Xanthomonas oryzae. [Descriptions of Fungi and Bacteria].

1970 ◽  
Author(s):  
J. F. Bradbury
Keyword(s):  
Geographical Distribution ◽  
Vascular System ◽  
Natural Infection ◽  
The Philippines ◽  
Cyperus Rotundus ◽  
Xanthomonas Oryzae ◽  
Zizania Latifolia ◽  
Tropical Regions ◽  
Zizania Aquatica ◽  
Weed Hosts

Abstract A description is provided for Xanthomonas oryzae. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Oryza sativa. Natural infection of Leersia oryzaides, Leersia oryzaides var. japonica and Zizania latifolia[Zizania aquatica] is known (Mizukami & Wakimoto, 1959). Natural infection of Cyperus rotundus and C. difformis was reported in India (48, 460), but inoculation of these hosts in the Philippines failed (48, 1689). By inoculation many wild species of Oryza (45, 1789), Leptochloa filiformis (48, 1689), L. chinensis, L. panacea and Zizania aquatica (48, 1683) have all been found susceptible. DISEASE: Bacterial blight of rice and kresek disease of rice. Blight most commonly appears on leaves of young plants, after planting out, as water-soaked stripes at the margins. These enlarge and coalesce to give the characteristic yellowish lesions with wavy edges that occur mainly along the margins of the upper parts of the leaves. These lesions may later expand to cover much of the leaf, which turns whitish or greyish and dies. Leaf sheaths of the more susceptible varieties may be affected. Kresek, which occurs in tropical regions, is a strong systemic infection in which leaves or whole young plants wither and die. In older plants the leaves become pale yellow. GEOGRAPHICAL DISTRIBUTION: Limited to Asia (CMI Map 304, ed. 2, 1964). Occurrences not shown on this map include Korea, Taiwan and Indonesia (Mizukami & Wakimoto, 1969). TRANSMISSION: Spread locally by wind and rain and also by flood and irrigation waters; gains entry to the field in infected planting material, to the nursery in seed, and to both nursery and field from volunteer rice plants and weed hosts usually via the irrigation water. Overwintering may occur on volunteers, on or in the rhizospheres of weed hosts, in stored infected straw and in seed, but it is unlikely in soil and plant debris exposed to the weather, at least under Japanese conditions (Mizukami & Wakimoto, 1969). Infection is through hydathodes and wounds. Penetration through stomata results in a build-up of bacteria in the intercellular spaces, but it is not until they have been exuded on to the leaf surface and re-admitted through the hydathodes and thence into the vascular system, that symptoms of the disease appear (46, 2720).

Xanthomonas oryzae pv. oryzae. [Descriptions of Fungi and Bacteria].

2000 ◽  
Author(s):  
G. S. Saddler
Keyword(s):  
Geographical Distribution ◽  
Tamil Nadu ◽  
Vascular System ◽  
Xanthomonas Oryzae ◽  
Green Water ◽  
Panicum Maximum ◽  
Zizania Latifolia ◽  
Rice Plants ◽  
Zizania Aquatica ◽  
Weed Hosts

