plant strategies to maintain favorable growth and survival. Soybean trypsin inhibitor is the most well-known of the plant serine proteinase. The present study aims to detect the inhibitory activity of two concentrations of partially purified trypsin inhibitors from seeds of soybean(Glycine max). Comparing the results of feeding larvae on partially purified soybean inhibitors with control, revealed that the larval weight reduction caused by soybean PI was noticed after seven days of treatment. The highest larval weight reduction was obtained due to treatment with SPI at levels SPI 30% and SPI 60%, and there was no significant difference between the two levels. Feeding larvae on SPI 60% caused higher larval mortality about 20% than the control followed by SPI 30% which caused 16% larval mortality. The pupation in treated larvae was delayed two days by comparing to control. The highest weight reduction in pupal weight was 3.5± 0.3 gm at SP...
Innate immune response in insects is essential to resist the infections of pathogens. The present... more Innate immune response in insects is essential to resist the infections of pathogens. The present study investigates the antiviral immune response against intracellular baculovirus infection in the desert locust, Schistocerca gregaria. The desert locust was injected with nuclear polyhedral virus isolated from Spodoptera littoralis larvae collected from cotton and maize field in Giza governorates (SlNPV). Haemolymph was perfused 24 h post injection. The hemolymph was taken from control and treated locusts to separate haemocytes from the supernatant plasma to characterize the reaction of the adult S. gregaria to the viral infection. Transmission electron microscope revealed that, infected granular plasmtocyte and prohaemocytes possessed phagocytic vacuoles. However, the haemocytes behavior against viral infections does not seem to be consistent. Conversely, the biochemical results demonstrated that the total number of protein bands of S. gregaria increased due to treatment with SlNPV ...
Abstract In this study, the third instar larvae of Culex pipiens Linnaeus, 1758 were treated with... more Abstract In this study, the third instar larvae of Culex pipiens Linnaeus, 1758 were treated with a lethal concentration of the essential oil (EO) of Citrus sinensis (L.) Osbeck; its nanoemulsion and the EO dissolved in the absolute ethanol were applied. The tested EO induced biochemical and histological changes in the treated larvae. The biochemical changes were presented by an increase in the levels of the acid phosphatase and alkaline phosphatase and non-significant change in the activity of acetylcholinesterase and glutathione S-transferase. Histological studies revealed obvious alterations in the cuticle, muscles, and midgut tissues including changes on the ultrastructural level.
The insect gut is home to a wide range of microorganisms, including several bacterial species. Su... more The insect gut is home to a wide range of microorganisms, including several bacterial species. Such bacterial symbionts provide various benefits to their insect hosts. One of such services is providing metabolites that resist infections. Little data are available about gut-inhabiting bacteria for several insect groups. Through the present work, the gut bacteria associated with the American cockroach (Periplaneta americana L.) were isolated, identified, and studied for their potential antimicrobial activity against multidrug-resistant (MDR) human pathogens. The cockroaches were collected from three different environmental sites. Gut bacteria were isolated, and sixteen species of bacteria were identified using Vitek MALDI-TOF MS. The antagonistic activity of the identified bacteria was tested against a panel of multidrug-resistant bacteria and fungi, namely: methicillin-resistant Staphylococcus aureus (MRSA) (clinical isolate), Streptococcus mutans Clarke (RCMB 017(1) ATCC ® 25175™) (...
Egyptian Journal of Aquatic Biology and Fisheries, 2019
Citrus sinensis Culex pipiens Larvicide Ultrasonication Synthetic insecticides cause pollution to... more Citrus sinensis Culex pipiens Larvicide Ultrasonication Synthetic insecticides cause pollution to the environment. In addition, insects develop resistance toward them. So, there is an urgent need for effective safe alternatives. In the current study, nanoemulsion was prepared from essential oil of Cirtus sinensis by the ultrasonic method. The efficacy of the nanoemulsion was evaluated against larvae of Culex pipiens and compared with that of the bulk emulsion. The mean droplet size of the nanoemulsion was 78.8±14.2 nm with poly dispersity index (PDI) value 0.28. The LC 50 for the nanoemulsion and the bulk emulsion were 27.4 and 86.3 ppm, respectively related to Citrus sinensis essential oil. The Larvicidal activity of the formulated nanoemulsion was more toxic than that of bulk emulsion. The results showed that nanoemulsion of Cirtus sinensis EO can be used for control of vector-borne disease Culex pipiens larvae.