Abstract A description is provided for Xanthomonas oryzae pv. oryzae. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Oryza sativa, Oryza spp. ; Brachiaria mutica, Cenchrus ciliaris, Cyperus difformis, C. rotundus, Cynodon dactylon, Echinochloa crus-galli, Leersia hexandra, L. oryzoides, Leptochloa chinensis, Panicum maximum, Paspalum scrobiculatum, Zizania aquatica, Zizania latifolia, Z. palustris and Zoysia japonica (Poaceae); by artificial inoculation: Leptochloa filiformis and L. panacea (Poaceae). DISEASE: Bacterial blight of rice and kresek disease. Symptoms appear on leaves of young plants, after planting out, as pale green to grey-green, water-soaked streaks near the leaf tip and margins. These lesions coalesce and become yellowish-white with wavy edges. The whole leaf may eventually be affected, becoming whitish or greyish and then dying. Leaf sheaths and culms of more susceptible cultivars may be attacked. Systemic infection, known as kresek, results in wilting, desiccation of leaves and death, particularly of young transplanted plants. Kresek is associated with tropical storms which spread the pathogen and also wound rice plants. High temperature (c. 30°C) and humidity favour the disease. The bacterium invades rice plants through hydathodes on leaves, root-growth cracks and wounds. When inside the plant, the bacterium enters the vascular system, in which it spreads. Bacteria eventually ooze out of water pores on hydathodes. GEOGRAPHICAL DISTRIBUTION: AFRICA: Burkina Faso, Cameroon, Gabon, Madagascar, Mali, Niger, Senegal, Togo. NORTH AMERICA: USA (Louisiana, Texas). CENTRAL AMERICA: Costa Rica, El Salvador, Honduras, Mexico, Nicaragua, Panama. SOUTH AMERICA: Bolivia, Colombia, Ecuador, Venezuela. ASIA: Bangladesh, Cambodia, China (Anhui, Fujian, Guangdong, Guangxi, Hebei, Henan, Hubei, Hunan, Jiangsu, Jiangxi, Liaoning, Sichuan, Taiwan, Yunnan, Zhejiang), India (Andaman & Nicobar Is, Andhra Pradesh, Assam, Bihar, Delhi, Goa, Gujarat, Haryana, Indian Punjab, Jammu-Kashmir, Karnataka, Kerala, Madhya Pradesh, Maharashtra, Orissa, Tamil Nadu, Uttar Pradesh, West Bengal), Indonesia (Java, Sulawesi, Sumatra), Japan (Honshu, Kyushu), North Korea, South Korea, Laos, Malaysia (Peninsular Malaysia, Sabah, Sarawak), Myanmar, Nepal, Pakistan, Philippines, Sri Lanka, Thailand, Vietnam. AUSTRALASIA: Australia (Northern Territory, Queensland). EUROPE: Russian Federation, Ukraine. TRANSMISSION: Seedborne. The pathogen can be found in the parenchyma, but rarely in the vascular tissues, of husk, embryo and endosperm. It is spread locally by wind and rain and also by flood and irrigation waters from volunteer rice plants, straw and weed hosts. Overwintering may occur on volunteers, or in the rhizospheres of weed hosts, in stored infected straw and in seed. Survival and transmission from soil or plant debris is considered unlikely.

Xanthomonas oryzae pv. oryzicola. [Descriptions of Fungi and Bacteria].

2000 ◽  
Author(s):  
G. S. Saddler
Keyword(s):  
Geographical Distribution ◽  
Winter Season ◽  
Uttar Pradesh ◽  
Peninsular Malaysia ◽  
Xanthomonas Oryzae ◽  
Bacterial Leaf Streak ◽  
Surface Moisture ◽  
Zizania Aquatica ◽  
Late Stages ◽  
Insect Attack

Abstract A description is provided for Xanthomonas oryzae pv. oryzicola. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Oryza sativa, Oryza spp. ; Leersia spp., Leptochloa filiformis, Paspalum orbiculare, Zizania aquatica, Z. palustris and Zoysia japonica (Poaceae). DISEASE: Bacterial leaf streak of rice. The bacterium enters leaves through stomata and wounds (particularly those from insect attack) and multiplies in the sub-stomatal cavity and intercellular spaces in the parenchyma. Eventually, parenchyma is replaced by bacterial masses. Narrow, dark greenish, water-soaked streaks of various lengths appear between the veins. Minute amber droplets of bacterial exudate are commonly found on these lesions. Later the lesions extend and coalesce, giving large brownish patches. There are no records of symptoms on infected seeds. In the late stages symptoms are difficult to distinguish from bacterial leaf blight, lesion margins remaining linear rather than wavy as for the latter. Infection is favoured in rainy conditions or during periods of high humidity. GEOGRAPHICAL DISTRIBUTION: AFRICA: Madagascar, Nigeria, Senegal. ASIA: Bangladesh, Cambodia, China (Fujian, Guangdong, Hainan, Hunan, Taiwan, Zhejiang), India (Bihar, Karnataka, Madhya Pradesh, Maharashtra, Uttar Pradesh, West Bengal), Indonesia (Java, Kalimantan, Sulawesi, Sumatra), Laos, Malaysia (Peninsular Malaysia, Sabah, Sarawak), Myanmar, Nepal, Pakistan, Philippines, Thailand, Vietnam. AUSTRALASIA: Australia (Northern Territory). EUROPE: Russian Federation. TRANSMISSION: Seedborne. There is some evidence of survival on crop debris and in association with weeds. The pathogen spreads within a crop in surface moisture, irrigation water, rain, etc. There is some evidence that the disease cycle can be broken by sowing summer seed in the winter season as it is thought the pathogen cannot become established during the cool, dry, winter weather (RAO, 1987).

Pseudomonas alboprecipitans. [Descriptions of Fungi and Bacteria].

1973 ◽  
Author(s):  
J. F. Bradbury
Keyword(s):  
Geographical Distribution ◽  
Poa Pratensis ◽  
Lolium Multiflorum ◽  
Natural Infection ◽  
The Philippines ◽  
Stalk Rot ◽  
Brown Stripe ◽  
Large Numbers ◽  
Spray Inoculation ◽  
Leaf Surfaces

Abstract A description is provided for Pseudomonas alboprecipitans. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Setaria lutescens, S. italica and Zea mays. Goto & Starr (1971) and Tominaga (1971) report natural infection of Euchlaena mexicana in Japan, while the latter author also reports natural infection of Agropyron pubescens, Bromus catharticus, B. inermis and B. marginatus in Japan, and Hordeum vulgare and Oryza sativa in the Philippines. The following are recorded as susceptible to spray inoculation: Agropyron intermedian ?, Alopecurus pratensis, Arrhenatherum elatius, Avena sativa, Echinochloa frumentacea, Festuca elatior, Holcus lanatus, Lolium multiflorum, Poa pratensis, Phalaris arundinacea, Secale cereale, Setaria geniculata, Sorghum vulgare, S. vulgare var. sudanense, Triticum aestivum. Goto & Starr (1971) also report slight infection of Phaseolus vulgaris with wounding. DISEASE: Bacterial leaf blight and stalk rot of maize and teosinte; bacterial brown stripe of foxtail and various other grasses. On leaves and sheaths spots and streaks are produced. They vary in size and in colour from yellowish or pale brown to dark brown, depending on the host and conditions. On maize, if the stalk rot occurs it is on the upper part of the stem, often at the level where the ears are produced. The top of the plant dies and bleaches. The ears are usually sterile and sometimes become rotted. GEOGRAPHICAL DISTRIBUTION: USA (Alabama, Arkansas, Florida, Georgia, Kansas, Montana, Nebraska, Texas, Virginia), Brazil, Japan, Philippines. TRANSMISSION: Presumably transmitted mainly by wind and rain. Entry into the plant is through stomata and hydathodes and, although bacterial exudate is not seen, large numbers of bacteria can emerge on to wet leaf surfaces, especially on damaged leaves.

Corynebacterium michiganense. [Descriptions of Fungi and Bacteria].

1964 ◽  
Author(s):  
A. C. Hayward
Keyword(s):  
Geographical Distribution ◽  
Vascular System ◽  
Natural Infection ◽  
Climatic Conditions ◽  
Nutrient Concentrations ◽  
Diseased Plant ◽  
Clavibacter Michiganensis ◽  
Nicotiana Glutinosa ◽  
Southern Rhodesia ◽  
Rain Splash

Abstract A description is provided for Corynebacterium michiganense[Clavibacter michiganensis]. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Lycopersicon esculentum and other species of Lycopersicon; also on Cyphomandra betacea, Nicotiana glutinosa, Solanum mammosum, S. muricatum, S. nigrum, (S. douglasii) and other species of Solanum. Natural infection on S. tuberosum has not been recorded. DISEASE: Bacterial canker of tomato. A vascular wilt disease in which splitting of the stems may occur with the formation of yellow or reddish-brown cavities in the pith. Corynebacterium michiganense is a phloem invader, causing wilt symptoms in its host most rapidly at high nutrient concentrations; and conversely, producing maximum development of canker at low nutrient concentrations (27: 394). 'Birds eye' fruit spots occur under some climatic conditions and are round, at first white, later with a light brown roughened centre surrounded by a white halo. Fruits are invaded through the vascular system and show in section a yellow discoloration of the placenta. GEOGRAPHICAL DISTRIBUTION: Widespread, including the U.S.A., where the disease was first described, Canada, Europe, Australia, New Zealand. Africa (including recently Northern and Southern Rhodesia, Kenya and South Africa), China and South America. (CMI Map 26). TRANSMISSION: A wound pathogen spread by cutting knives, or through damaged roots in the soil. Leaf trichomes are also known to be avenues of infection (Phytopathology 52: 1306, 1962). Survives from season to season in soil containing diseased plant material. Fruit spotting is probably caused by rain splash or overhead irrigation water dripping from leaves and cankers. The pathogen is seed transmitted and the incidence of infection may reach 1% from this source (33: 507; 36: 793). Transplanting to the field from seed-bed soil contaminated with plant refuse often results in a stand with over 50% canker (33: 507).