Journal of Radiation Research and Applied Sciences, 2017
The southern cowpea weevil, Callosobruchus maculatus (F) is a severe agriculture pest worldwide. ... more The southern cowpea weevil, Callosobruchus maculatus (F) is a severe agriculture pest worldwide. In the current work, newly emerged adult males of C. maculatus have been irradiated with a low dose of 20Gy gamma radiation. The inherited deleterious effects on the fecundity, hatchability, adult emergence, and the sterility percent were recorded for the progenies F1 and F2 of the irradiated parental males. The fecundity, hatched larvae, the number of males and females were reduced in both F1 and F2. The sterility percent was high in F1 (70.8%) and increased in the F2 (88.3%) generation. Histopathological effects were also documented in the testes of F1 and F2 progenies. The spermatids and sperms have exhibited a variety of abnormalities. In the early spermatids, the nebenkern outer cell membrane was ruptured. The spermatid nucleus loses its homogeneous texture and has multiple foci of dense chromatin, as well as, profiles range has little dense material. In some groups, the nucleus had a peculiar ring of chromatin. The sperms had shown a variety of aberrations. The sperms irregularity distributed in lysed cysts by unusual manner. Also, some sperms had remarkably enlarged axoneme and small rounded nucleus. Many of the sperm cells were observed with two axonemes, abnormal mitochondria derivatives, and more than two accessory bodies. These results indicate that the low dose of 20 Gy induces semi-sterility in C. maculatus through generations. The same technique would help to improve using of sterile insect technique for other agriculture pests.
BackgroundHeavy training rotations load looms over medical residents because of spending long wor... more BackgroundHeavy training rotations load looms over medical residents because of spending long working hours in a stressful environment, the demands of which might exceed their adapting capacity and could affect their psychological and endocrinal functions. The main objective of this research was to study the depressive symptoms, anxiety symptoms, and sequence of salivary cortisol rise as work stress parameters among medical residents in the Ain Shams University, Faculty of Medicine, and identify their correlates. Participants and methodsThis cross-sectional, descriptive study included 47 residents (age range of 24–29 years) of both sexes and different specialties of Ain Shams University’s Faculty of Medicine and who had finished at least 6 months of their residency. Residents with current general medical, allergic, or neurological diseases, substance abuse, and those who scored more than 300 on the social readjustment scale were excluded from the study. All students were assessed using Social Readjustment Rating Scale, the Hospital Consultants’ Job Stress and Satisfaction Questionnaire, the Hamilton Anxiety Scale, and the Beck Depression Inventory. Furthermore, salivary cortisol was tested for the students. ResultsAmong the studied sample, 38 (87.2%) perceived work as stressful, 24 (51.1%) had mild to moderate depressive symptoms, whereas 26 (55.3%) mild anxiety symptoms, 15 (31.9%) mild to moderate anxiety symptoms, and 22 (46.8%) had an abnormal sequence of cortisol rise. Abnormal sequence of cortisol rise was significantly correlated with residency rank (P=0.01), whereas overall work stress was significantly correlated with job clinical nature (P=0.03), depressive symptoms (P=0.04), and anxiety symptoms (P=0.02). ConclusionMedical residents showed high level of work stress-related anxiety and depressive symptoms and high level of abnormal salivary cortisol sequence rise, which was correlated to their residency rank.
The aim of the present work is to seek the histopathological alterations in Culex pipiens larvae ... more The aim of the present work is to seek the histopathological alterations in Culex pipiens larvae midgut that may explain to some extent, the synergistic effect of SlNPV-Btk combination treatment which was noticed in our previous work. Third larval instar of Culex pipens were exposed to LC50 of SlNPV, Btk and SlNPV-Btk (1.3 X 103, 2.5 X 105 and 3.6 X 106) respectively, and alterations in midgut region were recorded 6, 12 and 24 h post-infection. Data showed increasing damages of Cx. pipiens larval midgut epithelium for all three treatments but acceleration in midgut alterations was more evident in case of SlNPV-Btk combination sections. The SlNPV histopathological results revealed a serious damage on epithelial cells, Brush boarder, nuclei and basement membrane. The peritrophic membrane (pm) was not completely lysed untill 24h post-infection. Btk treatment of Cx. pipiens larvae promoted structural alteration changes in midgut and by 24h post infection, swelling and dislodging were ob...
This article appeared in a journal published by Elsevier. The attached copy is furnished to the a... more This article appeared in a journal published by Elsevier. The attached copy is furnished to the author for internal non-commercial research and education use, including for instruction at the authors institution and sharing with colleagues. Other uses, including reproduction and distribution, or selling or licensing copies, or posting to personal, institutional or third party websites are prohibited. In most cases authors are permitted to post their version of the article (e.g. in Word or Tex form) to their personal website or institutional repository. Authors requiring further information regarding Elsevier's archiving and manuscript policies are encouraged to visit: http://www.elsevier.com/copyright
Egyptian Academic Journal of Biological Sciences. A, Entomology, 2009
The toxicity of three different isolates of Egyptian baculovirus namely NPV Giza , NPV Cairo and ... more The toxicity of three different isolates of Egyptian baculovirus namely NPV Giza , NPV Cairo and NPV Alex to Spodoptera littoralis larvae and their effects on some biological aspects of adults were studied. The second and fourth larval instars were highly susceptible to NPV Cairo than to the other isolates. The second larval instar was highly susceptible than the fourth larval instar. NPV Cairo induced larval, pupal and adult malformations. It was found that the three NPV's decreased the moth longevity, fecundity, egg hatchability and altered the sex ratio.
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