Ustilago esculenta. [Descriptions of Fungi and Bacteria].

1991 ◽  
Author(s):  
J. E. M. Mordue
Keyword(s):  
Geographical Distribution ◽  
Vegetative Propagation ◽  
Wild Rice ◽  
Distribution Map ◽  
Zizania Latifolia ◽  
Novosibirsk Region ◽  
Zizania Aquatica ◽  
Stem Gall ◽  
Ustilago Esculenta ◽  
North Vietnam

Abstract A description is provided for Ustilago esculenta. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Zizania latifolia[Zizania aquatica] (including Z. caduciflora). DISEASE: Stem gall smut of Manchurian wild rice. The first three to four nodes beneath the apical growing point of infected culms become enlarged and the culms fail to flower. The young galls, prior to the development of ustilospores, are used as a vegetable (Gau sun, kah-peh-sung or water shoot). GEOGRAPHICAL DISTRIBUTION: Asia: China, India (Manipur), Hong Kong, Japan, North Vietnam, Taiwan, USSR (Novosibirsk region). Recorded once in USA in glasshouses, but not established in native wild rice. (IMI Distribution Map 628, 1991). TRANSMISSION: Ustilospores are disseminated by wind and water. The smut is systemic and can be transmitted by vegetative propagation of infected plants. Transmission by inoculation of cuttings with suspensions of ustilospores or of sporidia from culture has been demonstrated.

Rhizoctonia oryzae-sativae. [Descriptions of Fungi and Bacteria].

1974 ◽  
Author(s):  
J. E. M. Mordue
Keyword(s):  
Oryza Sativa ◽  
Sri Lanka ◽  
Geographical Distribution ◽  
Crop Residues ◽  
Zizania Latifolia ◽  
Zizania Aquatica ◽  
Rhizoctonia Oryzae

Abstract A description is provided for Rhizoctonia oryzae-sativae. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: On Oryza sativa; has been found on O. cubensis, Juncellus serotinus and Zizania latifolia[Zizania aquatica]. DISEASE: Lesions with pale centres and distinct brown margins develop on sheaths. They are usually small (0.5-1 cm) but several may occur together. Attack on culms results in browning, lodging and death. Can also infect roots. GEOGRAPHICAL DISTRIBUTION: China, Japan; Malaya, Sri Lanka, Taiwan, Vietnam. TRANSMISSION: Soil-borne. Is capable of overwintering in soil as sclerotia or mycelium; also in stubble and other crop residues (11, 801).

Xanthomonas campestris pv. graminis. [Descriptions of Fungi and Bacteria].

1987 ◽  
Author(s):  
K. E. Reay
Keyword(s):  
Geographical Distribution ◽  
Festuca Arundinacea ◽  
Xanthomonas Campestris ◽  
Natural Infection ◽  
Dactylis Glomerata ◽  
Phleum Pratense ◽  
Vascular Bundles ◽  
Poor Growth ◽  
Young Leaves ◽  
Natural Host Range

Abstract A description is provided for Xanthomonas campestris pv. graminis. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Lolium italicum, L. multiflorum, L. perenne, Dactylis glomerata, Festuca pratensis, and Trisetum flavescens. Single cases of natural infection of Agropyron repens, Phalaris arundinacea and Phleum pratense are also recorded (62, 241), but their status in the natural host range is unknown. In inoculation tests (Egli et al., 1975; Egli & Schmidt, 1982) the following were highly susceptible: Alopecurus pratensis, Dactylis glomerata, Festuca arundinacea, F. pratensis, F. rubra, Lolium loliaceum, L. multiforum, L. parabolicae, L. perenne, L. remotum, L. temulentum, Phleum arenarium and P. bertolonii. Showing much less susceptibility were Agrostis alba, Arrhenatherum elatius, Phleum alpinum, P. phleoides, P. pratense, Poa annua, P. compressa, P. fertilis, P. memoralis, P. pratensis and P. trivialis. Leyns et al. (61, 6162) found that Agrosas tenuis and Festuca ovina were moderately susceptible when inoculated. Egli et al. (1975) recorded doubtful symptoms on Hordeum vulgare and Triacum aestivam on inoculation, but consider that they are unlikely to be naturally infected. DISEASE: Bacterial wilt of forage grasses. Symptoms usually first noticed at the heading stage, when young leaves curl and wither, and shoots remain stunted or may die. Other plants will continue to make poor growth and produce small, distorted inflorescences. Chlorotic and necrotic zones form on the older leaves along long stretches of vascular bundles, often extending into the sheaths. Bacterial streaming may be seen under the microscope from the cut ends of vascular bundles of infected tissue mounted in water. GEOGRAPHICAL DISTRIBUTION: CMI Map 533, ed. 1, 1979 lists France, Germany, Switzerland and Wales, to which must be added Scotland (63, 2925), Belgium (61, 4199), Netherlands, Norway (62, 241), and New Zealand (62, 241). Possibly in USA (IL; 61, 5045) though this disease is currently attributed to a Rickettsia- like organism. TRANSMISSION: Within the crop transmission is presumed to be by the blades of mowing machines.

Pyrenophora tritici-repentis. [Descriptions of Fungi and Bacteria].

1976 ◽  
Author(s):  
M. B. Ellis
Keyword(s):  
Geographical Distribution ◽  
Cynodon Dactylon ◽  
Premature Death ◽  
Pyrenophora Tritici Repentis ◽  
Elymus Repens ◽  
Weed Hosts ◽  
Wheat Leaves ◽  
Grass Weed ◽  
Severe Leaf ◽  
Agropyron Repens

Abstract A description is provided for Pyrenophora tritici-repentis. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Wheat, rye, barley, Agropyrons repens, Cynodon dactylon, Elymus glaucus. DISEASES: Causes yellow leaf spot of cereals and grasses; oval to lanceolate. yellow to grey brown lesions often with a yellow halo. The lesions can be distinguished from those caused by Cochliobolus sativus because of their lighter colour. The disease results in premature death of leaves. It can also cause a seedling blight and root rot. Common and widespread on Agropyron repens[Elymus repens] and wheat, occasionally on barley and rye and recorded on many other grasses. Sometimes causes severe leaf wilt and spotting especially on durum wheat. Leaves of Agropyron repens[Elymus repens] when attacked gradually lose their colour and wither from the tips backwards; they become at first pale yellow, later grey. On wheat fusiform, oval or lanceolate spots, 0.5-2 cm long, 2-4 mm wide are formed. These are at first yellow but later turn brown or greyish brown often with a yellow halo. The leaves die prematurely from the tip backwards. GEOGRAPHICAL DISTRIBUTION: Australia; Asia (Japan, India, Nepal); Africa (Uganda, Kenya, Tanzania, Ethiopia); Europe (Britain, Germany, Czechoslovakia, Sweden, Cyprus); S. America (Bolivia); and N. America (Canada, USA). TRANSMISSION: Air-borne spores (51, 1045p), seed-borne by both external contamination and internal infection (34, 24), secondary grass weed hosts (11, 695), carryover on stubble and other crop debris (43, 1225f; 52, 685).

Phoma sorghina. [Descriptions of Fungi and Bacteria].

1985 ◽  
Author(s):  
E. Punithalingam
Keyword(s):  
Sierra Leone ◽  
Geographical Distribution ◽  
Leaf Spot ◽  
West Indies ◽  
Solomon Islands ◽  
Stem Canker ◽  
Crown Rot ◽  
Irian Jaya ◽  
Weed Hosts ◽  
A Minor

Abstract A description is provided for Phoma sorghina. Information is included on the disease caused by the organism, its transmission, geographical distribution, and hosts. HOSTS: Gramineae and all kinds of plants. Also isolated from soil, air and various animal sources. DISEASE: A minor leaf spot of cereals and grasses. The visible symptoms vary considerably; on sorghum leaves spots are usually irregular or rounded, yellowish-brown or grey with definite reddish-purple margins or indefinite in outline, reaching 1 cm or more in width. Pycnidia develop within spots on leaves, glumes and seeds. Also the fungus has been implicated with pre- and post-emergence death of seedlings of Macroptilium and Sylosanthes species (54, 1779) crown rot of bananas (61, 3556), leaf spot of Agave americana and stem rot of Euphorbia tirucalli (63, 3383), brown stem canker of Leucosperum cordifolium (56, 253). GEOGRAPHICAL DISTRIBUTION: A ubiquitous fungus occurring in tropical and subtropical regions. Africa (Botswana, Cameroon, Egypt, Ethiopia, Gambia, Kenya, Malawi, Mauritius, Mozambique, Nigeria, Senegal, Sierra Leone, South Africa, Sudan, Tanzania, Togo, Uganda, Zaire, Zambia, Zimbabwe); Asia (Bangladesh, Brunei, Burma, China, Hong Kong, India, Indonesia (Irian Jaya), Laos, Malaysia, Nepal, Pakistan, Saudi Arabia, Sri Lanka, Taiwan, USSR); Australasia and Oceania (Australia, Hawaii, New Zealand, Papua New Guinea, Solomon Islands); Europe (Germany, Portugal, Italy, UK); North America (Canada, USA); Central America and West Indies (Antigua, Guatemala, Honduras, Jamaica, Nicaragua, Puerto Rico, Trinidad); South America (Argentina, Bolivia, Brazil, Colombia). TRANSMISSION: Probably by contaminated seed; the fungus has been found on or isolated from several seed samples (1, 289; 33, 599; 47, 2153; 54, 1779; 60, 367; 61, 4102). In Taiwan P. sorghina has been found to be transmitted from seed to seedlings (62, 4281). The fungus has also been claimed to persist on trash and weed hosts and remain viable up to 1 yr but lose its viability after 2 yr storage on dry infected leaves (Koch & Rumbold, 1921).

scholarly journals Synanthropic triatomines (Hemiptera, Reduviidae) in the state of Pernambuco, Brazil: geographical distribution and natural Trypanosoma infection rates between 2006 and 2007

2012 ◽  
Vol 45 (1) ◽  
pp. 60-65 ◽  
Author(s):  
Maria Beatriz Araújo Silva ◽  
Ana Virgínia Matos Sá Barreto ◽  
Helker Albuquerque da Silva ◽  
Cleber Galvão ◽  
Dayse Rocha ◽  
...  
Keyword(s):  
Geographical Distribution ◽  
Natural Infection ◽  
Descriptive Analysis ◽  
The State ◽  
Triatoma Infestans ◽  
Infection Rates ◽  
Triatoma Sordida ◽  
Synanthropic Species ◽  
Trypanosoma Infection ◽  
Entomological Data

INTRODUCTION: The present study shows a descriptive analysis of triatomine occurrence and its natural Trypanosoma infection rates in the state of Pernambuco, Brazil, between 2006 and 2007. METHODS: Entomological data for the species, such as specimens captured in both intra and peridomiciles and natural infection index, were obtained via domiciliary capture in 147 municipalities from 11 Regional Managements of Health. The database was obtained from a sample of insects (100% infected and 20% non-infected) sent to the Central Laboratory of Pernambuco. RESULTS: A total of 18,029 triatomines were analyzed from 138 municipalities of the state. Triatoma pseudomaculata (35%), Triatoma brasiliensis (34%), and Panstrongylus lutzi (25%) were the most captured species. These species also showed a widespread geographical distribution in the state. Panstrongylus megistus, Triatoma petrocchiae, Triatoma melanocephala, Triatoma sordida, Rhodnius nasutus, Rhodnius neglectus, and Triatoma infestans showed more limited geographical distribution and lower relative abundance. The parasitological research showed that 8.8% of the triatomines were naturally infected with flagellates morphologically similar to Trypanosoma cruzi and 91.3% of them were captured inside houses in 113 municipalities. P. lutzi showed the highest rates of natural infection. CONCLUSIONS: After the control of T. infestans, synanthropic species, such as T. brasiliensis, T. pseudomaculata, and P. lutzi, maintain the risk of T. cruzi transmission to humans in the state of Pernambuco. These species are widely distributed, and infected specimens have been found inside houses. Thus, an enhanced surveillance and vector control of Chagas disease is recommended in Pernambuco.

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